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Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Fuel cell oxygen electrode  

DOE Patents (OSTI)

An oxygen electrode for a fuel cell utilizing an acid electrolyte has a substrate of an alkali metal tungsten bronze of the formula: A.sub.x WO.sub.3 where A is an alkali metal and x is at least 0.2, which is covered with a thin layer of platinum tungsten bronze of the formula: Pt.sub.y WO.sub.3 where y is at least 0.8.

Shanks, Howard R. (Ames, IA); Bevolo, Albert J. (Ames, IA); Danielson, Gordon C. (Ames, IA); Weber, Michael F. (Wichita, KS)

1980-11-04T23:59:59.000Z

2

Sintered electrode for solid oxide fuel cells  

DOE Patents (OSTI)

A solid oxide fuel cell fuel electrode is produced by a sintering process. An underlayer is applied to the electrolyte of a solid oxide fuel cell in the form of a slurry, which is then dried. An overlayer is applied to the underlayer and then dried. The dried underlayer and overlayer are then sintered to form a fuel electrode. Both the underlayer and the overlayer comprise a combination of electrode metal such as nickel, and stabilized zirconia such as yttria-stabilized zirconia, with the overlayer comprising a greater percentage of electrode metal. The use of more stabilized zirconia in the underlayer provides good adhesion to the electrolyte of the fuel cell, while the use of more electrode metal in the overlayer provides good electrical conductivity. The sintered fuel electrode is less expensive to produce compared with conventional electrodes made by electrochemical vapor deposition processes. The sintered electrodes exhibit favorable performance characteristics, including good porosity, adhesion, electrical conductivity and freedom from degradation.

Ruka, Roswell J. (Pittsburgh, PA); Warner, Kathryn A. (Bryan, TX)

1999-01-01T23:59:59.000Z

3

Nanostructured Solid Oxide Fuel Cell Electrodes  

E-Print Network (OSTI)

in Solid Oxide Fuel Cells (SOFC IX), S. C. Singhal and J.create connected nanostructured SOFC electrodes is reviewed.of Solid Oxide Fuel Cells (SOFC) to directly and efficiently

Sholklapper, Tal Zvi

2007-01-01T23:59:59.000Z

4

Sintered electrode for solid oxide fuel cells  

DOE Patents (OSTI)

A solid oxide fuel cell fuel electrode is produced by a sintering process. An underlayer is applied to the electrolyte of a solid oxide fuel cell in the form of a slurry, which is then dried. An overlayer is applied to the underlayer and then dried. The dried underlayer and overlayer are then sintered to form a fuel electrode. Both the underlayer and the overlayer comprise a combination of electrode metal such as nickel, and stabilized zirconia such as yttria-stabilized zirconia, with the overlayer comprising a greater percentage of electrode metal. The use of more stabilized zirconia in the underlayer provides good adhesion to the electrolyte of the fuel cell, while the use of more electrode metal in the overlayer provides good electrical conductivity. The sintered fuel electrode is less expensive to produce compared with conventional electrodes made by electrochemical vapor deposition processes. The sintered electrodes exhibit favorable performance characteristics, including good porosity, adhesion, electrical conductivity and freedom from degradation. 4 figs.

Ruka, R.J.; Warner, K.A.

1999-06-01T23:59:59.000Z

5

Fuel cell electrode and method of preparation  

DOE Patents (OSTI)

A fuel cell having good resistance to compressive creep includes electrodes having a superstructure of porous electrically conductive foam with surface sections adjacent to opposing surfaces of an electrolyte matrix impregnated with electrode catalyst materials. The catalyst materials are affixed in sections contiguous to an inner major surface by sinter bonding, electrochemical bonding or restrictive interstitial spacing. The outer sections of the porous plaque thickness are reserved for gas distribution to the electrode catalyst. Oxidant and fuel gases can be separately manifolded into alternate sides of a fuel cell stack by sealing opposing edges of the porous plaques containing the anode material in one set of opposing side surfaces and sealing opposing edges of the porous plaque containing cathode material in alternate side surfaces of the stack.

Kaun, T.D

1984-03-02T23:59:59.000Z

6

Fuel cell generator with fuel electrodes that control on-cell fuel reformation  

Science Conference Proceedings (OSTI)

A fuel cell for a fuel cell generator including a housing including a gas flow path for receiving a fuel from a fuel source and directing the fuel across the fuel cell. The fuel cell includes an elongate member including opposing first and second ends and defining an interior cathode portion and an exterior anode portion. The interior cathode portion includes an electrode in contact with an oxidant flow path. The exterior anode portion includes an electrode in contact with the fuel in the gas flow path. The anode portion includes a catalyst material for effecting fuel reformation along the fuel cell between the opposing ends. A fuel reformation control layer is applied over the catalyst material for reducing a rate of fuel reformation on the fuel cell. The control layer effects a variable reformation rate along the length of the fuel cell.

Ruka, Roswell J. (Pittsburgh, PA); Basel, Richard A. (Pittsburgh, PA); Zhang, Gong (Murrysville, PA)

2011-10-25T23:59:59.000Z

7

Fuel cell having dual electrode anode or cathode  

DOE Patents (OSTI)

A fuel cell that is characterized by including a dual electrode anode that is operable to simultaneously electro-oxidize a gaseous fuel and a liquid fuel. In alternative embodiments, a fuel cell having a single electrode anode is provided with a dual electrode cathode that is operable to simultaneously reduce a gaseous oxidant and a liquid oxidant to electro-oxidize a fuel supplied to the cell.

Findl, Eugene (Coram, NY)

1985-01-01T23:59:59.000Z

8

Fuel cell having dual electrode anode or cathode  

DOE Patents (OSTI)

A fuel cell that is characterized by including a dual electrode anode that is operable to simultaneously electro-oxidize a gaseous fuel and a liquid fuel. In alternative embodiments, a fuel cell having a single electrode anode is provided with a dual electrode cathode that is operable to simultaneously reduce a gaseous oxidant and a liquid oxidant to electro-oxidize a fuel supplied to the cell.

Findl, E.

1984-04-10T23:59:59.000Z

9

Method of depositing a catalyst on a fuel cell electrode  

DOE Patents (OSTI)

Fuel cell electrodes comprising a minimal load of catalyst having maximum catalytic activity and a method of forming such fuel cell electrodes. The method comprises vaporizing a catalyst, preferably platinum, in a vacuum to form a catalyst vapor. A catalytically effective amount of the catalyst vapor is deposited onto a carbon catalyst support on the fuel cell electrode. The electrode preferably is carbon cloth. The method reduces the amount of catalyst needed for a high performance fuel cell electrode to about 0.3 mg/cm.sup.2 or less.

Dearnaley, Geoffrey (San Antonio, TX); Arps, James H. (San Antonio, TX)

2000-01-01T23:59:59.000Z

10

Electrode electrolyte interlayers containing cerium oxide for electrochemical fuel cells  

DOE Patents (OSTI)

An electrochemical cell is made having a porous fuel electrode (16) and a porous air electrode (13), with solid oxide electrolyte (15) therebetween, where the air electrode surface opposing the electrolyte has a separate, attached, dense, continuous layer (14) of a material containing cerium oxide, and where electrolyte (16) contacts the continuous oxide layer (14), without contacting the air electrode (13).

Borglum, Brian P. (Edgewood, PA); Bessette, Norman F. (N. Huntingdon, PA)

2000-01-01T23:59:59.000Z

11

Nanostructured Solid Oxide Fuel Cell Electrodes  

E-Print Network (OSTI)

post-Doping of Solid Oxide Fuel Cell Cathodes,? P.h.D.and Technology of Ceramic Fuel Cells, p. 209, Elsevier, NewI. Birss, in Solid Oxide Fuel Cells (SOFC IX), S. C. Singhal

Sholklapper, Tal Zvi

2007-01-01T23:59:59.000Z

12

Capillary Behavior in Porous Fuel Cell Electrodes  

NLE Websites -- All DOE Office Websites (Extended Search)

water inside polymer electrolyte membrane fuel cells is an ongoing technical challenge. Water is produced by the electrochemical reaction in proportion to the current density, so...

13

Fuel cell with Pt/Pd electrocatalyst electrode  

DOE Patents (OSTI)

An electrode for use in a phosphoric acid fuel cell comprising a graphitized or partially graphitized carbon support having a platinum/palladium electrocatalyst thereon. Preferably, the platinum/palladium catalyst comprises 20 to 65 weight percent palladium.

Stonehart, Paul (Madison, CT)

1983-01-01T23:59:59.000Z

14

Neutron Sciences - Electrode Material for Solid-oxide Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Theory meets experiment: structure-property relationships in an electrode Theory meets experiment: structure-property relationships in an electrode material for solid-oxide fuel cells Research Contact: Ana B. Munoz-Garcia December 2012, Written by Agatha Bardoel Fuel cell technology is one potentially very efficient and environmentally friendly way to convert the chemical energy of fuels into electricity. Solid-oxide fuel cells (SOFCs) can convert a wide variety of fuels with simpler, cheaper designs than those used in liquid electrolyte cells. Using the Powder Diffractometer at the Spallation Neutron Source, researchers experimentally characterized the promising new SOFC electrode material strontium iron molybdenum oxide─Sr2Fe1.5Mo0.5O6-δ (SFMO). Combining the experimental results with insights from theory showed that the crystal structure is distorted from the ideal cubic simple perovskite

15

Fuel electrode containing pre-sintered nickel/zirconia for a solid oxide fuel cell  

DOE Patents (OSTI)

A fuel cell structure (2) is provided, having a pre-sintered nickel-zirconia fuel electrode (6) and an air electrode (4), with a ceramic electrolyte (5) disposed between the electrodes, where the pre-sintered fuel electrode (6) contains particles selected from the group consisting of nickel oxide, cobalt and cerium dioxide particles and mixtures thereof, and titanium dioxide particles, within a matrix of yttria-stabilized zirconia and spaced-apart filamentary nickel strings having a chain structure, and where the fuel electrode can be sintered to provide an active solid oxide fuel cell.

Ruka, Roswell J. (Pittsburgh, PA); Vora, Shailesh D. (Monroeville, PA)

2001-01-01T23:59:59.000Z

16

Synthesis and Stability of a Nanoparticle-Infiltrated Solid Oxide Fuel Cell Electrode  

E-Print Network (OSTI)

catalysts infiltrated into SOFC (Solid Oxide Fuel Cell)the demanding environment of SOFC electrodes. Introductioninfiltrated into already formed SOFC electrodes to enhance

Sholklapper, Tal Z.; Radmilovic, Velimir; Jacobson, Craig P.; Visco, Steven J.; De Jonghe, Lutgard C.

2006-01-01T23:59:59.000Z

17

Oxygen electrode reaction in molten carbonate fuel cells  

DOE Green Energy (OSTI)

Molten carbonate fuel cell system is a leading candidate for the utility power generation because of its high efficiency for fuel to AC power conversion, capability for an internal reforming, and a very low environmental impact. However, the performance of the molten carbonate fuel cell is limited by the oxygen reduction reaction and the cell life time is limited by the stability of the cathode material. An elucidation of oxygen reduction reaction in molten alkali carbonate is essential because overpotential losses in the molten carbonate fuel cell are considerably greater at the oxygen cathode than at the fuel anode. Oxygen reduction on a fully-immersed gold electrode in a lithium carbonate melt was investigated by electrochemical impedance spectroscopy and cyclic voltammetry to determine electrode kinetic and mass transfer parameters. The dependences of electrode kinetic and mass transfer parameters on gas composition and temperature were examined to determine the reaction orders and the activation energies. The results showed that oxygen reduction in a pure lithium carbonate melt occurs via the peroxide mechanism. A mass transfer parameter, D{sub O}{sup 1/2}C{sub O}, estimated by the cyclic voltammetry concurred with that calculated by the EIS technique. The temperature dependence of the exchange current density and the product D{sub O}{sup 1/2}C{sub O} were examined and the apparent activation energies were determined to be about 122 and 175 kJ/ mol, respectively.

Appleby, A.J.; White, R.E.

1992-07-07T23:59:59.000Z

18

Solid Oxide Fuel Cell Technologies: Improved Electrode ...  

They are highly fuel-efficient and almost non-polluting, making them an attractive alternative for energy generation. ... Energy Innovation Portal Technologies.

19

Oxygen electrode in molten carbonate fuel cells  

DOE Green Energy (OSTI)

The oxygen reduction reaction on a gold electrode in lithium carbonate melt was investigated to determine the influence of partial pressure of carbon dioxide and temperature on electrode kinetics and oxygen solubility by using cyclic Voltammetry and impedance analysis techniques. During this quarter, the impedance data were analyzed by a Complex Nonlinear Least Square (CNLS) Parameter estimation program to determine the kinetic and the mass transfer related parameters such as charge transfer resistance, double layer capacitance, solution resistance, and Warburg coefficient. The estimated parameters were used to obtain the C0{sub 2} reaction orders and apparent activation energies for the exchange current density and the mass transfer parameter (D{sub o}{sup {1/2}}C{sub o}*).

Dave, B.B.; Srinivasan, S.; White, R.E.; Appleby, A.J.

1989-01-01T23:59:59.000Z

20

The design of a microfabricated air electrode for liquid electrolyte fuel cells  

E-Print Network (OSTI)

In this dissertation, the microfabricated electrode (MFE) concept was applied to the design of an air electrode for liquid electrolyte fuel cells. The catalyst layer of the electrode is envisioned to be fabricated by using ...

Pierre, Fritz, 1977-

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Fabrication of catalytic electrodes for molten carbonate fuel cells  

DOE Patents (OSTI)

A porous layer of catalyst material suitable for use as an electrode in a molten carbonate fuel cell includes elongated pores substantially extending across the layer thickness. The catalyst layer is prepared by depositing particulate catalyst material into polymeric flocking on a substrate surface by a procedure such as tape casting. The loaded substrate is heated in a series of steps with rising temperatures to set the tape, thermally decompose the substrate with flocking and sinter bond the catalyst particles into a porous catalytic layer with elongated pores across its thickness. Employed as an electrode, the elongated pores provide distribution of reactant gas into contact with catalyst particles wetted by molten electrolyte.

Smith, James L. (Lemont, IL)

1988-01-01T23:59:59.000Z

22

Microstructure Optimization in Fuel Cell Electrodes using Materials Design  

DOE Green Energy (OSTI)

Abstract A multiscale model based on statistical continuum mechanics is proposed to predict the mechanical and electrical properties of heterogeneous porous media. This model is applied within the framework of microstructure sensitive design (MSD) to guide the design of the microstructure in porous lanthanum strontium manganite (LSM) fuel cell electrode. To satisfy the property requirement and compatibility, porosity and its distribution can be adjusted under the guidance of MSD to achieve optimized microstructure.

Li, Dongsheng; Saheli, Ghazal; Khaleel, Mohammad A.; Garmestani, Hamid

2006-08-01T23:59:59.000Z

23

Low circumferential voltage gradient self supporting electrode for solid oxide fuel cells  

DOE Patents (OSTI)

The porous, self-supporting, elongated electrode is made, having at least two chambers through its axial length, the chambers separated by an electronically conductive member. This electrode can be an air electrode of a fuel cell, having a superimposed solid electrolyte and fuel electrode.

Reichner, Philip (Plum Boro, PA)

1989-01-01T23:59:59.000Z

24

Influence of electrode stress on proton exchange membrane fuel cell performance : experimental characterization and power optimization  

E-Print Network (OSTI)

Compressive stress applied to the electrode area of a Proton Exchange Membrane (PEM) fuel cell is known to significantly affect power output. In practice, electrode stress arises during operation due to the clamping force ...

Gallant, Betar M. (Betar Maurkah)

2008-01-01T23:59:59.000Z

25

The performance of fluidized beds, packed beds, and screens as fuel cell electrodes  

E-Print Network (OSTI)

At present, most fuel cells employ porous gas diffusion (PGD) electrodes. Although much effort has been spent on their development, the performance and cost of PGD electrodes are still major obstacles to the successful ...

Ruflin, Justin, 1981-

2006-01-01T23:59:59.000Z

26

Design of high-ionic conductivity electrodes for direct methanol fuel cells  

E-Print Network (OSTI)

Carbon-supported porous electrodes are used in low-temperature fuel cells to provide maximum catalyst surface area, while taking up little volume and using minimum catalyst material. In Direct Methanol Fuel Cells (DMFCs), ...

Schrauth, Anthony J

2011-01-01T23:59:59.000Z

27

The effects of chemical pressurization on screen electrode fuel cells  

E-Print Network (OSTI)

A large amount of fuel cell research focuses on porous gas diffusion (PGD) fuel cells which currently produce the best power density. However, this sect of fuel cell technology has many obstacles to overcome before becoming ...

Ahmed, Ali, S.B. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

28

An Investigation of Different Methods of Fabricating Membrane Electrode Assemblies for Methanol Fuel Cells  

E-Print Network (OSTI)

Methanol fuel cells are electrochemical conversion devices that produce electricity from methanol fuel. The current process of fabricating membrane electrode assemblies (MEAs) is tedious and if it is not sufficiently ...

Hall, Kwame (Kwame J.)

2009-01-01T23:59:59.000Z

29

Effects of electrode compression on the performance of a solid polymer electrolyte fuel cell  

E-Print Network (OSTI)

The effects of electrode compression on the performance of a polymer electrolyte fuel cell (PEFC) were investigated. Preliminary testing showed that considerable compression of the carbon cloth electrodes was provided by the PEFC structure. Further, the level of electrode compression was identified as a design parameter having a possible effect on the properties of the electrodes as well as the performance of the PEFC system. Performance-affecting properties of the carbon cloth electrode material, such as electrical conductivity and porosity, were determined over a range of compression levels. Compression was found to have a significant effect on the electrical conductivity and porosity of the carbon cloth electrode material, justifying further testing to measure the effects of electrode compression on PEFC performance. A new PEFC structure was developed which provided uniform mechanical pressure distribution over the area of the electrodes and allowed determination of the level of electrode compression. Utilizing this structure, several fuel cell systems were operated under various levels of electrode compression, and their electrical power output was measured using a linear-sweep voltammetry technique. Fuel cells of two different sizes using two different cathodic reactants--pure oxygen and air--were tested. Results of these experiments were plotted in a manner to illustrate the effect of electrode compression on PEFC performance. Electrode compression was found to have a significant effect on the performance of the PEFC systems observed in this investigation. A level of electrode compression was found for each fuel cell configuration which provided optimal performance. It was concluded from the findings of this work that the performance of PEFC systems utilizing porous carbon cloth electrodes is significantly affected by the level of compression placed on the electrodes. It was further concluded that an electrode compression level exists for PEFC systems which provides optimal performance under a given set of operating conditions.

Del Campo, Christopher Scott

1997-01-01T23:59:59.000Z

30

Fabrication of carbon-aerogel electrodes for use in phosphoric acid fuel cells  

E-Print Network (OSTI)

An experiment was done to determine the ability to fabricate carbon aerogel electrodes for use in a phosphoric acid fuel cell (PAFC). It was found that the use of a 25% solution of the surfactant Cetyltrimethylammonium ...

Tharp, Ronald S

2005-01-01T23:59:59.000Z

31

Method of preparing a dimensionally stable electrode for use in a molten carbonate fuel cell  

DOE Patents (OSTI)

A method is disclosed for preparing a dimensionally stable electrode structure, particularly nickel-chromium anodes, for use in a molten carbonate fuel cell stack. A low-chromium to nickel alloy is provided and oxidized in a mildly oxidizing gas of sufficient oxidation potential to oxidize chromium in the alloy structure. Typically, a steam/H/sub 2/ gas mixture in a ratio of about 100/1 and at a temperature below 800/sup 0/C is used as the oxidizing medium. This method permits the use of less than 5 wt % chromium in nickel alloy electrodes while obtaining good resistance to creep in the electrodes of a fuel cell stack.

Swarr, T.E.; Wnuck, W.G.

1986-01-29T23:59:59.000Z

32

Gas Diffusion Electrodes for Fuel Cells - Energy Innovation Portal  

A unique gas diffusion electrode technique resulting in little to no leftover methanol, therefore increasing the overall effectiveness and performance ...

33

Durable Fuel Cell Membrane Electrode Assembly (MEA) - Energy ...  

Technology Marketing Summary The membrane electrode assembly (MEA) is an essential, yet highly expensive component of any polymer electrolyte membrane ...

34

Spectroelectrochemical study of the role played by carbon functionality in fuel cell electrodes  

Science Conference Proceedings (OSTI)

X-ray absorption spectroscopy was used to identify specific types of nitrogen and sulfur-based carbon functionality present in the carbon black supports of fuel cell anodes and cathodes. The effects of these functional groups on the electrocatalytic performance of small platinum particles, dispersed on the carbon, during methanol oxidation and oxygen reduction were assessed. Electrodes functionalized with nitrogen had enhanced catalytic activities toward oxygen reduction and methanol oxidation relative to untreated electrodes. Although electrodes with sulfur functionality had higher oxygen reduction activities than untreated carbons, the activity of these electrodes toward methanol oxidation was found to be lower than electrodes manufactured from untreated carbon. It was found that carbon supports functionalized with both nitrogen and sulfur initiated the formation of Pt particles smaller in size than those observed on untreated carbon supports.

Roy, S.C.; Harding, A.W.; Russell, A.E.; Thomas, K.M. [Univ. of Newcastle, Newcastle-upon-Tyne (United Kingdom)

1997-07-01T23:59:59.000Z

35

Simplified process for leaching precious metals from fuel cell membrane electrode assemblies  

DOE Patents (OSTI)

The membrane electrode assemblies of fuel cells are recycled to recover the catalyst precious metals from the assemblies. The assemblies are cryogenically embrittled and pulverized to form a powder. The pulverized assemblies are then mixed with a surfactant to form a paste which is contacted with an acid solution to leach precious metals from the pulverized membranes.

Shore, Lawrence (Edison, NJ); Matlin, Ramail (Berkeley Heights, NJ)

2009-12-22T23:59:59.000Z

36

High Surface Area Molybdenum Nitride Support for Fuel Cell Electrodes  

SciTech Connect

Alternative supports for polymer electrolyte membrane fuel cells were synthesized and catalytic activity was explored using electrochemical analysis. High surface area, molybdenum nitride supports were synthesized by rapidly heating a gel of polyethyleneimine bound molybdenum in a tube furnace under a forming gas atmosphere. Subsequent disposition of platinum through an incipient wetness approach lead to dispersed crystallites of platinum on the conductive support. All the ceramic materials were characterized with XRD, SEM, TEM and electrochemical analysis. The supports without platinum are highly stable to acidic aqueous conditions and show no signs of oxygen reduction reactivity (ORR). However, once the 20 wt % platinum is added to the material, ORR activity comparable to XC72 based materials is observed.

Blackmore, Karen [Los Alamos National Laboratory (LANL); Elbaz, L [Los Alamos National Laboratory (LANL); Bauer, E D [Los Alamos National Laboratory (LANL); Brosha, Eric [Los Alamos National Laboratory (LANL); More, Karren Leslie [ORNL; Mccleskey, T [Los Alamos National Laboratory (LANL); Burrell, A [Los Alamos National Laboratory (LANL)

2011-01-01T23:59:59.000Z

37

Oxygen electrode reaction in molten carbonate fuel cells. Final report, September 15, 1987--September 14, 1990  

DOE Green Energy (OSTI)

Molten carbonate fuel cell system is a leading candidate for the utility power generation because of its high efficiency for fuel to AC power conversion, capability for an internal reforming, and a very low environmental impact. However, the performance of the molten carbonate fuel cell is limited by the oxygen reduction reaction and the cell life time is limited by the stability of the cathode material. An elucidation of oxygen reduction reaction in molten alkali carbonate is essential because overpotential losses in the molten carbonate fuel cell are considerably greater at the oxygen cathode than at the fuel anode. Oxygen reduction on a fully-immersed gold electrode in a lithium carbonate melt was investigated by electrochemical impedance spectroscopy and cyclic voltammetry to determine electrode kinetic and mass transfer parameters. The dependences of electrode kinetic and mass transfer parameters on gas composition and temperature were examined to determine the reaction orders and the activation energies. The results showed that oxygen reduction in a pure lithium carbonate melt occurs via the peroxide mechanism. A mass transfer parameter, D{sub O}{sup 1/2}C{sub O}, estimated by the cyclic voltammetry concurred with that calculated by the EIS technique. The temperature dependence of the exchange current density and the product D{sub O}{sup 1/2}C{sub O} were examined and the apparent activation energies were determined to be about 122 and 175 kJ/ mol, respectively.

Appleby, A.J.; White, R.E.

1992-07-07T23:59:59.000Z

38

Heat and water transport in a polymer electrolyte fuel cell electrode  

SciTech Connect

In the present scenario of a global initiative toward a sustainable energy future, the polymer electrolyte fuel cell (PEFC) has emerged as one of the most promising alternative energy conversion devices for various applications. Despite tremendous progress in recent years, a pivotal performance limitation in the PEFC comes from liquid water transport and the resulting flooding phenomena. Liquid water blocks the open pore space in the electrode and the fibrous diffusion layer leading to hindered oxygen transport. The electrode is also the only component in the entire PEFC sandwich which produces waste heat from the electrochemical reaction. The cathode electrode, being the host to several competing transport mechanisms, plays a crucial role in the overall PEFC performance limitation. In this work, an electrode model is presented in order to elucidate the coupled heat and water transport mechanisms. Two scenarios are specifically considered: (1) conventional, Nafion{reg_sign} impregnated, three-phase electrode with the hydrated polymeric membrane phase as the conveyer of protons where local electro-neutrality prevails; and (2) ultra-thin, two-phase, nano-structured electrode without the presence of ionomeric phase where charge accumulation due to electro-statics in the vicinity of the membrane-CL interface becomes important. The electrode model includes a physical description of heat and water balance along with electrochemical performance analysis in order to study the influence of electro-statics/electro-migration and phase change on the PEFC electrode performance.

Mukherjee, Partha P [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory; Borup, Rod L [Los Alamos National Laboratory; Ranjan, Devesh [TEXAS A& M UNIV

2010-01-01T23:59:59.000Z

39

Modified cermet fuel electrodes for solid oxide electrochemical cells  

DOE Patents (OSTI)

An exterior porous electrode (10), bonded to a solid oxygen ion conducting electrolyte (13) which is in contact with an interior electrode (14), contains coarse metal particles (12) of nickel and/or cobalt, having diameters from 3 micrometers to 35 micrometers, where the coarse particles are coated with a separate, porous, multiphase layer (17) containing fine metal particles of nickel and/or cobalt (18), having diameters from 0.05 micrometers to 1.75 micrometers and conductive oxide (19) selected from cerium oxide, doped cerium oxide, strontium titanate, doped strontium titanate and mixtures thereof.

Ruka, Roswell J. (Churchill Boro, PA); Spengler, Charles J. (Murrysville, PA)

1991-01-01T23:59:59.000Z

40

Ionomer Degradation in Electrodes of PEM Fuel Cell  

SciTech Connect

Although PEMFC Membrane Electrode Assembly (MEA) durability related studies have increased dramatically since 2004, studies on ionomer degradation of the composite electrodes has received far less attention than that of the proton exchange membranes, electrocatalysts, and catalyst supports. The catalyst layer ionomer unavoidably gets involved in other components degradation processes since it is subjected to exposure to different operating effects, including the presence of the catalyst, catalyst support, and the porous nature of the electrode layer which includes 2-phase flow. PEMFC durability issues cannot be fully resolved without understanding the contribution of ionomer degradation in electrode to the performance decay in life time. However, addressing the impact of changes to the catalyst layer ionomer during durability tests is experimentally difficult mainly because of the need to separate the ionomer in the electrode from other components during chemical, electrical and materials characterization. The catalyst layer ionomer is essentially chemically identical to the membrane ionomeric material, and is composed of low atomic number elements, making characterization difficult. In the present work, MEAs with different Nafion ionomer types: stabilized and non-stablized ionomer in the electrode layer (Type I) and mixed membrane/ionomer MEAs (Type II) were designed to separate ionomer degradation from membrane degradation, as shown in Figure (1a) and (b) respectively. Stabilized and non stabilized ionomers were 5% Nafion{reg_sign} solutions (Ion Power, New Castle, Delaware). The non-stabilized version is the typical Nafion chemical structure with carboxylic acid (-COOH) end groups; these end groups are thought to be a susceptible point of degradative peroxide attack. The stabilized version replaces the -COOH end groups with -CF{sub 3} end groups to prevent peroxide attack at the end groups. Type I MEAs were designed to compare ionomer degradation and its effect on performance decay. Since F{sup -} ions are released only from PFSA based membranes, and not from non-PFSA based membranes, Type II MEAs use a hydrocarbon membrane with no fluorine with a PFSA (Nafion{reg_sign}) ionomer in the catalyst layer for FER measurements. Any F{sup -} ions measured will then have come only for the catalyst layer ionomer during degradation experiments. Type II MEAs allow more detailed chemical characterization exclusively of the catalyst layer ionomer to better understand its degradation.

Borup, Rodney L. [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Method for recovering catalytic elements from fuel cell membrane electrode assemblies  

DOE Patents (OSTI)

A method for recovering catalytic elements from a fuel cell membrane electrode assembly is provided. The method includes converting the membrane electrode assembly into a particulate material, wetting the particulate material, forming a slurry comprising the wetted particulate material and an acid leachate adapted to dissolve at least one of the catalytic elements into a soluble catalytic element salt, separating the slurry into a depleted particulate material and a supernatant containing the catalytic element salt, and washing the depleted particulate material to remove any catalytic element salt retained within pores in the depleted particulate material.

Shore, Lawrence (Edison, NJ); Matlin, Ramail (Berkeley Heights, NJ); Heinz, Robert (Ludwigshafen, DE)

2012-06-26T23:59:59.000Z

42

Platinum loss and migration in porous gas diffusion fuel cell electrodes as studied by Rutherford backscattering  

DOE Green Energy (OSTI)

Long-term operation of phosphoric acid fuel cell produces severe migration of the highly dispersed electrocatalyst, Pt, from the cathode to the anode. We have examined, before and after extended operation, the porous gas diffusion electrode assemblies by conventional Rutherford backscattering spectrometry using the ion beam facility at Los Alamos. In addition, we have made computer simulations to the data that give catalyst concentration as a function of depth. The data demonstrate that after extended operation (500 to 2000 hours), Pt is lost from the cathode and is redeposited at the outermost surface layers of the anode electrode structure. This loss is significant and several factors contributing to it are discussed.

Borodovsky, L.; Beery, J.G.; Paffett, M.

1986-01-01T23:59:59.000Z

43

Process for recycling components of a PEM fuel cell membrane electrode assembly  

Science Conference Proceedings (OSTI)

The membrane electrode assembly (MEA) of a PEM fuel cell can be recycled by contacting the MEA with a lower alkyl alcohol solvent which separates the membrane from the anode and cathode layers of the assembly. The resulting solution containing both the polymer membrane and supported noble metal catalysts can be heated under mild conditions to disperse the polymer membrane as particles and the supported noble metal catalysts and polymer membrane particles separated by known filtration means.

Shore, Lawrence (Edison, NJ)

2012-02-28T23:59:59.000Z

44

Lanthanum manganite-based air electrode for solid oxide fuel cells  

DOE Patents (OSTI)

An air electrode material for a solid oxide fuel cell is disclosed. The electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO.sub.3. The A-site of the air electrode material preferably comprises La, Ca, Ce and at least one lanthanide selected from Sm, Gd, Dy, Er, Y and Nd. The B-site of the electrode material comprises Mn with substantially no dopants. The ratio of A:B is preferably slightly above 1. A preferred air electrode composition is of the formula La.sub.w Ca.sub.x Ln.sub.y Ce.sub.z MnO.sub.3, wherein Ln comprises at least one lanthanide selected from Sm, Gd, Dy, Er, Y and Nd, w is from about 0.55 to about 0.56, x is from about 0.255 to about 0.265, y is from about 0.175 to about 0.185, and z is from about 0.005 to about 0.02. The air electrode material possesses advantageous chemical and electrical properties as well as favorable thermal expansion and thermal cycle shrinkage characteristics.

Ruka, Roswell J. (Pittsburgh, PA); Kuo, Lewis (Monroeville, PA); Li, Baozhen (Essex Junction, VT)

1999-01-01T23:59:59.000Z

45

NREL Develops Technique to Measure Membrane Thickness and Defects in Polymer Electrode Membrane Fuel Cells (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet describes NREL's accomplishments in fuel cell membrane electrode assembly research and development. Work was performed by the Hydrogen Technologies and Systems Center and the National Center for Photovoltaics.

Not Available

2010-11-01T23:59:59.000Z

46

Sintering aid for lanthanum chromite refractories. [As interconnect layer between electrodes in fuel cells  

DOE Patents (OSTI)

An electronically conductive interconnect layer for use in a fuel cell or other electrolytic device is formed with sintering additives to permit densification in a monolithic structure with the electrode materials. Additions, including an oxide of boron and a eutectic forming composition of Group 2A metal fluorides with Group 3B metal fluorides and Group 2A metal oxides with Group 6B metal oxides, lower the required firing temperature of lanthanum chromite to permit densification to in excess of 94% of theoretical density without degradation of electrode material lamina. The monolithic structure is formed by tape casting thin layers of electrode, interconnect and electrolyte materials and sintering the green lamina together under common densification conditions.

Flandermeyer, B.K.; Poeppel, R.B.; Dusek, J.T.; Anderson, H.U.

1986-10-23T23:59:59.000Z

47

Electrochemistry of . . . ELECTRODES WITH APPLICATIONS TO FUEL CELLS AND CARBON DIOXIDE CONVERSION DEVICES  

E-Print Network (OSTI)

There is a growing awareness of the need for basic and applied energy research due to the environmental impact of energy use and limitations in the supply of energy sources. In this work, electrochemical research is reported for fuel cells and carbon dioxide reduction, with the aim of reducing the environmental footprint of global energy use. In studies of the formic acid fuel cell, it is reported here that an increase in the formic acid fuel pH increases the rate of formic acid oxidation on palladium and platinum. It is also shown that an increase in fuel pH decreases the potential at which the catalyst poison is removed from the electrode surface. This poison is detrimental to fuel cell operation. This work reports the first such studies in an electrochemical cell on high surface area platinum and palladium nanoparticles. New catalyst formulations were developed via electrochemical surface modification in attempt to eliminate the catalyst poisoning and improve performance of the formic acid fuel cell. Electrochemical studies showed substantial improvement to the rate of formic acid oxidation by a combination of high surface area palladium with tin,

John Leonard Haan

2010-01-01T23:59:59.000Z

48

LOW-TEMPERATURE, ANODE-SUPPORTED HIGH POWER DENSITY SOLID OXIDE FUEL CELLS WITH NANOSTRUCTURED ELECTRODES  

DOE Green Energy (OSTI)

This report summarizes the work done during the entire project period, between October 1, 1999 and March 31, 2003, which includes a six-month no-cost extension. During the project, eight research papers have, either been, published, accepted for publication, or submitted for publication. In addition, several presentations have been made in technical meetings and workshops. The project also has provided support for four graduate students working towards advanced degrees. The principal technical objective of the project was to analyze the role of electrode microstructure on solid oxide fuel cell performance. Prior theoretical work conducted in our laboratory demonstrated that the particle size of composite electrodes has a profound effect on cell performance; the finer the particle size, the lower the activation polarization, the better the performance. The composite cathodes examined consisted of electronically conducting perovskites such as Sr-doped LaMnO{sub 3} (LSM) or Sr-doped LaCoO{sub 3} (LSC), which is also a mixed conductor, as the electrocatalyst, and yttria-stabilized zirconia (YSZ) or rare earth oxide doped CeO{sub 2} as the ionic conductor. The composite anodes examined were mixtures of Ni and YSZ. A procedure was developed for the synthesis of nanosize YSZ by molecular decomposition, in which unwanted species were removed by leaching, leaving behind nanosize YSZ. Anode-supported cells were made using the as-synthesized powders, or using commercially acquired powders. The electrolyte was usually a thin ({approx}10 microns), dense layer of YSZ, supported on a thick ({approx}1 mm), porous Ni + YSZ anode. The cathode was a porous mixture of electrocatalyst and an ionic conductor. Most of the cell testing was done at 800 C with hydrogen as fuel and air as the oxidant. Maximum power densities as high as 1.8 W/cm{sup 2} were demonstrated. Polarization behavior of the cells was theoretically analyzed. A limited amount of cell testing was done using liquid hydrocarbon fuels where reforming was achieved internally. Significant polarization losses also occur at the anode, especially at high fuel utilizations. An analysis of polarization losses requires that various contributions are isolated, and their dependence on pertinent parameters is quantitatively described. An investigation of fuel composition on gas transport through porous anodes was investigated and the role of fuel diluents was explored. This work showed that the molecular weight of the diluent has a significant effect on anode concentration polarization. This further showed that the presence of some molecular hydrogen is necessary to minimize polarization losses. Theoretical analysis has shown that the electrode microstructure has a profound effect on cell performance. In a series of experiments, cathode microstructural parameters were varied, without altering other parameters. Cathode microstructural parameters, especially three phase boundary (TPB) length, were estimated using techniques in quantitative stereology. Cell performance was quantitatively correlated with the relevant microstructural parameters, and charge transfer resistivity was explicitly evaluated. This is the first time that a fundamental parameter, which governs the activation polarization, has been quantitatively determined. An important parameter, which governs the cathodic activation polarization, and thus cell performance, is the ionic conductivity of the composite cathode. The traditional composite cathode is a mixture of LSM and YSZ. It is well known that Sr and Mg-doped LaGaO{sub 3} (LSGM), exhibits higher oxygen ion conductivity compared to YSZ. Cells were fabricated with composite cathodes comprising a mixture of LSM and LSGM. Studies demonstrated that LSGM-based composite cathodes exhibit excellent behavior. Studies have shown that Ni + YSZ is an excellent anode. In fact, in most cells, the principal polarization losses, at least at low fuel utilizations, are associated with the cathode. Theoretical analysis conducted in our group has also shown that anode-supported cells exhibi

Professor Anil V. Virkar

2003-05-23T23:59:59.000Z

49

Conditioning effects on La1-xSrxMnO3-Yttria stabilized Zirconia electrodes for thin-film solid oxide fuel cells  

E-Print Network (OSTI)

Proceedings 5th Intern. Symp. SOFC, Aachen, Germany, Juneof a solid oxide fuel cell (SOFC). LSM surface contaminationthin-film onto porous SOFC electrodes/substrates have

2002-01-01T23:59:59.000Z

50

NREL Develops Technique to Measure Membrane Thickness and Defects in Polymer Electrode Membrane Fuel Cells (Fact Sheet), Hydrogen and Fuel Cell Technical Highlights (HFCTH)  

NLE Websites -- All DOE Office Websites (Extended Search)

4 * November 2010 4 * November 2010 2-D image of a PEM fuel cell membrane sample measured with the NREL device (corresponding optical image in inset). The image shows bubble defects and a color shift in the sample. An area of approximately three inches by three inches is shown. NREL Develops Technique to Measure Membrane Thickness and Defects in Polymer Electrode Membrane Fuel Cells Project: Fuel Cell MEA Manufacturing R&D NREL Team: Hydrogen Technologies & Systems Center and National Center for Photovoltaics Accomplishment: NREL developed a technique to measure the two-dimensional thickness of polymer electrolyte membrane (PEM) fuel cell membranes for in-line quality control during manufacturing (first reported in May 2009). The technique is based on an NREL-developed instrument currently used in continuous manufacturing of photovoltaic cells. This

51

SPOUTED BED ELECTRODES (SBE) FOR DIRECT UTILIZATION OF CARBON IN FUEL CELLS  

DOE Green Energy (OSTI)

This Phase I project was focused on an investigation of spouted bed particulate electrodes for the direct utilization of solid carbon in fuel cells. This approach involves the use of a circulating carbon particle/molten carbonate slurry in the cell that provides a few critical functions: it (1) fuels the cell continuously with entrained carbon particles; (2) brings particles to the anode surfaces hydrodynamically; (3) removes ash from the anode surfaces and the cell hydrodynamically; (4) provides a facile means of cell temperature control due to its large thermal capacitance; (5) provides for electrolyte maintenance and control in the electrode separator(s); and (6) can (potentially) improve carbon conversion rates by ''pre-activating'' carbon particle surfaces via formation of intermediate oxygen surface complexes in the bulk molten carbonate. The approach of this scoping project was twofold: (1) adaptation and application of a CFD code, originally developed to simulate particle circulation in spouted bed electrolytic reactors, to carbon particle circulation in DCFC systems; and (2) experimental investigation of the hydrodynamics of carbon slurry circulation in DCFC systems using simulated slurry mixtures. The CFD model results demonstrated that slurry recirculation can be used to hydrodynamically feed carbon particles to anode surfaces. Variations of internal configurations were investigated in order to explore effects on contacting. It was shown that good contacting with inclined surfaces could be achieved even when the particles are of the same density as the molten carbonate. The use of CO{sub 2} product gas from the fuel cell as a ''lift-gas'' to circulate the slurry was also investigated with the model. The results showed that this is an effective method of slurry circulation; it entrains carbon particles more effectively in the draft duct and produces a somewhat slower recirculation rate, and thus higher residence times on anode surfaces, and can be controlled completely via pressure balance. Experimental investigations in a rectangular spouted vessel hydrodynamics apparatus (SVHA) showed that hydrodynamics can be used to control the circulation, residence time, and distribution of carbon within the spouted bed, as well as provide good particle contact with anode surfaces. This was shown to be a function of viscosity, carbon loading, and particle size, as well as relative densities. Higher viscosities and smaller particle sizes favor more efficient particle entrainment in the draft duct, and particle recirculation. Both the computational and experimental results are consistent with each another and exhibit the same general qualitative behavior. Based upon this work, a design of a prototype SBE/DCFC cell was developed and is presented.

J.M. Calo

2004-12-01T23:59:59.000Z

52

Novel Electrode Materials for Low-Temperature Solid-Oxide Fuel Cells  

DOE Green Energy (OSTI)

Composites electrodes consisting of silver and bismuth vanadates exhibit remarkable catalytic activity for oxygen reduction at 500-550 C and greatly reduce the cathode-electrolyte (doped ceria) resistances of low temperature SOFCs, down to about 0.53 {omega}cm{sup 2} at 500 C and 0.21 {omega}cm{sup 2} at 550 C. The observed power densities of 231, 332, and 443 mWcm-2 at 500, 525 and 550 C, respectively, make it possible to operate SOFCs at temperatures about 500 C. Fuel cell performance depends strongly on the anode microstructure, which is determined by the anode compositions and fabrication conditions. Four types of anodes with two kinds of NiO and GDC powders were investigated. By carefully adjusting the anode microstructure, the GDC electrolyte/anode interfacial polarization resistances reduced dramatically. The interfacial resistance at 600 C decreased from 1.61 {omega} cm{sup 2} for the anodes prepared using commercially available powders to 0.06 {omega} cm{sup 2} for those prepared using powders derived from a glycine-nitrate process. Although steam reforming or partial oxidation is effective in avoiding carbon deposition of hydrocarbon fuels, it increases the operating cost and reduces the energy efficiency. Anode-supported SOFCs with an electrolyte of 20 {micro}m-thick Gd-doped ceria (GDC) were fabricated by co-pressing. A catalyst (1 %wt Pt dispersed on porous Gd-doped ceria) for pre-reforming of propane was developed with relatively low steam to carbon (S/C) ratio ({approx}0.5), coupled with direct utilization of the reformate in low-temperature SOFCs. Propane was converted to smaller molecules during pre-reforming, including H{sub 2}, CH{sub 4}, CO, and CO{sub 2}. A peak power density of 247 mW/cm{sup 2} was observed when pre-reformed propane was directly fed to an SOFC operated at 600 C. No carbon deposition was observed in the fuel cell for a continuous operation of 10 hours at 600 C. The ability of producing vastly different microstructures and morphologies of the very same material is critical to the fabrication of functionally graded electrodes for solid-state electrochemical devices such as SOFCs and lithium batteries. By carefully adjusting deposition parameters, we have successfully produced oxide nano-powders with the size of 30 {approx} 200 nm. Porous films with various microstructures and morphologies are also deposited on several substrates by systematic adjustment of the deposition parameters. Highly porous, excellently bonded and nano-structured electrodes fabricated by combustion CVD exhibit extremely high surface area and remarkable catalytic activities. Using in situ potential dependent FTIR emission spectroscopy, we have found evidence for two, possibly three distinct di-oxygen species present on the electrode surface. We have successfully identified which surface oxygen species is present under a particular electrical or chemical condition and have been able to deduce the reaction mechanisms. This technique will be used to probe the gas-solid interactions at or near the TPB and on the surfaces of mixed-conducting electrodes in an effort to understand the molecular processes relevant to the intrinsic catalytic activity. Broad spectral features are assigned to the electrochemical-polarization-induced changes in the optical properties of the electrode surface layer.

Shaowu Zha; Meilin Liu

2005-03-23T23:59:59.000Z

53

LOW-TEMPERATURE, ANODE-SUPPORTED HIGH POWER DENSITY SOLID OXIDE FUEL CELLS WITH NANOSTRUCTURED ELECTRODES  

DOE Green Energy (OSTI)

A simple, approximate analysis of the effect of differing cathode and anode areas on the measurement of cell performance on anode-supported solid oxide fuel cells, wherein the cathode area is smaller than the anode area, is presented. It is shown that the effect of cathode area on cathode polarization, on electrolyte contribution, and on anode resistance, as normalized on the basis of the cathode area, is negligible. There is a small but measurable effect on anode polarization, which results from concentration polarization. Effectively, it is the result of a greater amount of fuel transported to the anode/electrolyte interface in cases wherein the anode area is larger than the cathode area. Experiments were performed on cells made with differing cathode areas and geometries. Cathodic and anodic overpotentials measured using reference electrodes, and the measured ohmic area specific resistances by current interruption, were in good agreement with expectations based on the analysis presented. At 800 C, the maximum power density measured with a cathode area of {approx}1.1 cm{sup 2} was {approx}1.65 W/cm{sup 2} compared to {approx}1.45 W/cm{sup 2} for cathode area of {approx}2 cm{sup 2}, for anode thickness of {approx}1.3 mm, with hydrogen as the fuel and air as the oxidant. At 750 C, the measured maximum power densities were {approx}1.3 W/cm{sup 2} for the cell with cathode area {approx}1.1 cm{sup 2}, and {approx}1.25 W/cm{sup 2} for the cell with cathode area {approx}2 cm{sup 2}.

Anil V. Virkar

2001-06-21T23:59:59.000Z

54

Solid oxide fuel cell with single material for electrodes and interconnect  

DOE Patents (OSTI)

A solid oxide fuel cell having a plurality of individual cells. A solid oxide fuel cell has an anode and a cathode with electrolyte disposed therebetween, and the anode, cathode and interconnect elements are comprised of substantially one material.

McPheeters, Charles C. (Naperville, IL); Nelson, Paul A. (Wheaton, IL); Dees, Dennis W. (Downers Grove, IL)

1994-01-01T23:59:59.000Z

55

High Speed, Low Cost Fabrication of Gas Diffusion Electrodes for Membrane Electrode Assemblies - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

8 8 DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report Emory S. De Castro BASF Fuel Cell, Inc. 39 Veronica Avenue Somerset, NJ 08873 Phone: (732) 545-5100 ext 4114 Email: Emory.DeCastro@BASF.com DOE Managers HQ: Nancy Garland Phone: (202) 586-5673 Email: Nancy.Garland@ee.doe.gov GO: Jesse Adams Phone: (720) 356-1421 Email: Jesse.Adams@go.doe.gov Contract Number: DE-EE0000384 Subcontractor: Dr. Vladimir Gurau Case Western Reserve University, Cleveland, Ohio Project Start Date: July 1, 2009 Project End Date: June 30, 2013 Fiscal Year (FY) 2012 Objectives Reduce cost in fabricating gas diffusion electrodes * through the introduction of high speed coating technology, with a focus on materials used for the high- temperature membrane electrode assemblies (MEAs)

56

Highly porous platinum electrodes for the use in potentially implantable glucose fuel cells.  

E-Print Network (OSTI)

??Implantable glucose fuel cells are investigated as self-regenerative, long-term approach to power medical implants such as cardiac pacemakers. Such fuel cells use ambient energy of (more)

Kloke, Arne

2012-01-01T23:59:59.000Z

57

Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science » Materials Science » Fuel Cells Fuel Cells Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this century. Get Expertise Melissa Fox Applied Energy Email Catherine Padro Sensors & Electrochemical Devices Email Fernando Garzon Sensors & Electrochemical Devices Email Piotr Zelenay Sensors & Electrochemical Devices Email Rod Borup Sensors & Electrochemical Devices Email Karen E. Kippen Experimental Physical Sciences Email Like a battery, a fuel cell consists of two electrodes separated by an electrolyte-in polymer electrolyte fuel cells, the separator is made of a thin polymeric membrane. Unlike a battery, a fuel cell does not need recharging-it continues to produce electricity as long as fuel flows

58

Supporting electrodes for solid oxide fuel cells and other electrochemical devices  

DOE Patents (OSTI)

An electrode supported electrolyte membrane includes an electrode layer 630 facing an electrolyte layer 620. The opposing side of the electrode layer 630 includes a backing layer 640 of a material with a thermal expansion coefficient approximately equal to the thermal expansion coefficient of the electrolyte layer 620. The backing layer 640 is in a two dimensional pattern that covers only a portion of the electrolyte layer 630. An electrochemical cell such as a SOFC is formed by providing a cathode layer 610 on an opposing side of the electrolyte layer 620.

Sprenkle, Vincent L. (Richland, WA); Canfield, Nathan L. (Kennewick, WA); Meinhardt, Kerry (Kennewick, WA); Stevenson, Jeffry W. (Richland, WA)

2008-04-01T23:59:59.000Z

59

Solid oxide fuel cell with single material for electrodes and interconnect  

DOE Patents (OSTI)

A solid oxide fuel cell is described having a plurality of individual cells. A solid oxide fuel cell has an anode and a cathode with electrolyte disposed there between, and the anode, cathode and interconnect elements are comprised of substantially one material. 9 figs.

McPheeters, C.C.; Nelson, P.A.; Dees, D.W.

1994-07-19T23:59:59.000Z

60

Molecular-scale, Three-dimensional Non-Platinum Group Metal Electrodes for Catalysis of Fuel Cell Reactions  

NLE Websites -- All DOE Office Websites (Extended Search)

Molecular-scale, Three-dimensional Non-Platinum Group Molecular-scale, Three-dimensional Non-Platinum Group Metal Electrodes for Catalysis of Fuel Cell Reactions John B. Kerr Lawrence Berkeley National Laboratory (LBNL) September 30, 2009 Team Members: Adam Weber, Rachel Segalman, Robert Kostecki, Jeff Reimer, John Arnold, Martin Head-Gordon (LBNL). Piotr Zelenay, James Boncella, Yu Seung Kim, Neil Henson, Jerzy Chlistunoff (LANL). Steve Hamrock, Radoslav Atanasoski (3M) Budget: DOE share - $9.58MM over four years; 3M share - in-kind over four years. 2 Objectives 1) Demonstrate that non-platinum group metal catalysts can be used for oxygen reduction in polymer-coated electrode structures based on polyelectrolyte membranes. 2) Incorporate catalysts into polymer binders of composite electrodes for the construction of MEAs to demonstrate that this

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61

Low platinum loading electrospun electrodes for proton exchange membrane fuel cells  

E-Print Network (OSTI)

An experimental study was performed to evaluate the utility of electrospun carbon nanofiber supports for sputtered platinum catalyst in proton exchange membrane fuel cells. The performance of the sputtered nanofiber supports ...

Singer, Simcha Lev

2006-01-01T23:59:59.000Z

62

Electrolytic/fuel cell bundles and systems including a current collector in communication with an electrode thereof  

DOE Patents (OSTI)

Electrolytic/fuel cell bundles and systems including such bundles include an electrically conductive current collector in communication with an anode or a cathode of each of a plurality of cells. A cross-sectional area of the current collector may vary in a direction generally parallel to a general direction of current flow through the current collector. The current collector may include a porous monolithic structure. At least one cell of the plurality of cells may include a current collector that surrounds an outer electrode of the cell and has at least six substantially planar exterior surfaces. The planar surfaces may extend along a length of the cell, and may abut against a substantially planar surface of a current collector of an adjacent cell. Methods for generating electricity and for performing electrolysis include flowing current through a conductive current collector having a varying cross-sectional area.

Hawkes, Grant L.; Herring, James S.; Stoots, Carl M.; O& #x27; Brien, James E.

2013-03-05T23:59:59.000Z

63

Through-the-electrode model of a proton exchange membrane fuel cell with independently measured parameters  

DOE Green Energy (OSTI)

A one dimensional model for a proton exchange membrane fuel cell was developed which makes use of independently measured parameters for predicting single cell performance. Optimization of catalyst layer formulation and properties are explored. Impact of temperature and cathode pressure upon system performance was investigated.

Weisbrod, K.R.; Grot, S.A.; Vanderborgh, N.E.

1995-05-01T23:59:59.000Z

64

Through-the-electrode model of a proton exchange membrane fuel cell with independently measured parameters  

DOE Green Energy (OSTI)

A one dimensional model for a proton exchange membrane fuel cell was developed which makes use of independently measured parameters for predicting single cell performance. Optimization of catalyst layer formulation and properties are explored. Impact of temperature and cathode pressure upon system performance is investigated.

Weisbrod, K.R.; Grot, S.A.; Vandergborgh, N.E.

1995-09-01T23:59:59.000Z

65

NOVEL ELECTRODE MATERIALS FOR LOW-TEMPERATURE SOLID-OXIDE FUEL CELLS  

DOE Green Energy (OSTI)

Composite electrodes consisting of silver and bismuth vanadates exhibit remarkable catalytic activity for oxygen reduction at 500-550 C and greatly reduce the cathode-electrolyte (doped ceria) resistances of low temperature SOFCs, down to about 0.53 {Omega}cm{sup 2} at 500 C and 0.21 {Omega}cm{sup 2} at 550 C. The observed power densities of 231, 332, and 443 mWcm{sup -2} at 500, 525 and 550 C, respectively, make it possible to operate SOFCs at temperatures about 500 C. Using in situ potential dependent FTIR emission spectroscopy, we have found evidence for two, possibly three distinct di-oxygen species present on the electrode surface. We have successfully identified which surface oxygen species is present under a particular electrical or chemical condition and have been able to deduce the reaction mechanisms. This technique will be used to probe the gas-solid interactions at or near the TPB and on the surfaces of mixed-conducting electrodes in an effort to understand the molecular processes relevant to the intrinsic catalytic activity. Broad spectral features are assigned to the polarization-induced changes in the optical properties of the electrode surface layer. The ability of producing vastly different microstructures and morphologies of the very same material is critical to the fabrication of functionally graded electrodes for solid-state electrochemical devices, such as SOFCs and lithium batteries. By carefully adjusting deposition parameters of combustion CVD, we have successfully produced oxide nano-powders with the size of 30 {approx} 200 nm. Porous films with various microstructures and morphologies are also deposited on several substrates by systematic adjustment of deposition parameters. Symmetrical cells were fabricated by depositing cathode materials on both sides of GDC electrolytes.

X. Lu; C. Xia; Y. Liu; W. Rauch; M. Liu

2002-12-01T23:59:59.000Z

66

Air Breathing Direct Methanol Fuel Cell  

DOE Patents (OSTI)

A method for activating a membrane electrode assembly for a direct methanol fuel cell is disclosed. The method comprises operating the fuel cell with humidified hydrogen as the fuel followed by running the fuel cell with methanol as the fuel.

Ren; Xiaoming (Los Alamos, NM)

2003-07-22T23:59:59.000Z

67

LOW-TEMPERATURE, ANODE-SUPPORTED HIGH POWER DENSITY SOLID OXIDE FUEL CELLS WITH NANOSTRUCTURED ELECTRODES  

DOE Green Energy (OSTI)

Anode-supported solid oxide fuel cells with Ni + yttria-stabilized zirconia (YSZ) anode, YSZ-samaria-doped ceria (SDC) bi-layer electrolyte and Sr-doped LaCoO{sub 3} (LSC) + SDC cathode were fabricated. Fuel used consisted of H{sub 2} diluted with He, N{sub 2}, H{sub 2}O or CO{sub 2}, mixtures of H{sub 2} and CO, and mixtures of CO and CO{sub 2}. Cell performance was measured at 800 C with above-mentioned fuel gas mixtures and air as oxidant. For a given concentration of the diluent, the cell performance was higher with He as the diluent than with N{sub 2} as the diluent. Mass transport through porous Ni-YSZ anode for H{sub 2}-H{sub 2}O, CO-CO{sub 2} binary systems and H{sub 2}-H{sub 2}O-diluent gas ternary systems was analyzed using multicomponent gas diffusion theory. At high concentrations of the diluent, the maximum achievable current density was limited by the anodic concentration polarization. From this measured limiting current density, the corresponding effective gas diffusivity was estimated. Highest effective diffusivity was estimated for fuel gas mixtures containing H{sub 2}-H{sub 2}O-He mixtures ({approx}0.34 cm{sup 2}/s), and the lowest for CO-CO{sub 2} mixtures ({approx}0.07 cm{sup 2}/s). The lowest performance was observed with CO-CO{sub 2} mixture as a fuel, which in part was attributed to the lowest effective diffusivity of the fuels tested.

Anil V. Virkar

2001-09-26T23:59:59.000Z

68

NOVEL ELECTRODE MATERIALS FOR LOW-TEMPERATURE SOLID-OXIDE FUEL CELLS  

DOE Green Energy (OSTI)

Fuel cell performance depends strongly on the anode microstructure, which is determined by the anode compositions and fabrication conditions. Four types of anodes with two kinds of NiO and GDC powders were investigated. By carefully adjusting the anode microstructure, the GDC electrolyte/anode interfacial polarization resistances reduced dramatically. The interfacial resistance at 600 C decreased from 1.61 {Omega} cm{sup 2} for the anodes prepared using commercially available powders to 0.06 {Omega} cm{sup 2} for those prepared using powders derived from a glycine-nitrate process. The critical issues facing the development of economically competitive SOFC systems include lowering the operation temperature and creating novel anode materials and microstructures capable of efficiently utilizing hydrocarbon fuels. Anode-supported SOFCs with an electrolyte of 20 {micro}m- thick Gd-doped ceria (GDC) were fabricated by co-pressing, and both Ni- and Cu-based anodes were prepared by a solution impregnation process. At 600 C, SOFCs fueled with humidified H{sub 2}, methane, and propane, reached peak power densities of 602, 519, and 433 mW/cm{sup 2}, respectively. Both microstructure and composition of the anodes, as fabricated using a solution impregnation technique, greatly influence fuel cell performance. Although steam reforming or partial oxidation is effective in avoiding carbon deposition of hydrocarbon fuels, it increases the operating cost and reduces the energy efficiency. A catalyst (1 %wt Pt dispersed on porous Gd-doped ceria) for pre-reforming of propane was developed with relatively low steam to carbon (S/C) ratio ({approx}0.5), coupled with direct utilization of the reformate in low-temperature SOFCs. Propane was converted to smaller molecules during pre-reforming, including H{sub 2}, CH{sub 4}, CO, and CO{sub 2}. A peak power density of 247 mW/cm{sup 2} was observed when pre-reformed propane was directly fed to an SOFC operated at 600 C. No carbon deposition was observed in the fuel cell for a continuous operation of 10 hours at 600 C.

Shaowu Zha; Luis Aguilar; Meilin Liu

2003-12-01T23:59:59.000Z

69

Energy savings by means of fuel cell electrodes in electro-chemical industries. Progress report, August 1-October 31, 1978  

DOE Green Energy (OSTI)

Caustic half cells are described and data reported for tests run to evaluate the technology involved in the operation of air cathodes for the Caustic-Chlorine Industry. The majority of tests were run at 300 ASF in a 23% NaOH electrolyte at 75/sup 0/C with a CO/sub 2/ free air efficiency of 33%. Data are presented for a 7200-h life test which is in operation and represents the state of the art. Runs have been made to identify the limiting current density and air efficiency for the standard RA19 type air cathode. Also presented are tests involving cell temperature, electrode platinum variation and evaluation of several thin, porous, conducting substrates on which the catalyst layer is deposited during electrode fabrication. Technical data on advisory meetings and experimental cell design for hydrogen anode evaluation in the electrowinning of zinc were reported. Preliminary results demonstrate a savings of over 0.6 kWh/lb of zinc for 3 to 4 hours runs employing pure hydrogen as fuel and a 0.33 mg/cm/sup 2/ Pt anode. In the area of metal-water-air batteries a consultatory meeting was held, and the initial data obtained at Lawrence Livermore Laboratory for a standard Prototech Company air cathode in an Aluminum-Air Battery were reported to be most encouraging.

Allen, R.J.; Juda, W.; Lindstrom, R.W.

1978-12-01T23:59:59.000Z

70

PEM/SPE fuel cell  

DOE Patents (OSTI)

A PEM/SPE fuel cell is described including a membrane-electrode assembly (MEA) having a plurality of oriented filament embedded the face thereof for supporting the MEA and conducting current therefrom to contiguous electrode plates. 4 figs.

Grot, S.A.

1998-01-13T23:59:59.000Z

71

PEM/SPE fuel cell  

DOE Patents (OSTI)

A PEM/SPE fuel cell including a membrane-electrode assembly (MEA) having a plurality of oriented filament embedded the face thereof for supporting the MEA and conducting current therefrom to contiguous electrode plates.

Grot, Stephen Andreas (Henrietta, NY)

1998-01-01T23:59:59.000Z

72

Fuel Cell Technologies Office: Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Cells Search Search Help Fuel Cells EERE Fuel Cell Technologies Office Fuel Cells Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Fuel...

73

NREL: Learning - Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells Fuel cells and their ability to cleanly produce electricity from hydrogen and oxygen are what make hydrogen attractive as a "fuel" for transportation use particularly, but also as a general energy carrier for homes and other uses, and for storing and transporting otherwise intermittent renewable energy. Fuel cells function somewhat like a battery-with external fuel being supplied rather than stored electricity-to generate power by chemical reaction rather than combustion. Hydrogen fuel cells, for instance, feed hydrogen gas into an electrode that contains a catalyst, such as platinum, which helps to break up the hydrogen molecules into positively charged hydrogen ions and negatively charged electrons. The electrons flow from the electrode to a terminal that

74

Double interconnection fuel cell array  

DOE Patents (OSTI)

A fuel cell array (10) is made, containing number of tubular, elongated fuel cells (12) which are placed next to each other in rows (A, B, C, D), where each cell contains inner electrodes (14) and outer electrodes (18 and 18'), with solid electrolyte (16 and 16') between the electrodes, where the electrolyte and outer electrode are discontinuous, having two portions, and providing at least two opposed discontinuities which contain at least two oppositely opposed interconnections (20 and 20') contacting the inner electrode (14), each cell (12) having only three metallic felt electrical connectors (22) which contact surrounding cells, where each row is electrically connected to the other.

Draper, Robert (Churchill Boro, PA); Zymboly, Gregory E. (Murrysville, PA)

1993-01-01T23:59:59.000Z

75

Ice electrode electrolytic cell  

DOE Patents (OSTI)

This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

Glenn, David F. (Idaho Falls, ID); Suciu, Dan F. (Idaho Falls, ID); Harris, Taryl L. (Idaho Falls, ID); Ingram, Jani C. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

76

Ice electrode electrolytic cell  

DOE Patents (OSTI)

This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

Glenn, D.F.; Suciu, D.F.; Harris, T.L.; Ingram, J.C.

1993-04-06T23:59:59.000Z

77

Ice electrode electrolytic cell  

DOE Patents (OSTI)

This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

Glenn, D.F.; Suciu, D.F.; Harris, T.L.; Ingram, J.C.

1992-12-31T23:59:59.000Z

78

Fuel Cells Team  

NLE Websites -- All DOE Office Websites (Extended Search)

Judith Valerio at one of our 31 single-cell test stands Fuel Cell Team The FC team focus is R&D on polymer electrolyte membrane (PEM) fuel cells for commercial and military applications. Our program has had ongoing funding in the area of polymer electrolyte fuel cells since 1977 and has been responsible for enabling breakthroughs in the areas of thin film electrodes and air bleed for CO tolerance. For more information on the history of fuel cell research at Los Alamos, please click here. Fuel cells are an important enabling technology for the Hydrogen Economy and have the potential to revolutionize the way we power the nation and the world. The FC team is exploring the potential of fuel cells as energy-efficient, clean, and fuel-flexible alternatives that will

79

Fuel Cell Technologies Office: Fuel Cells  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Efficiency and Renewable Energy EERE Home | Programs & Offices | Consumer Information Fuel Cells Search Search Help Fuel Cells EERE Fuel Cell Technologies Office Fuel Cells...

80

Rapidly refuelable fuel cell  

DOE Patents (OSTI)

This invention is directed to a metal-air fuel cell where the consumable metal anode is movably positioned in the cell and an expandable enclosure, or bladder, is used to press the anode into contact with separating spacers between the cell electrodes. The bladder may be depressurized to allow replacement of the anode when consumed.

Joy, Richard W. (Santa Clara, CA)

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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81

Fuel Cells publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science » Materials Science » Fuel Cells » Fuel Cells Publications Fuel Cells publications Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this century. Get Expertise Melissa Fox Applied Energy Email Catherine Padro Sensors & Electorchemical Devices Email Fernando Garzon Sensors & Electorchemical Devices Email Piotr Zelenay Sensors & Electorchemical Devices Email Rod Borup Sensors & Electorchemical Devices Email Karen E. Kippen Chemistry Communications Email Like a battery, a fuel cell consists of two electrodes separated by an electrolyte-in polymer electrolyte fuel cells, the separator is made of a thin polymeric membrane. Unlike a battery, a fuel cell does not need recharging-it continues to produce electricity as long as fuel flows

82

Conditioning effects on La1-xSrxMnO3-Yttria stabilized Zirconia electrodes for thin-film solid oxide fuel cells  

DOE Green Energy (OSTI)

Composite cathodes of 50/50 vol percent LSM-YSZ (La1-xSrxMnO3-yttria stabilized zirconia) were deposited onto dense YSZ electrolytes by a colloidal deposition technique. The cathode characteristics were then examined by scanning electron microscopy (SEM) and studied by an impedance spectroscopy (IS). Conditioning effects of the LSM-YSZ cathodes were seen, and remedies for these effects were proposed for improving the performance of a solid oxide fuel cell (SOFC). LSM surface contamination and modification, cathode bonding to the YSZ electrolyte, changing Pt electrode and bonding paste, and curvature of sintered YSZ electrolytes led to some changes in microstructure and variability in cell performances.

Lee, You-Kee; Kim, Jung-Yeul; Lee, Young-Ki; Kim, Insoo; Moon, Hee-Soo; Park, Jong-Wan; Jacobson, Craig P.; Visco, Steven J.

2002-12-06T23:59:59.000Z

83

Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells Converting chemical energy of hydrogenated fuels into electricity Project Description Invented in 1839, fuels cells powered the Gemini and Apollo space missions, as well as the space shuttle. Although fuel cells have been successfully used in such applications, they have proven difficult to make more cost-effective and durable for commercial applications, particularly for the rigors of daily transportation. Since the 1970s, scientists at Los Alamos have managed to make various scientific breakthroughs that have contributed to the development of modern fuel cell systems. Specific efforts include the following: * Finding alternative and more cost-effective catalysts than platinum. * Enhancing the durability of fuel cells by developing advanced materials and

84

Composite fuel cell membranes  

DOE Patents (OSTI)

A bilayer or trilayer composite ion exchange membrane is described suitable for use in a fuel cell. The composite membrane has a high equivalent weight thick layer in order to provide sufficient strength and low equivalent weight surface layers for improved electrical performance in a fuel cell. In use, the composite membrane is provided with electrode surface layers. The composite membrane can be composed of a sulfonic fluoropolymer in both core and surface layers.

Plowman, K.R.; Rehg, T.J.; Davis, L.W.; Carl, W.P.; Cisar, A.J.; Eastland, C.S.

1997-08-05T23:59:59.000Z

85

Fuel Cell Technologies Office: Fuel Cell Animation  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Animation to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Animation on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Animation on...

86

Electrode for a lithium cell  

SciTech Connect

This invention relates to a positive electrode for an electrochemical cell or battery, and to an electrochemical cell or battery; the invention relates more specifically to a positive electrode for a non-aqueous lithium cell or battery when the electrode is used therein. The positive electrode includes a composite metal oxide containing AgV.sub.3O.sub.8 as one component and one or more other components consisting of LiV.sub.3O.sub.8, Ag.sub.2V.sub.4O.sub.11, MnO.sub.2, CF.sub.x, AgF or Ag.sub.2O to increase the energy density of the cell, optionally in the presence of silver powder and/or silver foil to assist in current collection at the electrode and to improve the power capability of the cell or battery.

Thackeray, Michael M. (Naperville, IL); Vaughey, John T. (Elmhurst, IL); Dees, Dennis W. (Downers Grove, IL)

2008-10-14T23:59:59.000Z

87

Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells The Solid State Energy Conversion Alliance (SECA) program is responsible for coordinating Federal efforts to facilitate development of a commercially relevant and robust solid oxide fuel cell (SOFC) system. Specific objectives include achieving an efficiency of greater than 60 percent, meeting a stack cost target of $175 per kW, and demonstrating lifetime performance degradation of less than 0.2 percent per

88

Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE))

Fuel cells are an emerging technology that can provide heat and electricity for buildings and electrical power for vehicles and electronic devices.

89

Fuel Cell Membrane Electrode Assembly Manufacturing R&D - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

7 7 FY 2012 Annual Progress Report DOE Hydrogen and Fuel Cells Program Michael Ulsh (Primary Contact), Guido Bender, Niccolo Aieta, Huyen Dinh National Renewable Energy Laboratory 15013 Denver West Parkway Golden, CO 80401 Phone: (303) 275-3842 Email: michael.ulsh@nrel.gov DOE Manager HQ: Nancy Garland Phone: (202) 586-5673 Email: Nancy.Garland@ee.doe.gov Partners: * Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA * Colorado School of Mines, Golden, CO * University of Hawaii, Hawaii Natural Energy Institute, Honolulu, HI * Rensselaer Polytechnic Institute, Troy, NY

90

Improved photovoltaic cells and electrodes  

DOE Patents (OSTI)

Improved photovoltaic cells and electrodes for use therein, particularly electrodes employing amorphous silicon or polyacetylene coating are produced by a process which includes filling pinholes or porous openings in the coatings by electrochemical oxidation of selected monomers to deposit insulating polymer in the openings.

Skotheim, T.A.

1983-06-29T23:59:59.000Z

91

Electrochemical photovoltaic cells and electrodes  

DOE Patents (OSTI)

Improved electrochemical photovoltaic cells and electrodes for use therein, particularly electrodes employing amorphous silicon or polyacetylene coating are produced by a process which includes filling pinholes or porous openings in the coatings by electrochemical oxidation of selected monomers to deposit insulating polymer in the openings.

Skotheim, Terje A. (East Patchogue, NY)

1984-01-01T23:59:59.000Z

92

Methods of Conditioning Direct Methanol Fuel Cells  

while the catalyst on the anode surface is reduced. Surface oxides on the direct methanol fuel cell anode catalyst of the membrane electrode assembly are thereby reduced.

93

A Damage Model for Degradation in the Electrodes of solid oxide fuel cells: Modeling the effects of sulfur and antimony in the anode  

Science Conference Proceedings (OSTI)

Over their designed lifetime, high temperature electrochemical devices, such as solid oxide fuel cells (SOFCs), can experience degradation in their electrochemical performance due to environmental conditions, operating conditions, contaminants, and other factors. Understanding the different degradation mechanisms in SOFCs and other electrochemical devices is essential to reducing performance degradation and increasing the lifetime of these devices. In this paper SOFC degradation mechanisms are discussed and a damage model is presented which describes performance degradation in SOFCs due to damage or degradation in the electrodes of the SOFC. A degradation classification scheme is presented that divides the various SOFC electrode degradation mechanisms into categories based on their physical effects on the SOFC. The application of the damage model and the classification method is applied to sulfur poisoning and antimony poisoning which occur in the anode of SOFCs. For sulfur poisoning the model is able to predict the degradation in SOFC performance based on the operating temperature and voltage of the fuel cell and the concentration of gaseous sulfur species in the anode. For antimony poisoning the effects of nickel removal from the anode matrix is investigated.

Ryan, Emily M.; Xu, Wei; Sun, Xin; Khaleel, Mohammad A.

2012-07-15T23:59:59.000Z

94

Fuel cell system for transportation applications  

DOE Patents (OSTI)

A propulsion system is described for a vehicle having pairs of front and rear wheels and a fuel tank. An electrically driven motor having an output shaft operatively connected to at least one of said pair of wheels is connected to a fuel cell having a positive electrode and a negative electrode separated by an electrolyte for producing dc power to operate the motor. A partial oxidation reformer is connected both to the fuel tank and to the fuel cell and receives hydrogen-containing fuel from the fuel tank and uses water and air for partially oxidizing and reforming the fuel in the presence of an oxidizing catalyst and a reforming catalyst to produce a hydrogen-containing gas. The hydrogen-containing gas is sent from the partial oxidation reformer to the fuel cell negative electrode while air is transported to the fuel cell positive electrode to produce dc power for operating the electric motor. 3 figures.

Kumar, R.; Ahmed, S.; Krumpelt, M.; Myles, K.M.

1993-09-28T23:59:59.000Z

95

Fuel cell system for transportation applications  

DOE Patents (OSTI)

A propulsion system for a vehicle having pairs of front and rear wheels and a fuel tank. An electrically driven motor having an output shaft operatively connected to at least one of said pair of wheels is connected to a fuel cell having a positive electrode and a negative electrode separated by an electrolyte for producing dc power to operate the motor. A partial oxidation reformer is connected both to the fuel tank and to the fuel cell receives hydrogen-containing fuel from the fuel tank and water and air and for partially oxidizing and reforming the fuel with water and air in the presence of an oxidizing catalyst and a reforming catalyst to produce a hydrogen-containing gas. The hydrogen-containing gas is sent from the partial oxidation reformer to the fuel cell negative electrode while air is transported to the fuel cell positive electrode to produce dc power for operating the electric motor.

Kumar, Romesh (Naperville, IL); Ahmed, Shabbir (Evanston, IL); Krumpelt, Michael (Naperville, IL); Myles, Kevin M. (Downers Grove, IL)

1993-01-01T23:59:59.000Z

96

Improved fuel cell system for transportation applications  

DOE Patents (OSTI)

This invention is comprised of a propulsion system for a vehicle having pairs of front and rear wheels and a fuel tank. An electrically driven motor having an output shaft operatively connected to at least one of said pair of wheels is connected to a fuel cell having a positive electrode and a negative electrode separated by an electrolyte for producing dc power to operate the motor. A partial oxidation reformer is connected both to the fuel tank and to the fuel cell receives hydrogen-containing fuel from the fuel tank and water and air and for partially oxidizing and reforming the fuel with water and air in the presence of an oxidizing catalyst and a reforming catalyst to produce a hydrogen-containing gas. The hydrogen-containing gas is sent from the partial oxidation reformer to the fuel cell negative electrode while air is transported to the fuel cell positive electrode to produce dc power for operating the electric motor.

Kumar, R.; Ahmed, S.; Krumpelt, M.; Myles, M.K.

1991-12-31T23:59:59.000Z

97

Methods of Conditioning Direct Methanol Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Methods of Conditioning Direct Methanol Fuel Cells Methods of Conditioning Direct Methanol Fuel Cells Methods of Conditioning Direct Methanol Fuel Cells Methods for conditioning the membrane electrode assembly of a direct methanol fuel cell ("DMFC") are disclosed. Available for thumbnail of Feynman Center (505) 665-9090 Email Methods of Conditioning Direct Methanol Fuel Cells Methods for conditioning the membrane electrode assembly of a direct methanol fuel cell ("DMFC") are disclosed. In a first method, an electrical current of polarity opposite to that used in a functioning direct methanol fuel cell is passed through the anode surface of the membrane electrode assembly. In a second method, methanol is supplied to an anode surface of the membrane electrode assembly, allowed to cross over the polymer

98

Extended, Continuous Pt Nanostructures in Thick, Dispersed Electrodes - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

7 7 FY 2012 Annual Progress Report DOE Hydrogen and Fuel Cells Program Bryan Pivovar (Primary Contact), Shyam Kocha, KC Neyerlin, Jason Zack, Shaun Alia, Arrelaine Dameron, Tim Olson, Svitlana Pylypenko, Justin Bult, Brian Larsen, Jeremy Leong, Niccolo Aieta, Guido Bender National Renewable Energy Laboratory (NREL) 15013 Denver West Parkway Golden, CO 80401 Phone: (303) 275-3809 Email: Bryan.Pivovar@nrel.gov DOE Manager HQ: Kathi Epping Martin Phone: (202) 586-7425 Email: Kathi.Epping@ee.doe.gov Subcontractors: * Kelly Perry, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN * Rod Borup, Los Alamos National Laboratory (LANL), Los Alamos, NM * Yushan Yan, University of Delaware, Newark, DE

99

Ambient pressure fuel cell system  

DOE Patents (OSTI)

An ambient pressure fuel cell system is provided with a fuel cell stack formed from a plurality of fuel cells having membrane/electrode assemblies (MEAs) that are hydrated with liquid water and bipolar plates with anode and cathode sides for distributing hydrogen fuel gas and water to a first side of each one of the MEAs and air with reactant oxygen gas to a second side of each one of the MEAs. A pump supplies liquid water to the fuel cells. A recirculating system may be used to return unused hydrogen fuel gas to the stack. A near-ambient pressure blower blows air through the fuel cell stack in excess of reaction stoichiometric amounts to react with the hydrogen fuel gas.

Wilson, Mahlon S. (Los Alamos, NM)

2000-01-01T23:59:59.000Z

100

Fuel Cell Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Basics Basics Fuel Cell Basics August 14, 2013 - 2:09pm Addthis Photo of two hydrogen fuel cells. Fuel cells are an emerging technology that can provide heat and electricity for buildings and electrical power for vehicles and electronic devices. How Fuel Cells Work Fuel cells work like batteries, but they do not run down or need recharging. They produce electricity and heat as long as fuel is supplied. A fuel cell consists of two electrodes-a negative electrode (or anode) and a positive electrode (or cathode)-sandwiched around an electrolyte. A fuel, such as hydrogen, is fed to the anode, and air is fed to the cathode. Activated by a catalyst, hydrogen atoms separate into protons and electrons, which take different paths to the cathode. The electrons go through an external circuit, creating a flow of electricity. The protons

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

High Temperature Electrolysis using Electrode-Supported Cells  

DOE Green Energy (OSTI)

An experimental study is under way to assess the performance of electrode-supported solid-oxide cells operating in the steam electrolysis mode for hydrogen production. The cells currently under study were developed primarily for the fuel cell mode of operation. Results presented in this paper were obtained from single cells, with an active area of 16 cm2 per cell. The electrolysis cells are electrode-supported, with yttria-stabilized zirconia (YSZ) electrolytes (~10 m thick), nickel-YSZ steam/hydrogen electrodes (~1400 m thick), and manganite (LSM) air-side electrodes (~90 m thick). The purpose of the present study was to document and compare the performance and degradation rates of these cells in the fuel cell mode and in the electrolysis mode under various operating conditions. Initial performance was documented through a series of DC potential sweeps and AC impedance spectroscopy measurements. Degradation was determined through long-duration testing, first in the fuel cell mode, then in the electrolysis mode over more than 500 hours of operation. Results indicate accelerated degradation rates in the electrolysis mode compared to the fuel cell mode, possibly due to electrode delamination. The paper also includes details of the single-cell test apparatus developed specifically for these experiments.

J. E. O'Brien; C. M. Stoots

2010-07-01T23:59:59.000Z

102

Electrolyte reservoir for carbonate fuel cells  

DOE Patents (OSTI)

An electrode for a carbonate fuel cell and method of making same are described wherein a substantially uniform mixture of an electrode-active powder and porous ceramic particles suitable for a carbonate fuel cell are formed into an electrode with the porous ceramic particles having pores in the range of from about 1 micron to about 3 microns, and a carbonate electrolyte is in the pores of the ceramic particles.

Iacovangelo, C.D.; Shores, D.A.

1984-05-23T23:59:59.000Z

103

Electrolyte reservoir for carbonate fuel cells  

DOE Patents (OSTI)

An electrode for a carbonate fuel cell and method of making same wherein a substantially uniform mixture of an electrode-active powder and porous ceramic particles suitable for a carbonate fuel cell are formed into an electrode with the porous ceramic particles having pores in the range of from about 1 micron to about 3 microns, and a carbonate electrolyte is in the pores of the ceramic particles.

Iacovangelo, Charles D. (Schenectady, NY); Shores, David A. (Minneapolis, MN)

1985-01-01T23:59:59.000Z

104

Task 1: Modeling Study of CO Effects on Polymer Electrolyte Fuel Cell Anodes Task 2: Study of Ac Impedance as Membrane/Electrode Manufacturing Diagnostic Tool  

DOE Green Energy (OSTI)

Carbon monoxide poisoning of polymer electrolyte fuel cell anodes is a key problem to be overcome when operating a polymer electrolyte fuel cell (PEFC) on reformed fuels. CO adsorbs preferentially on the precious metal surface leading to substantial performance losses. Some recent work has explored this problem, primarily using various Pt alloys in attempts to lower the degree of surface deactivation. In their studies of hydrogen oxidation on Pt and Pt alloy (Pt/Sn, Pt/Ru) rotating disk electrodes exposed to H{sub 2}/CO mixtures, Gasteiger et al. showed that a small hydrogen oxidation current is observed well before the onset of major CO oxidative stripping (ca. 0.4 V) on Pt/Ru. However, these workers concluded that such current observed at low anode overpotentials was too low to be of practical value. Nonetheless, MST-11 researchers and others have found experimentally that it is possible to run a PEFC, e.g., with a Pt/Ru anode, in the presence of CO levels in the range 10--100 ppm with little voltage loss. Such experimental results suggest that, in fact, PEFC operation at significant current densities under low anode overpotentials is possible in the presence of such levels of CO, even before resorting to air bleeding into the anode feed stream. The latter approach has been shown to be effective in elimination of Pt anode catalyst poisoning effects at CO levels of 20--50 ppm for cells operating at 80 C with low Pt catalyst loading. The effect of oxygen bleeding is basically to lower P{sub CO} down to extremely low levels in the anode plenum thanks to the catalytic (chemical) oxidation of CO by dioxygen at the anode catalyst. In this modeling work the authors do not include specific description of oxygen bleeding effects and concentrate on the behavior of the anode with feed streams of H{sub 2} or reformate containing low levels of CO. The anode loss is treated in this work as a hydrogen and carbon monoxide electrode kinetics problem, but includes the effects of dilution of the feedstream with significant fractions of carbon dioxide and nitrogen and of mass transport losses in the gas diffusion backing. Not included in the anode model are ionic resistance and diffusion losses in the catalyst layer. They are looking to see if the overall pattern of polarization curves calculated based on such a purely kinetic model indeed mimics the central features of polarization curves observed for PEFCs operating on hydrogen with low levels of CO.

Thomas E. Springer

1998-01-30T23:59:59.000Z

105

Fuel Cell Technologies Office: Fuel Cell Animation  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Efficiency and Renewable Energy EERE Home | Programs & Offices | Consumer Information Fuel Cell Technologies Office Search Search Help Fuel Cell Technologies Office HOME ABOUT...

106

Aluminum reduction cell electrode  

DOE Patents (OSTI)

The invention is directed to cathode modules comprised of refractory hard metal materials, such as TiB[sub 2], for an electrolytic cell for the reduction of alumina wherein the modules may be installed and replaced during operation of the cell and wherein the structure of the cathode modules is such that the refractory hard metal materials are not subjected to externally applied forces or rigid constraints. 9 figs.

Goodnow, W.H.; Payne, J.R.

1982-09-14T23:59:59.000Z

107

Modeling of solid oxide fuel cells  

E-Print Network (OSTI)

A comprehensive membrane-electrode assembly (MEA) model of Solid Oxide Fuel Cell (SOFC)s is developed to investigate the effect of various design and operating conditions on the cell performance and to examine the underlying ...

Lee, Won Yong, S.M. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

108

Energy Basics: Fuel Cells  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydrogen Fuel Fuel Cells Hydropower Ocean Solar Wind Fuel Cells Photo of...

109

Aluminum reduction cell electrode  

DOE Patents (OSTI)

The invention is directed to an anode-cathode structure for an electrolytic cell for the reduction of alumina wherein the structure is comprised of a carbon anode assembly which straddles a wedge-shaped refractory hard metal cathode assembly having steeply sloped cathodic surfaces, each cathodic surface being paired in essentially parallel planar relationship with an anode surface. The anode-cathode structure not only takes into account the structural weakness of refractory hard metal materials but also permits the changing of the RHM assembly during operation of the cell. Further, the anode-cathode structure enhances the removal of anode gas from the interpolar gap between the anode and cathode surfaces. 10 figs.

Payne, J.R.

1983-09-20T23:59:59.000Z

110

Oxygen electrode in molten carbonate fuel cells. Ninth quarterly technical progress report, August 1, 1989--October 31, 1989  

DOE Green Energy (OSTI)

The oxygen reduction reaction on a gold electrode in lithium carbonate melt was investigated to determine the influence of partial pressure of carbon dioxide and temperature on electrode kinetics and oxygen solubility by using cyclic Voltammetry and impedance analysis techniques. During this quarter, the impedance data were analyzed by a Complex Nonlinear Least Square (CNLS) Parameter estimation program to determine the kinetic and the mass transfer related parameters such as charge transfer resistance, double layer capacitance, solution resistance, and Warburg coefficient. The estimated parameters were used to obtain the C0{sub 2} reaction orders and apparent activation energies for the exchange current density and the mass transfer parameter (D{sub o}{sup {1/2}}C{sub o}*).

Dave, B.B.; Srinivasan, S.; White, R.E.; Appleby, A.J.

1989-12-31T23:59:59.000Z

111

Method of fabricating electrode catalyst layers with directionally oriented carbon support for proton exchange membrane fuel cell  

DOE Patents (OSTI)

A membrane electrode assembly (MEA) of the invention comprises an anode and a cathode and a proton conductive membrane therebetween, the anode and the cathode each comprising a patterned sheet of longitudinally aligned transition metal-containing carbon nanotubes, wherein the carbon nanotubes are in contact with and are aligned generally perpendicular to the membrane, wherein a catalytically active transition metal is incorporated throughout the nanotubes.

Liu, Di-Jia (Naperville, IL); Yang, Junbing (Bolingbrook, IL)

2012-03-20T23:59:59.000Z

112

Fuel cell system with separating structure bonded to electrolyte  

DOE Patents (OSTI)

A fuel cell assembly comprises a separating structure configured for separating a first reactant and a second reactant wherein the separating structure has an opening therein. The fuel cell assembly further comprises a fuel cell comprising a first electrode, a second electrode, and an electrolyte interposed between the first and second electrodes, and a passage configured to introduce the second reactant to the second electrode. The electrolyte is bonded to the separating structure with the first electrode being situated within the opening, and the second electrode being situated within the passage.

Bourgeois, Richard Scott (Albany, NY); Gudlavalleti, Sauri (Albany, NY); Quek, Shu Ching (Clifton Park, NY); Hasz, Wayne Charles (Pownal, VT); Powers, James Daniel (Santa Monica, CA)

2010-09-28T23:59:59.000Z

113

Open end protection for solid oxide fuel cells  

DOE Patents (OSTI)

A solid oxide fuel cell (40) having a closed end (44) and an open end (42) operates in a fuel cell generator (10) where the fuel cell open end (42) of each fuel cell contains a sleeve (60, 64) fitted over the open end (42), where the sleeve (60, 64) extends beyond the open end (42) of the fuel cell (40) to prevent degradation of the interior air electrode of the fuel cell by fuel gas during operation of the generator (10).

Zafred, Paolo R. (Murrysville, PA); Dederer, Jeffrey T. (Valencia, PA); Tomlins, Gregory W. (Pittsburgh, PA); Toms, James M. (Irwin, PA); Folser, George R. (Lower Burrell, PA); Schmidt, Douglas S. (Pittsburgh, PA); Singh, Prabhakar (Export, PA); Hager, Charles A. (Zelienople, PA)

2001-01-01T23:59:59.000Z

114

Fuel Cell Technologies Office: Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

offering cleaner, more-efficient alternatives to the combustion of gasoline and other fossil fuels. Fuel cells have the potential to replace the internal-combustion engine in...

115

Layered electrode for electrochemical cells  

DOE Patents (OSTI)

There is provided an electrode structure comprising a current collector sheet and first and second layers of electrode material. Together, the layers improve catalyst utilization and water management.

Swathirajan, Swathy (West Bloomfield, MI); Mikhail, Youssef M. (Sterling Heights, MI)

2001-01-01T23:59:59.000Z

116

Gas fixation solar cell using gas diffusion semiconductor electrode  

SciTech Connect

A gas diffusion semiconductor electrode and solar cell and a process for gaseous fixation, such as nitrogen photoreduction, CO/sub 2/ photoreduction and fuel gas photo-oxidation are described. The gas diffusion photosensitive electrode has a central electrolyte porous matrix with an activated semiconductor material on one side adapted to be in contact with an electrolyte and a hydrophobic gas diffusion region on the opposite side adapted to be in contact with a supply of molecular gas.

Ang, P.G.; Sammells, A.F.

1980-12-23T23:59:59.000Z

117

Fuel Cell Links  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Links Fuel Cell Links The links below are provided as additional resources for fuel-cell-related information. Most of the linked sites are not part of, nor affiliated with, fueleconomy.gov. We do not endorse or vouch for the accuracy of the information found on such sites. Fuel Cell Vehicles and Manufacturers Chevrolet General Motors press release about the Chevrolet Fuel Cell Equinox Ford Ford overview of their hydrogen fuel cell vehicles Honda FCX Clarity official site Hyundai Hyundai press release announcing the upcoming Tucson Fuel Cell Mercedes-Benz Ener-G-Force Fuel-cell-powered concept SUV Nissan Nissan TeRRA concept SUV Toyota Overview of Toyota fuel cell technology Hydrogen- and Fuel-Cell-Related Information and Tools Fuel Cell Vehicles Brief overview of fuel cell vehicles provided by DOE's Alternative Fuels Data Center (AFDC)

118

Method of fabricating electrode catalyst layers with directionally oriented carbon support for proton exchange membrane fuel cell  

DOE Patents (OSTI)

A method of making a membrane electrode assembly (MEA) having an anode and a cathode and a proton conductive membrane there between. A bundle of longitudinally aligned carbon nanotubes with a catalytically active transition metal incorporated in the nanotubes forms at least one portion of the MEA and is in contact with the membrane. A combination selected from one or more of a hydrocarbon and an organometallic compound containing an catalytically active transition metal and a nitrogen containing compound and an inert gas and a reducing gas is introduced into a first reaction zone maintained at a first reaction temperature for a time sufficient to vaporize material therein. The vaporized material is transmitted to a second reaction zone maintained at a second reaction temperature for a time sufficient to grow longitudinally aligned carbon nanotubes with a catalytically active transition metal incorporated throughout the nanotubes. The nanotubes are in contact with a portion of the MEA at production or being positioned in contact thereafter. Methods of forming a PEMFC are also disclosed.

Liu, Di-Jia (Naperville, IL); Yang, Junbing (Willow brook, IL)

2010-07-20T23:59:59.000Z

119

Corrugated Membrane Fuel Cell Structures  

DOE Green Energy (OSTI)

By corrugating the fuel cell membrane electrode structure, Ion Power?s goal is to realize both the Pt utilization targets as well as the power density targets of the DOE. This will be achieved by demonstrating a fuel cell single cell (50 cm2) with a twofold increase in the membrane active area over the geometric area of the cell by corrugating the MEA structure. The corrugating structure must be able to demonstrate the target properties of < 10 mOhm-cm2 electrical resistance at > 20 psi compressive strength over the active area, in combination with offering at least 80% of power density that can be achieved by using the same MEA in a flat plate structure. Corrugated membrane fuel cell structures also have the potential to meet DOE power density targets by essentially packaging more membrane area into the same fuel cell volume as compared to conventional stack constructions.

Grot, Stephen [President, Ion Power Inc.

2013-09-30T23:59:59.000Z

120

Gradient Porous Composite Membrane for Fuel Cell Applications  

The heart of current polymer electrolyte fuel cells are the membrane electrode assemblies (MEA), which are composed of (i) an ionomer polymer membrane ...

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

IN SITU STUDIES OF FUEL CELL INTERFACES USING ...  

Science Conference Proceedings (OSTI)

... to in situ measurement of operating fuel cell interfaces from two studies: Ambient-Pressure XPS (APXPS) measurements of SOFC gas/electrode ...

122

Interfacial material for solid oxide fuel cell  

DOE Patents (OSTI)

Solid oxide fuel cells having improved low-temperature operation are disclosed. In one embodiment, an interfacial layer of terbia-stabilized zirconia is located between the air electrode and electrolyte of the solid oxide fuel cell. The interfacial layer provides a barrier which controls interaction between the air electrode and electrolyte. The interfacial layer also reduces polarization loss through the reduction of the air electrode/electrolyte interfacial electrical resistance. In another embodiment, the solid oxide fuel cell comprises a scandia-stabilized zirconia electrolyte having high electrical conductivity. The scandia-stabilized zirconia electrolyte may be provided as a very thin layer in order to reduce resistance. The scandia-stabilized electrolyte is preferably used in combination with the terbia-stabilized interfacial layer. The solid oxide fuel cells are operable over wider temperature ranges and wider temperature gradients in comparison with conventional fuel cells.

Baozhen, Li (Essex Junction, VT); Ruka, Roswell J. (Pittsburgh, PA); Singhal, Subhash C. (Murrysville, PA)

1999-01-01T23:59:59.000Z

123

NETL: Fuel Cells - Contacts  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel CellsSolid State Energy Conversion Alliance (SECA) Contacts For information on the Fuel CellsSECA program, contact: Fuel Cells Technology Manager: Shailesh Vora 412-386-7515...

124

Energy Basics: Fuel Cells  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

EERE: Energy Basics Fuel Cells Photo of two hydrogen fuel cells. Fuel cells are an emerging technology that can provide heat and electricity for buildings and electrical power for...

125

Hydrogen Fuel Cell Vehicles  

E-Print Network (OSTI)

Operation of a Solid Polymer Fuel Cell: A Parametric Model,"1991). G. Bronoel, "Hydrogen-Air Fuel Cells Without PreciousG. Abens, "Development of a Fuel Cell Power Source for Bus,"

Delucchi, Mark

1992-01-01T23:59:59.000Z

126

Alternative flow-field and backing concepts for polymer electrolyte fuel cells  

DOE Green Energy (OSTI)

New concepts for potentially low cost flow-field and electrode backing components for polymer electrolyte fuel cells are investigated.

Wilson, M.S.; Springer, T.E.; Davey, J.R.; Gottesfeld, S.

1995-09-01T23:59:59.000Z

127

Fuel Cell Technologies Office: Reversible Fuel Cells Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Reversible Fuel Cells Reversible Fuel Cells Workshop to someone by E-mail Share Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Facebook Tweet about Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Twitter Bookmark Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Google Bookmark Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Delicious Rank Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Digg Find More places to share Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings Annual Merit Review Proceedings Workshop & Meeting Proceedings

128

Chalcogen catalysts for polymer electrolyte fuel cell  

DOE Patents (OSTI)

A methanol-tolerant cathode catalyst and a membrane electrode assembly for fuel cells that includes such a cathode catalyst. The cathode catalyst includes a support having at least one transition metal in elemental form and a chalcogen disposed on the support. Methods of making the cathode catalyst and membrane electrode assembly are also described.

Zelenay, Piotr (Los Alamos, NM); Choi, Jong-Ho (Los Alamos, NM); Alonso-Vante, Nicolas (France, FR); Wieckowski, Andrzej (Champaign, IL); Cao, Dianxue (Urbana, IL)

2010-08-24T23:59:59.000Z

129

Air Breathing Direct Methanol Fuel Cell  

NLE Websites -- All DOE Office Websites (Extended Search)

Air Breathing Direct Methanol Fuel Cell Air Breathing Direct Methanol Fuel Cell Air Breathing Direct Methanol Fuel Cell An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol source. Available for thumbnail of Feynman Center (505) 665-9090 Email Air Breathing Direct Methanol Fuel Cell An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol

130

FCT Fuel Cells: Fuel Cell R&D Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell R&D Activities to someone by E-mail Share FCT Fuel Cells: Fuel Cell R&D Activities on Facebook Tweet about FCT Fuel Cells: Fuel Cell R&D Activities on Twitter Bookmark...

131

Preventing CO poisoning in fuel cells  

DOE Patents (OSTI)

Proton exchange membrane (PEM) fuel cell performance with CO contamination of the H.sub.2 fuel stream is substantially improved by injecting O.sub.2 into the fuel stream ahead of the fuel cell. It is found that a surface reaction occurs even at PEM operating temperatures below about 100.degree. C. to oxidatively remove the CO and restore electrode surface area for the H.sub.2 reaction to generate current. Using an O.sub.2 injection, a suitable fuel stream for a PEM fuel cell can be formed from a methanol source using conventional reforming processes for producing H.sub.2.

Gottesfeld, Shimshon (Los Alamos, NM)

1990-01-01T23:59:59.000Z

132

Fuel Cell Technologies Office: Fuel Cell Technical Publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Cell Technical Cell Technical Publications to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technical Publications on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technical Publications on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technical Publications on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technical Publications on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technical Publications on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technical Publications on AddThis.com... Publications Program Publications Technical Publications Hydrogen Fuel Cells Safety, Codes & Standards Market Analysis Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings

133

Method of making straight fuel cell tubes  

DOE Patents (OSTI)

A method and an apparatus for making straight fuel cell tubes are disclosed. Extruded tubes comprising powders of fuel cell material and a solvent are dried by rotating the extruded tubes. The rotation process provides uniform circumferential drying which results in uniform linear shrinkage of the tubes. The resultant dried tubes are very straight, thereby eliminating subsequent straightening steps required with conventional processes. The method is particularly useful for forming inner air electrode tubes of solid oxide fuel cells.

Borglum, Brian P. (Edgewood, PA)

2001-01-01T23:59:59.000Z

134

Composite electrode for use in electrochemical cells  

DOE Patents (OSTI)

A porous composite electrode for use in electrochemical cells. The electrode has a first face and a second face defining a relatively thin section therebetween. The electrode is comprised of an ion conducting material, an electron conducting material, and an electrocatalyst. The volume concentration of the ion conducting material is greatest at the first face and is decreased across the section, while the volume concentration of the electron conducting material is greatest at the second face and decreases across the section of the electrode. Substantially all of the electrocatalyst is positioned within the electrode section in a relatively narrow zone where the rate of electron transport of the electrode is approximately equal to the rate of ion transport of the electrode.

Vanderborgh, Nicholas E. (Los Alamos, NM); Huff, James R. (Los Alamos, NM); Leddy, Johna (Flushing, NY)

1989-01-01T23:59:59.000Z

135

Composite electrode for use in electrochemical cells  

DOE Patents (OSTI)

A porous composite electrode for use in electrochemical cells. The electrode has a first face and a second face defining a relatively thin section therebetween. The electrode is comprised of an ion conducting material, an electron conducting material, and an electrocatalyst. The volume concentration of the ion conducting material is greatest at the first face and is decreased across the section, while the volume concentration of the electron conducting material is greatest at the second face and decreases across the section of the electrode. Substantially all of the electrocatalyst is positioned within the electrode section in a relatively narrow zone where the rate of electron transport of the electrode is approximately equal to the rate of ion transport of the electrode. 4 figs., 1 tab.

Vanderborgh, N.E.; Huff, J.R.; Leddy, J.

1987-10-16T23:59:59.000Z

136

A fuel cell overview  

SciTech Connect

This paper is an overview of the fuel cell as an efficient and environmentally benign energy conversion technology. The topics of the paper include their physical arrangement, types of fuel cells, status of commercial development, applications of the fuel cell power plants and comparison with existing alternatives, and good design practice for fuel cell safety.

Krumpelt, M. [Argonne National Lab., IL (United States); Reiser, C.

1994-10-01T23:59:59.000Z

137

Fuel cells seminar  

SciTech Connect

This year`s meeting highlights the fact that fuel cells for both stationary and transportation applications have reached the dawn of commercialization. Sales of stationary fuel cells have grown steadily over the past 2 years. Phosphoric acid fuel cell buses have been demonstrated in urban areas. Proton-exchange membrane fuel cells are on the verge of revolutionizing the transportation industry. These activities and many more are discussed during this seminar, which provides a forum for people from the international fuel cell community engaged in a wide spectrum of fuel cell activities. Discussions addressing R&D of fuel cell technologies, manufacturing and marketing of fuel cells, and experiences of fuel cell users took place through oral and poster presentations. For the first time, the seminar included commercial exhibits, further evidence that commercial fuel cell technology has arrived. A total of 205 papers is included in this volume.

1996-12-01T23:59:59.000Z

138

Hydrogen & Fuel Cells - Fuel Cell - Solid Oxide  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrolyzer Research and Development Solid Oxide Fuel Cells Solid oxide diagram In an SOFC, oxygen from air is reduced to ions at the cathode, which diffuse through the...

139

FCT Fuel Cells: Basics  

NLE Websites -- All DOE Office Websites (Extended Search)

Basics to someone by E-mail Basics to someone by E-mail Share FCT Fuel Cells: Basics on Facebook Tweet about FCT Fuel Cells: Basics on Twitter Bookmark FCT Fuel Cells: Basics on Google Bookmark FCT Fuel Cells: Basics on Delicious Rank FCT Fuel Cells: Basics on Digg Find More places to share FCT Fuel Cells: Basics on AddThis.com... Home Basics Current Technology DOE R&D Activities Quick Links Hydrogen Production Hydrogen Delivery Hydrogen Storage Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts Basics Photo of a fuel cell stack A fuel cell uses the chemical energy of hydrogen to cleanly and efficiently produce electricity with water and heat as byproducts. (How much water?) Fuel cells are unique in terms of the variety of their potential applications; they can provide energy for systems as large as a utility

140

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

November 2012 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: November 2012 on Facebook Tweet about Fuel Cell Technologies...

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Newsletter Archives to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter Archives on Facebook Tweet about Fuel Cell Technologies...

142

Fuel Cell Technologies Office: Subscribe to the Fuel Cell Technologies...  

NLE Websites -- All DOE Office Websites (Extended Search)

Subscribe to the Fuel Cell Technologies Office Newsletter to someone by E-mail Share Fuel Cell Technologies Office: Subscribe to the Fuel Cell Technologies Office Newsletter on...

143

Fuel Cell Technologies Office: Fuel Cells for Portable Power...  

NLE Websites -- All DOE Office Websites (Extended Search)

for Portable Power Workshop to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cells for Portable Power Workshop on Facebook Tweet about Fuel Cell Technologies...

144

High temperature solid electrolyte fuel cell configurations and interconnections  

DOE Patents (OSTI)

High temperature fuel cell configurations and interconnections are made including annular cells having a solid electrolyte sandwiched between thin film electrodes. The cells are electrically interconnected along an elongated axial outer surface.

Isenberg, Arnold O. (Forest Hills, PA)

1984-01-01T23:59:59.000Z

145

Overview of Hydrogen and Fuel Cell Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

Activities Activities FUEL CELL TECHNOLOGIES PROGRAM HTAC Meeting Sunita Satyapal U.S. Department of Energy Fuel Cell Technologies Program Program Manager February 17, 2011 2 | Fuel Cell Technologies Program Source: US DOE 3/19/2013 eere.energy.gov * Overview - EERE Priorities * FY12 Budget * Examples of Collaboration & Leveraging Activities - Office of Science, DOD, DOT, SBIRs, International - Conferences and Workshops * Analysis Update * Recent HTAC Input & Future Needs Agenda 3 | Fuel Cell Technologies Program Source: US DOE 3/19/2013 eere.energy.gov High Impact Innovation Examples of Innovative Applied R&D Developed high surface area nanostructures for fuel cell electrodes that helped increase fuel cell power density and reduce fuel cell system cost by >45%

146

Fuel cells: A handbook (Revision 3)  

SciTech Connect

Fuel cells are electrochemical devices that convert the chemical energy of reaction directly into electrical energy. In a typical fuel cell, gaseous fuels are fed continuously to the anode (negative electrode) compartment and an oxidant (i.e., oxygen from air) is fed continuously to the cathode (positive electrode) compartment; the electrochemical reactions take place at the electrodes to produce an electric current. A fuel cell, although having similar components and several characteristics, differs from a typical battery in several respects. The battery is an energy storage device, that is, the maximum energy that is available is determined by the amount of chemical reactant stored within the battery itself. Thus, the battery will cease to produce electrical energy when the chemical reactants are consumed (i.e., discharged). In a secondary battery, the reactants are regenerated by recharging, which involves putting energy into the battery from an external source. The fuel cell, on the other hand, is an energy conversion device which theoretically has the capability of producing electrical energy for as long as the fuel and oxidant are supplied to the electrodes. In reality, degradation or malfunction of components limits the practical operating life of fuel cells.

Hirschenhofer, J.H.; Stauffer, D.B.; Engleman, R.R.

1994-01-01T23:59:59.000Z

147

Fuel Cell Technologies Office: News  

NLE Websites -- All DOE Office Websites (Extended Search)

Technologies Office: News on Twitter Bookmark Fuel Cell Technologies Office: News on Google Bookmark Fuel Cell Technologies Office: News on Delicious Rank Fuel Cell Technologies...

148

Fuel Cell Technologies Office: Webinars  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Webinars to someone by E-mail Share Fuel Cell Technologies Office: Webinars on Facebook Tweet about Fuel Cell Technologies Office: Webinars on Twitter Bookmark Fuel Cell...

149

Tubular screen electrical connection support for solid oxide fuel cells  

DOE Patents (OSTI)

A solid oxide fuel assembly is made of fuel cells (16, 16', 18, 24, 24', 26), each having an outer interconnection layer (36) and an outer electrode (28), which are disposed next to each other with rolled, porous, hollow, electrically conducting metal mesh conductors (20, 20') between the fuel cells, connecting the fuel cells at least in series along columns (15, 15') and where there are no metal felt connections between any fuel cells.

Tomlins, Gregory W. (Pittsburgh, PA); Jaszcar, Michael P. (Murrysville, PA)

2002-01-01T23:59:59.000Z

150

Energy savings by means of fuel cell electrodes in electro-chemical industries. Annual report for August 1, 1978-July 31, 1979  

DOE Green Energy (OSTI)

The objectives of the subject program are: to evaluate experimentally, on a laboratory scale, energy and cost savings in electrowinning of zinc by substituting, for the conventional lead anode, a Prototech proprietary hydrogen anode operating on pure and impure feeds; to similarly evaluate experimentally, again on a laboratory scale, voltage, and thus energy savings in chlor-alkali membrane cells by substituting, for the conventional steel cathode, a Prototech proprietary air cathode; to consult with Lockheed and Lawrence Livermore Laboratory (LLL) on the subject of suitable air electrodes for metal/water/air batteries; and prepare cost estimates of all processes investigated based on laboratory results.

Allen, R.J.; Juda, W.; Lindstrom, R.W.; Petrow, H.G.

1979-10-31T23:59:59.000Z

151

Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies  

NLE Websites -- All DOE Office Websites (Extended Search)

Market Transformation Market Transformation Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies to someone by E-mail Share Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies on Facebook Tweet about Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies on Twitter Bookmark Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies on Google Bookmark Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies on Delicious Rank Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies on Digg Find More places to share Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologies on AddThis.com... Early Adoption of Fuel Cells Early Market Applications for Fuel Cells

152

Fuel Cell Technologies Office: DOE Fuel Cell Pre-Solicitation...  

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DOE Fuel Cell Pre-Solicitation Workshop to someone by E-mail Share Fuel Cell Technologies Office: DOE Fuel Cell Pre-Solicitation Workshop on Facebook Tweet about Fuel Cell...

153

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

2 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: January 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell...

154

Fuel Cell Technologies Office: 2010 New Fuel Cell Projects Meeting  

NLE Websites -- All DOE Office Websites (Extended Search)

2010 New Fuel Cell Projects Meeting to someone by E-mail Share Fuel Cell Technologies Office: 2010 New Fuel Cell Projects Meeting on Facebook Tweet about Fuel Cell Technologies...

155

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

3 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: January 2013 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell...

156

Fuel Cell Technologies Office: 2009 New Fuel Cell Projects Meeting  

NLE Websites -- All DOE Office Websites (Extended Search)

09 New Fuel Cell Projects Meeting to someone by E-mail Share Fuel Cell Technologies Office: 2009 New Fuel Cell Projects Meeting on Facebook Tweet about Fuel Cell Technologies...

157

Fuel Cell Technologies Office: Biogas and Fuel Cells Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Biogas and Fuel Cells Workshop to someone by E-mail Share Fuel Cell Technologies Office: Biogas and Fuel Cells Workshop on Facebook Tweet about Fuel Cell Technologies Office:...

158

Fuel Cell Technologies Office: Fuel Cells for Buildings Roadmap...  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells for Buildings Roadmap Workshop to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cells for Buildings Roadmap Workshop on Facebook Tweet about Fuel Cell...

159

California Fuel Cell Partnership  

NLE Websites -- All DOE Office Websites (Extended Search)

Speaker(s): Bob Knight Date: October 19, 2000 - 12:00pm Location: Bldg. 90 The California Fuel Cell Partnership is a current collaboration among major automakers, fuel cell...

160

Fuel cell arrangement  

DOE Patents (OSTI)

A fuel cell arrangement is provided wherein cylindrical cells of the solid oxide electrolyte type are arranged in planar arrays where the cells within a plane are parallel. Planes of cells are stacked with cells of adjacent planes perpendicular to one another. Air is provided to the interior of the cells through feed tubes which pass through a preheat chamber. Fuel is provided to the fuel cells through a channel in the center of the cell stack; the fuel then passes the exterior of the cells and combines with the oxygen-depleted air in the preheat chamber.

Isenberg, Arnold O. (Forest Hills Boro, PA)

1987-05-12T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Fuel cell arrangement  

DOE Patents (OSTI)

A fuel cell arrangement is provided wherein cylindrical cells of the solid oxide electrolyte type are arranged in planar arrays where the cells within a plane are parallel. Planes of cells are stacked with cells of adjacent planes perpendicular to one another. Air is provided to the interior of the cells through feed tubes which pass through a preheat chamber. Fuel is provided to the fuel cells through a channel in the center of the cell stack; the fuel then passes the exterior of the cells and combines with the oxygen-depleted air in the preheat chamber. 3 figs.

Isenberg, A.O.

1987-05-12T23:59:59.000Z

162

Micro fuel cell  

SciTech Connect

An ambient temperature, liquid feed, direct methanol fuel cell device is under development. A metal barrier layer was used to block methanol crossover from the anode to the cathode side while still allowing for the transport of protons from the anode to the cathode. A direct methanol fuel cell (DMFC) is an electrochemical engine that converts chemical energy into clean electrical power by the direct oxidation of methanol at the fuel cell anode. This direct use of a liquid fuel eliminates the need for a reformer to convert the fuel to hydrogen before it is fed into the fuel cell.

Zook, L.A.; Vanderborgh, N.E. [Los Alamos National Lab., NM (United States); Hockaday, R. [Energy Related Devices Inc., Los Alamos, NM (United States)

1998-12-31T23:59:59.000Z

163

Energy Basics: Fuel Cell Vehicles  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

& Fuels Printable Version Share this resource Fuels Vehicles Electric Vehicles Flexible Fuel Vehicles Fuel Cell Vehicles Hybrid Electric Vehicles Natural Gas Vehicles Propane...

164

Power from the Fuel Cell  

E-Print Network (OSTI)

Power for Buildings Using Fuel-Cell Cars, Proceedings ofwell as to drive down fuel-cell system costs through productis most likely to be the fuel-cell vehicle. Fuel cells are

Lipman, Timothy E.

2000-01-01T23:59:59.000Z

165

Molecular-Scale, Three-Dimensional Non-Platinum Group Metal Electrodes for Catalysis of Fuel Cell Reactions - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report John B. Kerr 1 (Primary Contact), Piotr Zelenay 2 , Steve Hamrock 3 1 Lawrence Berkeley National Laboratory (LBNL) MS 62R0203, 1 Cyclotron Road Berkeley, CA 94720 Phone: (510) 486-6279 Email: jbkerr@lbl.gov 2 Los Alamos National Laboratory (LANL) 3 3M Fuel Cell Components Program DOE Manager HQ: Donna Ho Phone: (202) 586-8000 Email: Donna.Ho@ee.doe.gov Collaborators: * Adam Weber, John Arnold Jeff Reimer, Martin Head-Gordon, Robert Kostecki (LBNL) * James Boncella, Yu Sueng Kim, Jerzy Chlistunoff, Neil Henson (LANL) * Radoslav Atanasoski (3M) Project Start Date: August 31, 2009

166

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Resources Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter to someone by E-mail Share Fuel...

167

Fuel Cells Information at NIST  

Science Conference Proceedings (OSTI)

NIST Home > Fuel Cells Information at NIST. Fuel Cells Information at NIST. (the links below are a compilation of programs ...

2010-08-23T23:59:59.000Z

168

Pt/Pd electrocatalyst electrons for fuel cells  

DOE Patents (OSTI)

This invention relates to improved electrochemical cells and to novel electrodes for use therein. In particular, the present invention comprises a fuel cell used primarily for the consumption of impure hydrogen fuels containing carbon monoxide or carbonaceous fuels where the electrode in contact with the fuel is not substantially poisoned by carbon monoxide. The anode of the fuel cell comprises a Pd/Pt alloy supported on a graphitized or partially graphitized carbon material. Fuel cells which comprise as essential elements a fuel electrode, an oxidizing electrode, and an electrolyte between said electrodes are devices for the direct production of electricity through the electrochemical combustion of a fuel and oxidant. These devices are recognized for their high efficiency as energy conversion units, since unlike conventional combustion engines, they are not subject to the limitations of the Carnot heat cycle. It is the primary object of the present invention to provide an electrode having high electrochemical activity for an electrochemical cell. It is another object of the present invention to provide an electrode having an electro-catalyst which is highly resistant to the corrosive environment of an electrochemical cell.

Stonehart, P.

1981-11-03T23:59:59.000Z

169

Fuel Cell Handbook update  

DOE Green Energy (OSTI)

The objective of this work was to update the 1988 version of DOE`s Fuel Cell Handbook. Significant developments in the various fuel cell technologies required revisions to reflect state-of-the-art configurations and performance. The theoretical presentation was refined in order to make the handbook more useful to both the casual reader and fuel cell or systems analyst. In order to further emphasize the practical application of fuel cell technologies, the system integration information was expanded. In addition, practical elements, such as suggestions and guidelines to approximate fuel cell performance, were provided.

Owens, W.R.; Hirschenhofer, J.H.; Engleman, R.R. Jr.; Stauffer, D.B.

1993-11-01T23:59:59.000Z

170

NIST: NIF - PEM Fuel Cells  

Science Conference Proceedings (OSTI)

... Fuel cells are operationally equivalent to a battery. The reactants or fuel in a fuel cell can be replaced unlike a standard disposable or rechargeable ...

171

Fuel Cell 101  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell 101 Fuel Cell 101 Don Hoffman Don Hoffman Ship Systems & Engineering Research Division March 2011 Distribution Statement A: Approved for public release; distribution is unlimited. Fuel Cell Operation * A Fuel Cell is an electrochemical power source * It supplies electricity by combining hydrogen and oxygen electrochemically without combustion. * It is configured like a battery with anode and cathode. * Unlike a battery, it does not run down or require recharging and will produce electricity and will produce electricity, heat and water as long as fuel is supplied. 2H + + 2e - O 2 + 2H + + 2e - 2H 2 O H 2 Distribution Statement A: Approved for public release; distribution is unlimited. 2 FUEL FUEL CONTROLS Fuel Cell System HEAT & WATER CLEAN CLEAN EXHAUST EXHAUST

172

Fuel cell with electrolyte feed system  

DOE Patents (OSTI)

A fuel cell having a pair of electrodes at the sites of electrochemical reactions of hydrogen and oxygen and a phosphoric acid electrolyte provided with an electrolyte supporting structure in the form of a laminated matrix assembly disposed between the electrodes. The matrix assembly is formed of a central layer disposed between two outer layers, each being permeable to the flow of the electrolyte. The central layer is provided with relatively large pores while the outer layers are provided with relatively small pores. An external reservoir supplies electrolyte via a feed means to the central layer to compensate for changes in electrolyte volume in the matrix assembly during the operation of fuel cell.

Feigenbaum, Haim (Highland Park, NJ)

1984-01-01T23:59:59.000Z

173

Fuel cell generator  

DOE Patents (OSTI)

High temperature solid oxide electrolyte fuel cell generators which allow controlled leakage among plural chambers in a sealed housing. Depleted oxidant and fuel are directly reacted in one chamber to combust remaining fuel and preheat incoming reactants. The cells are preferably electrically arranged in a series-parallel configuration.

Isenberg, Arnold O. (Forest Hills, PA)

1983-01-01T23:59:59.000Z

174

Apparatus tube configuration and mounting for solid oxide fuel cells  

DOE Patents (OSTI)

A generator apparatus is made containing long, hollow, tubular, fuel cells containing an inner air electrode, an outer fuel electrode, and solid electrolyte there between, placed between a fuel distribution board and a board which separates the combustion chamber from the generating chamber, where each fuel cell has an insertable open end and in insertable, plugged, closed end, the plugged end being inserted into the fuel distribution board and the open end being inserted through the separator board where the plug is completely within the fuel distribution board. 3 figures.

Zymboly, G.E.

1993-09-14T23:59:59.000Z

175

Apparatus tube configuration and mounting for solid oxide fuel cells  

DOE Patents (OSTI)

A generator apparatus (10) is made containing long, hollow, tubular, fuel cells containing an inner air electrode (64), an outer fuel electrode (56), and solid electrolyte (54) therebetween, placed between a fuel distribution board (29) and a board (32) which separates the combustion chamber (16) from the generating chamber (14), where each fuel cell has an insertable open end and in insertable, plugged, closed end (44), the plugged end being inserted into the fuel distribution board (29) and the open end being inserted through the separator board (32) where the plug (60) is completely within the fuel distribution board (29).

Zymboly, Gregory E. (Murrysville, PA)

1993-01-01T23:59:59.000Z

176

DOE Hydrogen and Fuel Cells Program: 2006 Annual Progress Report - Fuel  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells Printable Version 2006 Annual Progress Report V. Fuel Cells This section of the 2006 Progress Report for the DOE Hydrogen Program focuses on fuel cells. Each technical report is available as an individual Adobe Acrobat PDF. Download Adobe Reader. Fuel Cells Sub-Program Overview, Valri Lightner, Fuel Cell Team Lead, DOE Hydrogen Program (PDF 169 KB) A. Membrane Electrode Assemblies (MEAs) Integrated Manufacturing for Advanced Membrane Electrode Assemblies, Emory DeCastro, PEMEAS U.S.A., E-TEK Division (PDF 251 KB) Advanced MEAs for Enhanced Operating Conditions, Mark Debe, 3M (PDF 892 KB) Electrocatalyst Supports and Electrode Structures, Mahlon Wilson, Los Alamos National Laboratory (PDF 1.46 MB) Back to Top B. Membranes and MEAs Poly(p-Phenylene Sulfonic Acid)s with Frozen-in Free Volume for Use

177

DOE Hydrogen and Fuel Cells Program: 2005 Annual Progress Report - Fuel  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells Printable Version 2005 Annual Progress Report VII. Fuel Cells This section of the 2005 Progress Report for the DOE Hydrogen Program focuses on fuel cells. Each technical report is available as an individual Adobe Acrobat PDF. Download Adobe Reader. Fuel Cells Sub-program Overview, Valri Lightner, Department of Energy (PDF 198 KB) A. Membrane Electrode Assemblies (MEA) Integrated Manufacturing for Advanced Membrane Electrode Assemblies, Emory S. De Castro, De Nora N.A., E-TEK Division (PDF 292 KB) Advanced MEAs for Enhanced Operating Conditions, Mark K. Debe, 3M Company (PDF 459 KB) Development of High-temperature Membranes and Improved Cathode Catalysts, Lesia Protsailo, UTC Fuel Cells (PDF 642 KB) Electrocatalyst Supports and Electrode Structures, Eric Brosha, Los

178

Fuel Cells Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen Storage DELIVERY FUEL CELLS STORAGE PRODUCTION TECHNOLOGY VALIDATION CODES & STANDARDS SYSTEMS INTEGRATION / ANALYSES SAFETY EDUCATION RESEARCH & DEVELOPMENT Economy Pat Davis 2 Fuel Cells Technical Goals & Objectives Goal : Develop and demonstrate fuel cell power system technologies for transportation, stationary, and portable applications. 3 Fuel Cells Technical Goals & Objectives Objectives * Develop a 60% efficient, durable, direct hydrogen fuel cell power system for transportation at a cost of $45/kW (including hydrogen storage) by 2010. * Develop a 45% efficient reformer-based fuel cell power system for transportation operating on clean hydrocarbon or alcohol based fuel that meets emissions standards, a start-up time of 30 seconds, and a projected manufactured cost of $45/kW by

179

Reforming of fuel inside fuel cell generator  

DOE Patents (OSTI)

Disclosed is an improved method of reforming a gaseous reformable fuel within a solid oxide fuel cell generator, wherein the solid oxide fuel cell generator has a plurality of individual fuel cells in a refractory container, the fuel cells generating a partially spent fuel stream and a partially spent oxidant stream. The partially spent fuel stream is divided into two streams, spent fuel stream 1 and spent fuel stream 2. Spent fuel stream 1 is burned with the partially spent oxidant stream inside the refractory container to produce an exhaust stream. The exhaust stream is divided into two streams, exhaust stream 1 and exhaust stream 2, and exhaust stream 1 is vented. Exhaust stream 2 is mixed with spent fuel stream 2 to form a recycle stream. The recycle stream is mixed with the gaseous reformable fuel within the refractory container to form a fuel stream which is supplied to the fuel cells. Also disclosed is an improved apparatus which permits the reforming of a reformable gaseous fuel within such a solid oxide fuel cell generator. The apparatus comprises a mixing chamber within the refractory container, means for diverting a portion of the partially spent fuel stream to the mixing chamber, means for diverting a portion of exhaust gas to the mixing chamber where it is mixed with the portion of the partially spent fuel stream to form a recycle stream, means for injecting the reformable gaseous fuel into the recycle stream, and means for circulating the recycle stream back to the fuel cells. 1 fig.

Grimble, R.E.

1988-03-08T23:59:59.000Z

180

Reforming of fuel inside fuel cell generator  

DOE Patents (OSTI)

Disclosed is an improved method of reforming a gaseous reformable fuel within a solid oxide fuel cell generator, wherein the solid oxide fuel cell generator has a plurality of individual fuel cells in a refractory container, the fuel cells generating a partially spent fuel stream and a partially spent oxidant stream. The partially spent fuel stream is divided into two streams, spent fuel stream I and spent fuel stream II. Spent fuel stream I is burned with the partially spent oxidant stream inside the refractory container to produce an exhaust stream. The exhaust stream is divided into two streams, exhaust stream I and exhaust stream II, and exhaust stream I is vented. Exhaust stream II is mixed with spent fuel stream II to form a recycle stream. The recycle stream is mixed with the gaseous reformable fuel within the refractory container to form a fuel stream which is supplied to the fuel cells. Also disclosed is an improved apparatus which permits the reforming of a reformable gaseous fuel within such a solid oxide fuel cell generator. The apparatus comprises a mixing chamber within the refractory container, means for diverting a portion of the partially spent fuel stream to the mixing chamber, means for diverting a portion of exhaust gas to the mixing chamber where it is mixed with the portion of the partially spent fuel stream to form a recycle stream, means for injecting the reformable gaseous fuel into the recycle stream, and means for circulating the recycle stream back to the fuel cells.

Grimble, Ralph E. (Finleyville, PA)

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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181

Fuel Cell Technologies Office: Early Market Applications for Fuel Cell  

NLE Websites -- All DOE Office Websites (Extended Search)

Market Transformation Market Transformation Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies to someone by E-mail Share Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies on Facebook Tweet about Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies on Twitter Bookmark Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies on Google Bookmark Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies on Delicious Rank Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies on Digg Find More places to share Fuel Cell Technologies Office: Early Market Applications for Fuel Cell Technologies on AddThis.com...

182

Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Joint Fuel Cell Bus Joint Fuel Cell Bus Workshop to someone by E-mail Share Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop on Facebook Tweet about Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop on Twitter Bookmark Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop on Google Bookmark Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop on Delicious Rank Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop on Digg Find More places to share Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings Annual Merit Review Proceedings Workshop & Meeting Proceedings Webinars

183

Breaking the Fuel Cell Cost Barrier  

NLE Websites -- All DOE Office Websites (Extended Search)

Breaking the Fuel Cell Cost Barrier Breaking the Fuel Cell Cost Barrier AMFC Workshop May 8 th , 2011, Arlington, VA Shimshon Gottesfeld, CTO The Fuel Cell Cost Challenge 2 CellEra's goal - achieve price parity with incumbents earlier on in market entry process ! Mainstream Polymer Electrolyte Fuel Cell ( PEM) Cost Barriers 3 Graphite / stainless steel hardware Acidic membrane Platinum based electrodes Cost barriers deeply embedded in core tech materials BOM-based cost barriers - 90% of stack cost Cost volatility - Platinum $500/Oz - $2,500/Oz The possibility of an OH - ion conducting membrane 4 Non-acidic membrane CellEra Took Advantage of this Opportunity A new type of membrane component with potential for strong fuel cell cost cuts was revealed in 2006, but was accompanied by general industry skepticism

184

Fuel cell membranes and crossover prevention  

DOE Patents (OSTI)

A membrane electrode assembly for use with a direct organic fuel cell containing a formic acid fuel includes a solid polymer electrolyte having first and second surfaces, an anode on the first surface and a cathode on the second surface and electrically linked to the anode. The solid polymer electrolyte has a thickness t:.gtoreq..times..times..times..times. ##EQU00001## where C.sub.f is the formic acid fuel concentration over the anode, D.sub.f is the effective diffusivity of the fuel in the solid polymer electrolyte, K.sub.f is the equilibrium constant for partition coefficient for the fuel into the solid polymer electrolyte membrane, I is Faraday's constant n.sub.f is the number of electrons released when 1 molecule of the fuel is oxidized, and j.sub.f.sup.c is an empirically determined crossover rate of fuel above which the fuel cell does not operate.

Masel, Richard I. (Champaign, IL); York, Cynthia A. (Newington, CT); Waszczuk, Piotr (White Bear Lake, MN); Wieckowski, Andrzej (Champaign, IL)

2009-08-04T23:59:59.000Z

185

Layered electrodes for lithium cells and batteries  

DOE Patents (OSTI)

Lithium metal oxide compounds of nominal formula Li.sub.2MO.sub.2, in which M represents two or more positively charged metal ions, selected predominantly and preferably from the first row of transition metals are disclosed herein. The Li.sub.2MO.sub.2 compounds have a layered-type structure, which can be used as positive electrodes for lithium electrochemical cells, or as a precursor for the in-situ electrochemical fabrication of LiMO.sub.2 electrodes. The Li.sub.2MO.sub.2 compounds of the invention may have additional functions in lithium cells, for example, as end-of-discharge indicators, or as negative electrodes for lithium cells.

Johnson, Christopher S. (Naperville, IL); Thackeray, Michael M. (Naperville, IL); Vaughey, John T. (Elmhurst, IL); Kahaian, Arthur J. (Chicago, IL); Kim, Jeom-Soo (Naperville, IL)

2008-04-15T23:59:59.000Z

186

Customizable Fuel Processor Technology Benefits Fuel Cell ...  

Customizable Fuel Processor Technology Benefits Fuel Cell Power Industry (ANL-IN-00-030) Argonne National Laboratory. Contact ANL About This ...

187

Methanol fuel cell model: Anode  

Science Conference Proceedings (OSTI)

An isothermal, steady-state model of an anode in a direct methanol feed, polymer electrolyte fuel cell is presented. The anode is considered to be a porous electrode consisting of an electronically conducting catalyst structure that is thinly coated with an ion-selective polymer electrolyte. The pores are filled with a feed solution of 2 M methanol in water. Four species are transported in the anode: water, methanol, hydrogen ions, and carbon dioxide. All four species are allowed to transport in the x-direction through the depth of the electrode. Species movement in the pseudo y-direction is taken into account for water, methanol, and carbon dioxide by use of an effective mass-transfer coefficient. Butler-Volmer kinetics are observed for the methanol oxidation reaction. Predictions of the model have been fitted with kinetic parameters from experimental data, and a sensitivity analysis was performed to identify critical parameters affecting the anode`s performance. Kinetic limitations are a dominant factor in the performance of the system. At higher currents, the polymer electrolyte`s conductivity and the anode`s thickness were also found to be important parameters to the prediction of a polymer electrolyte membrane fuel cell anode`s behavior in the methanol oxidation region 0.5--0.6 V vs. a reversible hydrogen electrode.

Baxter, S.F. [Argonne National Lab., IL (United States); Battaglia, V.S.; White, R.E. [Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering

1999-02-01T23:59:59.000Z

188

NETL: Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells Coal and Power Systems Fuel Cells SECA Logo Welcome to NETL's Fuel Cells Webpage. In partnership with private industry, educational institutions and national laboratories, we are leading the research, development, and demonstration of high efficiency, fuel flexible solid oxide fuel cells (SOFCs) and coal-based SOFC power generation systems for stationary market large central power plants under the Solid State Energy Conversion Alliance (SECA). The SECA cost reduction goal is to have SOFC systems capable of being manufactured at $400 per kilowatt by 2010. Concurrently, the scale-up, aggregation, and integration of the technology will progress in parallel leading to prototype validation of megawatt (MW)-class fuel flexible products by 2012 and 2015. The SECA coal-based systems goal is the development of large

189

Heteroatom incorporated coke for electrochemical cell electrode  

DOE Patents (OSTI)

This invention relates to an electrode for a coke/alkali metal electrochemical cell comprising: (a) calcined coke particles: (i) that contain at least 0.5 weight percent of nitrogen heteroatoms and at least 1.0 weight percent sulfur heteroatoms, and (ii) that have an average particle size from 2 microns to 40 microns with essentially no particles being greater than 50 microns. (b) a binder This invention also relates to a coke/alkali metal electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrically conductive salt, and (c) a counterelectrode.

Lewis, Irwin Charles (Strongsville, OH); Greinke, Ronald Alfred (Medina, OH)

1997-01-01T23:59:59.000Z

190

Heteroatom incorporated coke for electrochemical cell electrode  

DOE Patents (OSTI)

This invention relates to an electrode for a coke/alkali metal electrochemical cell comprising: (a) calcined coke particles: (1) that contain at least 0.5 weight percent of nitrogen heteroatoms and at least 1.0 weight percent sulfur heteroatoms, and (2) that have an average particle size from 2 microns to 40 microns with essentially no particles being greater than 50 microns and (b) a binder. This invention also relates to a coke/alkali metal electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrically conductive salt, and (c) a counterelectrode. 5 figs.

Lewis, I.C.; Greinke, R.A.

1997-06-17T23:59:59.000Z

191

Fuels processing for transportation fuel cell systems  

DOE Green Energy (OSTI)

Fuel cells primarily use hydrogen as the fuel. This hydrogen must be produced from other fuels such as natural gas or methanol. The fuel processor requirements are affected by the fuel to be converted, the type of fuel cell to be supplied, and the fuel cell application. The conventional fuel processing technology has been reexamined to determine how it must be adapted for use in demanding applications such as transportation. The two major fuel conversion processes are steam reforming and partial oxidation reforming. The former is established practice for stationary applications; the latter offers certain advantages for mobile systems and is presently in various stages of development. This paper discusses these fuel processing technologies and the more recent developments for fuel cell systems used in transportation. The need for new materials in fuels processing, particularly in the area of reforming catalysis and hydrogen purification, is discussed.

Kumar, R.; Ahmed, S.

1995-07-01T23:59:59.000Z

192

Enhanced Power Stability for Proton Conducting Solid Oxides Fuel Cells. Calculated energy barriers for proton diffusion in Y-doped BaZrO3. Potential electrode materials for application in proton ceramic fuel cells.  

DOE Green Energy (OSTI)

A series of Quantum Mechanical (QM) calculations on Y-doped BaZrO{sub 3} (BYZ) periodic structures have been performed and calculated energy barriers for the intra-octahedra and inter-octahedra proton transfer have been found. The inter-octahedra proton transfer dominates in the BYZ electrolyte. Several potential cathode materials for the Y-doped BaZrO{sub 3} system were synthesized via glycine nitrate combustion method. Of the five potential cathode materials examined BaZr{sub 0.40}Pr{sub 0.40}Gd{sub 0.20}O{sub 3} and BaZr{sub 0.60}Y{sub 0.20}Co{sub 0.20}O{sub 3} appear to be the most promising for further applications in proton ceramic fuel cells (PCFCs). Potential anode electrocatalysts (metals) have been screened for reactivity with BaZr{sub 1-x}Y{sub x}O{sub 3-d}, fabrication compatibility, and chemical stability in fuel cell environment.

Boris Merinov; Sossina Haile; William A. Goddard III

2005-04-30T23:59:59.000Z

193

Distributed Energy Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Fuel Cells Energy Fuel Cells DOE Hydrogen DOE Hydrogen and and Fuel Cells Fuel Cells Coordination Meeting Fuel Cell Coordination Meeting June 2-3, 2003 Electricity Users Kathi Epping Kathi Epping Objectives & Barriers Distributed Energy OBJECTIVES * Develop a distributed generation PEM fuel cell system operating on natural gas or propane that achieves 40% electrical efficiency and 40,000 hours durability at $400-750/kW by 2010. BARRIERS * Durability * Heat Utilization * Power Electronics * Start-Up Time Targets and Status Integrated Stationary PEMFC Power Systems Operating on Natural Gas or Propane Containing 6 ppm Sulfur 40,000 30,000 15,000 Hours Durability 750 1,250 2,500 $/kWe Cost 40 32 30 % Electrical Efficiency Large (50-250 kW) Systems 40,000 30,000 >6,000 Hours Durability 1,000 1,500 3,000

194

Electrochemical cell having cyclindircal electrode elements  

DOE Patents (OSTI)

A secondary, high temperature electrochemical cell especially adapted for lithium alloy negative electrodes, transition metal chalcogenide positive electrodes and alkali metal halide or alkaline earth metal halide electrolyte is disclosed. The cell is held within an elongated cylindrical container in which one of the active materials is filled around the outside surfaces of a pluraity of perforate tubular current collectors along the length of the container. Each of the current collector tubes contain a concentric atubular layer of electrically insulative ceramic as an interelectrode separator. The active material of opposite polarity in elongated pin shape is positioned longitudinally within the separator layer. A second electrically conductive tube with perforate walls can be swagged or otherwise bonded to the outer surface of the pin as a current cllector and the electrically insulative ceramic layer can be coated or otherwise layered onto the outer surface of this second current collector. Alternatively, the central pin electrode can include an axial core as a current collector.

Nelson, P.A.; Shimotake, H.

1981-03-05T23:59:59.000Z

195

Electrochemical cell having cylindrical electrode elements  

DOE Patents (OSTI)

A secondary, high temperature electrochemical cell especially adapted for lithium alloy negative electrodes, transition metal chalcogenide positive electrodes and alkali metal halide or alkaline earth metal halide electrolyte is disclosed. The cell is held within an elongated cylindrical container in which one of the active materials is filled around the outside surfaces of a plurality of perforate tubular current collectors along the length of the container. Each of the current collector tubes contain a concentric tubular layer of electrically insulative ceramic as an interelectrode separator. The active material of opposite polarity in elongated pin shape is positioned longitudinally within the separator layer. A second electrically conductive tube with perforate walls can be swagged or otherwise bonded to the outer surface of the pin as a current collector and the electrically insulative ceramic layer can be coated or otherwise layered onto the outer surface of this second current collector. Alternatively, the central pin electrode can include an axial core as a current collector.

Nelson, Paul A. (Wheaton, IL); Shimotake, Hiroshi (Hinsdale, IL)

1982-01-01T23:59:59.000Z

196

Fuel cell market applications  

DOE Green Energy (OSTI)

This is a review of the US (and international) fuel cell development for the stationary power generation market. Besides DOE, GRI, and EPRI sponsorship, the US fuel cell program has over 40% cost-sharing from the private sector. Support is provided by user groups with over 75 utility and other end-user members. Objectives are to develop and demonstrate cost-effective fuel cell power generation which can initially be commercialized into various market applications using natural gas fuel by the year 2000. Types of fuel cells being developed include PAFC (phosphoric acid), MCFC (molten carbonate), and SOFC (solid oxide); status of each is reported. Potential international applications are reviewed also. Fuel cells are viewed as a force in dispersed power generation, distributed power, cogeneration, and deregulated industry. Specific fuel cell attributes are discussed: Fuel cells promise to be one of the most reliable power sources; they are now being used in critical uninterruptible power systems. They need hydrogen which can be generated internally from natural gas, coal gas, methanol landfill gas, or other fuels containing hydrocarbons. Finally, fuel cell development and market applications in Japan are reviewed briefly.

Williams, M.C.

1995-12-31T23:59:59.000Z

197

Molten carbonate fuel cell  

DOE Patents (OSTI)

A molten electrolyte fuel cell with an array of stacked cells and cell enclosures isolating each cell except for access to gas manifolds for the supply of fuel or oxidant gas or the removal of waste gas, the cell enclosures collectively providing an enclosure for the array and effectively avoiding the problems of electrolyte migration and the previous need for compression of stack components, the fuel cell further including an inner housing about and in cooperation with the array enclosure to provide a manifold system with isolated chambers for the supply and removal of gases. An external insulated housing about the inner housing provides thermal isolation to the cell components.

Kaun, Thomas D. (New Lenox, IL); Smith, James L. (Lemont, IL)

1987-01-01T23:59:59.000Z

198

Molten carbonate fuel cell  

DOE Patents (OSTI)

A molten electrolyte fuel cell is disclosed with an array of stacked cells and cell enclosures isolating each cell except for access to gas manifolds for the supply of fuel or oxidant gas or the removal of waste gas. The cell enclosures collectively provide an enclosure for the array and effectively avoid the problems of electrolyte migration and the previous need for compression of stack components. The fuel cell further includes an inner housing about and in cooperation with the array enclosure to provide a manifold system with isolated chambers for the supply and removal of gases. An external insulated housing about the inner housing provides thermal isolation to the cell components.

Kaun, T.D.; Smith, J.L.

1986-07-08T23:59:59.000Z

199

Solid Oxide Fuel Cells: Technology Status  

Science Conference Proceedings (OSTI)

In its most common configuration, solid oxide fuel cell (SOFC) uses an oxygen ion conducting ceramic electrolyte membrane, perovskite cathode and nickel cermet anode electrode. Cells operate in the 600-1000 C temperature range and utilize metallic or ceramic current collectors for cell-to-cell interconnection. Recent development in engineered electrode architectures, component materials chemistry, cell and stack designs and fabrication processes have led to significant improvement in the electrical performance and performance stability as well as reduction in the operating temperature of such cells. Large kW-size power generation systems have been designed and field demonstrated. This paper reviews the status of SOFC power generation systems with emphasis on cell and stack component materials, electrode reactions, materials reactions and corrosion processes

Singh, Prabhakar; Minh, Nguyen Q.

2004-08-01T23:59:59.000Z

200

Modeling & Simulation - Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

GCTool Computer Model Helps Focus Fuel Cell Vehicle Research Somewhere near Detroit, an automotive engineer stares at the ceiling, wondering how to squeeze 1% more efficiency out...

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Opportunities with Fuel Cells  

Reports and Publications (EIA)

The concept for fuel cells was discovered in the nineteenth century. Today, units incorporating this technology are becoming commercially available for cogeneration applications.

Information Center

1994-05-01T23:59:59.000Z

202

Hydrogen Fuel Cells  

Fuel Cell Technologies Publication and Product Library (EERE)

The fuel cell an energy conversion device that can efficiently capture and use the power of hydrogen is the key to making it happen.

203

Fuel Cell Development Status  

NLE Websites -- All DOE Office Websites (Extended Search)

Development Status Michael Short Systems Engineering Manager United Technologies Corporation Research Center Hamilton Sundstrand UTC Power UTC Fire & Security Fortune 50 corporation $52.9B in annual sales in 2009 ~60% of Sales are in building technologies Transportation Stationary Fuel Cells Space & Defense * Fuel cell technology leader since 1958 * ~ 550 employees * 768+ Active U.S. patents, more than 300 additional U.S. patents pending * Global leader in efficient, reliable, and sustainable fuel cell solutions UTC Power About Us PureCell ® Model 400 Solution Process Overview Power Conditioner Converts DC power to high-quality AC power 3 Fuel Cell Stack Generates DC power from hydrogen and air 2 Fuel Processor Converts natural gas fuel to hydrogen

204

Fuel Cell Demonstration Program  

DOE Green Energy (OSTI)

In an effort to promote clean energy projects and aid in the commercialization of new fuel cell technologies the Long Island Power Authority (LIPA) initiated a Fuel Cell Demonstration Program in 1999 with six month deployments of Proton Exchange Membrane (PEM) non-commercial Beta model systems at partnering sites throughout Long Island. These projects facilitated significant developments in the technology, providing operating experience that allowed the manufacturer to produce fuel cells that were half the size of the Beta units and suitable for outdoor installations. In 2001, LIPA embarked on a large-scale effort to identify and develop measures that could improve the reliability and performance of future fuel cell technologies for electric utility applications and the concept to establish a fuel cell farm (Farm) of 75 units was developed. By the end of October of 2001, 75 Lorax 2.0 fuel cells had been installed at the West Babylon substation on Long Island, making it the first fuel cell demonstration of its kind and size anywhere in the world at the time. Designed to help LIPA study the feasibility of using fuel cells to operate in parallel with LIPA's electric grid system, the Farm operated 120 fuel cells over its lifetime of over 3 years including 3 generations of Plug Power fuel cells (Lorax 2.0, Lorax 3.0, Lorax 4.5). Of these 120 fuel cells, 20 Lorax 3.0 units operated under this Award from June 2002 to September 2004. In parallel with the operation of the Farm, LIPA recruited government and commercial/industrial customers to demonstrate fuel cells as on-site distributed generation. From December 2002 to February 2005, 17 fuel cells were tested and monitored at various customer sites throughout Long Island. The 37 fuel cells operated under this Award produced a total of 712,635 kWh. As fuel cell technology became more mature, performance improvements included a 1% increase in system efficiency. Including equipment, design, fuel, maintenance, installation, and decommissioning the total project budget was approximately $3.7 million.

Gerald Brun

2006-09-15T23:59:59.000Z

205

Precious Metal Recovery from Fuel Cell MEA's  

DOE Green Energy (OSTI)

One of the next-generation power sources is the proton exchange membrane (PEM) fuel cell, which runs on pure hydrogen or hydrogen-rich reformate. At the heart of the PEM fuel cell is a membrane electrode assembly (MEA). The MEA is a laminate composed of electrode layers sandwiched between outer layers, fabricated from either carbon fiber or fabric and which control the diffusion of reactant gases, and the inner polymer mebrane. Hydrogen is oxidized at the anode to form protons, which migrate through the membrane and react with oxygen at the cathode to form water. In this type of fuel cell, platinum catalyzes the reactions at both electrodes. Realization of a future that includes ubiquitous use of hydrogen fuel cell-powered vehicles will be partially contingent on a process for recycling components of the fuel cell membrane electrode assemblies. In aggregate, the platinum used for the fuel cell will represent a large pool of this precious metal, and the efficient recycling of Pt from MEA's will be a cost-enabling factor for success of this technology. Care must be taken in the reclamation process because of the presence of fluoropolymers in the MEA. While Pt is normally recovered with high yield, the combustion process commonly applied to remove an organic matrix will also liberate a large volume of HF, a gas which is both toxic and corrosive. Carbonyl fluoride, which has a recommended exposure limit of 2ppmv, is another undesirable product of fluoroploymer combustion. In 2003, the Department of Energy awarded Engelhard Corporation an 80% cost share grant for a five-year project budgeted at $5.9MM. The principal objective is reclaiming platinum from fuel cell MEA's without producing fluorine-containing emissions. Over the last three years, Engelhard has approached the problem from several directions in balancing the two goals: a commercially-viable recycling process and an environmentally favorable one. Working with both fresh and aged fuel cells, it has been shown that precious metals can be liberated at high yield using microwave assisted acid digestion, but exposure of the gas diffusion electrode surfaces is required. A low-cost solvent-stripping process has been identified for two geometries of fuel cell MEA's: GDL and GDE. This paper will detail progress made in realizing a practical, "green" process for recovery of Pt from PEM fuel cell MEA's

Lawrence Shore

2006-11-16T23:59:59.000Z

206

Miniature ceramic fuel cell  

DOE Patents (OSTI)

A miniature power source assembly capable of providing portable electricity is provided. A preferred embodiment of the power source assembly employing a fuel tank, fuel pump and control, air pump, heat management system, power chamber, power conditioning and power storage. The power chamber utilizes a ceramic fuel cell to produce the electricity. Incoming hydro carbon fuel is automatically reformed within the power chamber. Electrochemical combustion of hydrogen then produces electricity.

Lessing, Paul A. (Idaho Falls, ID); Zuppero, Anthony C. (Idaho Falls, ID)

1997-06-24T23:59:59.000Z

207

Fuel Cell Technologies Office: About  

NLE Websites -- All DOE Office Websites (Extended Search)

variety of other fuels, including natural gas and renewable fuels such as methanol or biogas. Hydrogen and fuel cells can provide these benefits and address critical challenges in...

208

Ternary compound electrode for lithium cells  

DOE Patents (OSTI)

Lithium-based cells are promising for applications such as electric vehicles and load-leveling for power plants since lithium is very electropositive and of light weight. One type of lithium-based cell utilizes a molten salt electrolyte and normally is operated in the temperature range of about 350 to 500/sup 0/C. Such high temperature operation accelerates corrosion problems. The present invention provides an electrochemical cell in which lithium is the electroactive species. The cell has a positive electrode which includes a ternary compound generally represented as Li-M-O, wherein M is a transition metal. Corrosion of the inventive cell is considerably reduced.

Raistrick, I.D.; Godshall, N.A.; Huggins, R.A.

1980-07-30T23:59:59.000Z

209

Ternary compound electrode for lithium cells  

DOE Patents (OSTI)

Lithium-based cells are promising for applications such as electric vehicles and load-leveling for power plants since lithium is very electropositive and of light weight. One type of lithium-based cell utilizes a molten salt electrolyte and normally is operated in the temperature range of about 350.degree.-500.degree. C. Such high temperature operation accelerates corrosion problems. The present invention provides an electrochemical cell in which lithium is the electroactive species. The cell has a positive electrode which includes a ternary compound generally represented as Li-M-O, wherein M is a transition metal. Corrosion of the inventive cell is considerably reduced.

Raistrick, Ian D. (Menlo Park, CA); Godshall, Ned A. (Stanford, CA); Huggins, Robert A. (Stanford, CA)

1982-01-01T23:59:59.000Z

210

Solid oxide fuel cell generator  

DOE Patents (OSTI)

A solid oxide fuel cell generator has a plenum containing at least two rows of spaced apart, annular, axially elongated fuel cells. An electrical conductor extending between adjacent rows of fuel cells connects the fuel cells of one row in parallel with each other and in series with the fuel cells of the adjacent row. 5 figures.

Di Croce, A.M.; Draper, R.

1993-11-02T23:59:59.000Z

211

Solid oxide fuel cell generator  

DOE Patents (OSTI)

A solid oxide fuel cell generator has a plenum containing at least two rows of spaced apart, annular, axially elongated fuel cells. An electrical conductor extending between adjacent rows of fuel cells connects the fuel cells of one row in parallel with each other and in series with the fuel cells of the adjacent row.

Di Croce, A. Michael (Murrysville, PA); Draper, Robert (Churchill Boro, PA)

1993-11-02T23:59:59.000Z

212

Air breathing direct methanol fuel cell  

DOE Patents (OSTI)

An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol source.

Ren, Xiaoming (Los Alamos, NM)

2002-01-01T23:59:59.000Z

213

Solid Oxide Fuel Cells  

Science Conference Proceedings (OSTI)

Solid oxide fuel cell (SOFC) technology, which offers many advantages over traditional energy conversion systems including low emission and high efficiency, has become increasingly attractive to the utility, automotive, and defense industries (as shown in Figure 1). As an all solid-state energy conversion device, the SOFC operates at high temperatures (700-1,000 C) and produces electricity by electrochemically combining the fuel and oxidant gases across an ionically conducting oxide membrane. To build up a useful voltage, a number of cells or PENs (Positive cathode-Electrolyte-Negative anode) are electrically connected in series in a stack through bi-polar plates, also known as interconnects. Shown in Figure 2 (a) is a schematic of the repeat unit for a planar stack, which is expected to be a mechanically robust, high power-density and cost-effective design. In the stack (refer to Figure 2 (b)), the interconnect is simultaneously exposed to both an oxidizing (air) environment on the cathode side and a reducing (fuels such as hydrogen or natural gas) environment on the anode side for thousands of hours at elevated temperatures (700-1,000 C). Other challenges include the fact that water vapor is likely to be present in both of these environments, and the fuel is likely to contain sulfide impurities. Also, the interconnect must be stable towards any sealing materials with which it is in contact, under numerous thermal cycles. Furthermore, the interconnect must also be stable towards electrical contact materials that are employed to minimize interfacial contact resistance, and/or the electrode materials. Considering these service environments, the interconnect materials should possess the following properties: (1) Good surface stability (resistance to oxidation and corrosion) in both cathodic (oxidizing) and anodic (reducing) atmospheres. (2) Thermal expansion matching to the ceramic PEN and other adjacent components, all of which typically have a coefficient of thermal expansion (CTE) in the range of 10.5-12.0 x 10{sup -6} K{sup -1}. (3) High electrical conductivity through both the bulk material and in-situ formed oxide scales. (4) Satisfactory bulk and interfacial mechanical/thermomechanical reliability and durability at the SOFC operating temperatures. (5) Good compatibility with other materials in contact with interconnects such as seals and electrical contact materials. Until recently, the leading candidate material for the interconnect was doped lanthanum chromite (LaCrO3), which is a ceramic material which can easily withstand the traditional 1000 C operating temperature. However, the high cost of raw materials and fabrication, difficulties in obtaining high-density chromite parts at reasonable sintering temperatures, and the tendency of the chromite interconnect to partially reduce at the fuel gas/interconnect interface, causing the component to warp and the peripheral seal to break, have plagued the commercialization of planar SOFCs for years. The recent trend in developing lower temperature, more cost-effective cells which utilize anode-supported, several micron-thin electrolytes and/or new electrolytes with improved conductivity make it feasible for lanthanum chromite to be supplanted by metals or alloys as the interconnect materials. Compared to doped lanthanum chromite, metals or alloys offer significantly lower raw material and fabrication costs.

Yang, Z Gary; Stevenson, Jeffry W.; Singh, Prabhakar

2003-06-15T23:59:59.000Z

214

How Fuel Cells Work  

NLE Websites -- All DOE Office Websites (Extended Search)

How Fuel Cells Work How Fuel Cells Work Diagram: How a PEM fuel cell works. 1. Hydrogen fuel is channeled through field flow plates to the anode on one side of the fuel cell, while oxygen from the air is channeled to the cathode on the other side of the cell. 2. At the anode, a platinum catalyst causes the hydrogen to split into positive hydrogen ions (protons) and negatively charged electrons. 3. The Polymer Electrolyte Membrane (PEM) allows only the positively charged ions to pass through it to the cathode. The negatively charged electrons must travel along an external circuit to the cathode, creating an electrical current. 4. At the cathode, the electrons and positively charged hydrogen ions combine with oxygen to form water, which flows out of the cell.

215

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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2 to someone by E-mail 2 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: March 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: March 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: March 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: March 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: March 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: March 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Archives Subscribe

216

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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3 to someone by E-mail 3 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: February 2013 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: February 2013 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: February 2013 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: February 2013 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: February 2013 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: February 2013 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter

217

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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September 2012 to someone by E-mail September 2012 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications

218

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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2 to someone by E-mail 2 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Archives Subscribe Program Presentations

219

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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August 2013 to someone by E-mail August 2013 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2013 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2013 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2013 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2013 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2013 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2013 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter

220

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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October 2012 to someone by E-mail October 2012 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: October 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: October 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: October 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: October 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: October 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: October 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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April 2012 to someone by E-mail April 2012 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: April 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: April 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: April 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: April 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: April 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: April 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Archives

222

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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3 to someone by E-mail 3 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2013 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2013 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2013 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2013 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2013 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: May 2013 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Archives Subscribe Program Presentations

223

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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2 to someone by E-mail 2 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: June 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: June 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: June 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: June 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: June 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: June 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Archives Subscribe

224

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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September/October 2013 to someone by E-mail September/October 2013 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September/October 2013 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September/October 2013 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September/October 2013 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September/October 2013 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September/October 2013 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: September/October 2013 on AddThis.com... Publications

225

Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter:  

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August 2012 to someone by E-mail August 2012 to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2012 on Facebook Tweet about Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2012 on Twitter Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2012 on Google Bookmark Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2012 on Delicious Rank Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2012 on Digg Find More places to share Fuel Cell Technologies Office: Fuel Cell Technologies Office Newsletter: August 2012 on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter

226

Fuel Cell Technologies Office: Hydrogen and Fuel Cell Manufacturing...  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen and Fuel Cell Manufacturing R&D Workshop to someone by E-mail Share Fuel Cell Technologies Office: Hydrogen and Fuel Cell Manufacturing R&D Workshop on Facebook Tweet...

227

Fuel Cell Technologies Office: DOE Hydrogen and Fuel Cells Coordinatio...  

NLE Websites -- All DOE Office Websites (Extended Search)

DOE Hydrogen and Fuel Cells Coordination Meeting to someone by E-mail Share Fuel Cell Technologies Office: DOE Hydrogen and Fuel Cells Coordination Meeting on Facebook Tweet about...

228

Fuel Cells Vehicle Systems Analysis (Fuel Cell Freeze Investigation)  

DOE Green Energy (OSTI)

Presentation on Fuel Cells Vehicle Systems Analysis (Fuel Cell Freeze Investigation) for the 2005 Hydrogen, Fuel Cells & Infrastructure Technologies Program Annual Review held in Arlington, Virginia on May 23-26, 2005.

Pesaran, A.; Kim, G.; Markel, T.; Wipke, K.

2005-05-01T23:59:59.000Z

229

Corrugated Membrane Fuel Cell Structures  

SciTech Connect

One of the most challenging aspects of traditional PEM fuel cell stacks is the difficulty achieving the platinum catalyst utilization target of 0.2 gPt/kWe set forth by the DOE. Good catalyst utilization can be achieved with state-of-the-art catalyst coated membranes (CCM) when low catalyst loadings (<0.3 mg/cm2) are used at a low current. However, when low platinum loadings are used, the peak power density is lower than conventional loadings, requiring a larger total active area and a larger bipolar plate. This results in a lower overall stack power density not meeting the DOE target. By corrugating the fuel cell membrane electrode structure, Ion Power?s goal is to realize both the Pt utilization targets as well as the power density targets of the DOE. This will be achieved by demonstrating a fuel cell single cell (50 cm2) with a twofold increase in the membrane active area over the geometric area of the cell by corrugating the MEA structure. The corrugating structure must be able to demonstrate the target properties of < 10 mOhm-cm2 electrical resistance at > 20 psi compressive strength over the active area, in combination with offering at least 80% of power density that can be achieved by using the same MEA in a flat plate structure. Corrugated membrane fuel cell structures also have the potential to meet DOE power density targets by essentially packaging more membrane area into the same fuel cell volume as compared to conventional stack constructions.

Grot, Stephen [President, Ion Power Inc.] President, Ion Power Inc.

2013-09-30T23:59:59.000Z

230

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and fuel cells offer great  

E-Print Network (OSTI)

and electricity for fuel cell and plug-in hybrid electric vehicles while using proven stationary fuel cell technol vehicles with its own fuel cell technology. Currently, advanced vehicle technologies are being evalu- ated in addition to hydrogen fuel for local demonstration fuel cell vehicles. As advanced vehicles begin to enter

231

Negative Electrodes Improve Safety in Lithium Cells and Batteries...  

NLE Websites -- All DOE Office Websites (Extended Search)

Negative Electrodes Improve Safety in Lithium Cells and Batteries Technology available for licensing: Enhanced stability at a lower cost negativeelectrodes...

232

Hydrogen Fuel Cell Engines  

E-Print Network (OSTI)

the batteries, and to power accessories like the air condi- tioner and heater. Hybrid electric cars can exceed#12;#12;Hydrogen Fuel Cell Engines MODULE 8: FUEL CELL HYBRID ELECTRIC VEHICLES CONTENTS 8.1 HYBRID ELECTRIC VEHICLES .................................................................................. 8-1 8

233

Manufacturing of Low-Cost, Durable Membrane Electrode Assemblies Engineered for Rapid Conditioning - DOE Hydrogen and Fuel Cells Program FY 2012 Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 FY 2012 Annual Progress Report DOE Hydrogen and Fuel Cells Program F. Colin Busby W.L. Gore & Associates, Inc (Gore) Gore Electrochemical Technologies Team 201 Airport Road Elkton, MD 21921 Phone: (410) 392-3200 Email: CBusby@WLGore.com DOE Managers HQ: Nancy Garland Phone: (202) 586-5673 Email: Nancy.Garland@ee.doe.gov GO: Jesse Adams Phone: (720) 356-1421 Email: Jesse.Adams@go.doe.gov Contract Number: DE-FСЗ6-08G018052 Subcontractors: * UTC Power, South Windsor, CT * University of Delaware, Newark, DE (UD) * University of Tennessee, Knoxville, TN (UTK) Project Start Date: October 1, 2008 Project End Date: June 30, 2014

234

Low Temperature PEM Fuel Cell Manufacturing Needs  

NLE Websites -- All DOE Office Websites (Extended Search)

PEM Fuel Cell PEM Fuel Cell Manufacturing Needs Presented by Duarte Sousa, PE Manufacturing Fuel Cell Manhattan Project  Cost drivers were identified for the following: * MEA * Plates * Balance of Plant (BOP) * Fuel Processing Manufacturing Fuel Cell Project - Phase 1 Note that this presentation will be MEA centric as this is the working group I represent...  MEA Cost Drivers Identified: Identifying MEA Cost Drivers * The MEA was readily identified as the major cost driver in a 10 kW stationary stack. * The precious metal catalyst electrode is the major cost driver for the MEA. Thus, focus cost reduction efforts on MEA manufacturing methods. Identify gaps in MEA manufacturing technology: How much better can we do? Note: Cost reductions realized from both material price reduction

235

Solid Oxide Fuel Cell Power Generation Systems  

Science Conference Proceedings (OSTI)

An increasing worldwide demand for premium power, emerging trend towards electric utility deregulation and distributed power generation, global environmental concerns and regulatory controls have accelerated the development of advanced fuel cell based power generation systems. Fuel cells convert chemical energy to electrical energy through electrochemical oxidation of gaseous and/or liquid fuels ranging from hydrogen to hydrocarbons. Electrochemical oxidation of fuels prevents the formation of Nox, while the higher efficiency of the systems reduces carbon dioxide emissions (kg/kWh). Among various fuel cell power generation systems currently being developed for stationary and mobile applications, solid oxide fuel cells (SOFC) offer higher efficiency (up to 80% overall efficiency in hybrid configurations), fuel flexibility, tolerance to CO poisoning, modularity, and use of non-noble construction materials of low strategic value. Tubular, planar, and monolithic cell and stack configurations are currently being developed for stationary and military applications. The current generation of fuel cells uses doped zirconia electrolyte, nickel cermet anode, doped Perovskite cathode electrodes and predominantly ceramic interconnection materials. Fuel cells and cell stacks operate in a temperature range of 800-1000 *C. Low cost ($400/kWe), modular (3-10kWe) SOFC technology development approach of the Solid State Energy Conversion Alliance (SECA) initiative of the USDOE will be presented and discussed. SOFC technology will be reviewed and future technology development needs will be addressed.

Singh, Prabhakar; Pederson, Larry R.; Simner, Steve P.; Stevenson, Jeffry W.; Viswanathan, Vish V.

2001-05-12T23:59:59.000Z

236

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Technologies and Products Supported by the Fuel Cell Technologies Office, finds DOE funding has led to more than 360 hydrogen and fuel cell patents, 36 commercial...

237

NREL: Hydrogen and Fuel Cells Research - Fuel Cell System Contaminants...  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell System Contaminants Material Screening Data NREL designed this interactive material selector tool to help fuel cell developers and material suppliers explore the results...

238

Fuel Cell Technologies Office: Reversible Fuel Cells Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

of Reversible Fuel Cell Systems at Proton Energy, Mr. Everett Anderson, PROTON ON SITE Regenerative Fuel Cells for Energy Storage, Mr. Corky Mittelsteadt, Giner Electrochemical...

239

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Research, Development and Demonstration Plan* to someone by E-mail Share Fuel Cell Technologies Office: Fuel Cell Technologies Office Multi-Year Research, Development and...

240

Fuel Cell Technologies Office: Early Adoption of Fuel Cell Technologie...  

NLE Websites -- All DOE Office Websites (Extended Search)

Adoption of Fuel Cell Technologies Federal Facilities Guide Read Procuring Fuel Cells for Stationary Power: A Guide for Federal Facility Decision Makers for step-by-step guidance...

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Efficiency and Renewable Energy EERE Home | Programs & Offices | Consumer Information Fuel Cell Technologies Office Search Search Help Fuel Cell Technologies Office HOME...

242

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

offices, including Fuel Cell Technologies. Funding Opportunities SBIRSTTR Phase I Release 1 Technical Topics Announced for FY14-Hydrogen and Fuel Cell Topics Include...

243

Extended Two Dimensional Nanotube and Nanowire Surfaces as Fuel Cell Catalysts  

E-Print Network (OSTI)

for a thinner electrode catalyst layer, thereby improvingmass transport and catalyst utilization. ReferencesSurfaces as Fuel Cell Catalysts A Dissertation submitted in

Alia, Shaun Michael

2011-01-01T23:59:59.000Z

244

Solid oxide fuel cell operable over wide temperature range  

DOE Patents (OSTI)

Solid oxide fuel cells having improved low-temperature operation are disclosed. In one embodiment, an interfacial layer of terbia-stabilized zirconia is located between the air electrode and electrolyte of the solid oxide fuel cell. The interfacial layer provides a barrier which controls interaction between the air electrode and electrolyte. The interfacial layer also reduces polarization loss through the reduction of the air electrode/electrolyte interfacial electrical resistance. In another embodiment, the solid oxide fuel cell comprises a scandia-stabilized zirconia electrolyte having high electrical conductivity. The scandia-stabilized zirconia electrolyte may be provided as a very thin layer in order to reduce resistance. The scandia-stabilized electrolyte is preferably used in combination with the terbia-stabilized interfacial layer. The solid oxide fuel cells are operable over wider temperature ranges and wider temperature gradients in comparison with conventional fuel cells.

Baozhen, Li (Essex Junction, VT); Ruka, Roswell J. (Pittsburgh, PA); Singhal, Subhash C. (Murrysville, PA)

2001-01-01T23:59:59.000Z

245

Six cell 'single cell' stack diagnostics and membrane electrode assembly evaluation  

DOE Green Energy (OSTI)

Polymer electrolyte fuel cells are promising candidates as energy conversion devices in applications from portable power to stationary applications or electric vehicles. In order to achieve practical voltage, power and energy density, stacks are employed for almost all applications. Here, we present a six-cell 'single cell' stack in which individual cells can be isolated from the stack by current carrying leads found within each of the bipolar plates. The current carrying leads allow individual cells to be isolated from the rest of the stack, so that cells can either be tested together or independently. The design of the stack, utility for specific applications, including stack diagnostics and membrane electrode assembly (MEA) testing, and some experimental results, obtained using the stack, are presented. Special focus is given in this paper to the area of direct methanol fuel cell (DMFC) stacks, however the equipment and many of the experimental results presented are appropriate for other fuel cell systems.

Pivovar, B. S. (Bryan Scott); Le Scornet, F. (Francois); Eickes, C. (Christian); Zawodzinski, C. (Christine); Purdy, G. M. (Geraldine M.); Wilson, M. S. (Mahlon S.); Zelenay, P. (Piotr)

2002-01-01T23:59:59.000Z

246

Fuel cell stack arrangements  

DOE Patents (OSTI)

Arrangements of stacks of fuel cells and ducts, for fuel cells operating with separate fuel, oxidant and coolant streams. An even number of stacks are arranged generally end-to-end in a loop. Ducts located at the juncture of consecutive stacks of the loop feed oxidant or fuel to or from the two consecutive stacks, each individual duct communicating with two stacks. A coolant fluid flows from outside the loop, into and through cooling channels of the stack, and is discharged into an enclosure duct formed within the loop by the stacks and seals at the junctures at the stacks.

Kothmann, Richard E. (Churchill Boro, PA); Somers, Edward V. (Murrysville, PA)

1982-01-01T23:59:59.000Z

247

Batteries and Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

Collage of electric cars, plug, battery research lab Collage of electric cars, plug, battery research lab Batteries and Fuel Cells EETD researchers study the basic science and development of advanced batteries and fuel cells for transportation, electric grid storage, and other stationary applications. This research is aimed at developing more environmentally friendly technologies for generating and storing energy, including better batteries and fuel cells. Li-Ion and Other Advanced Battery Technologies Research conducted here on battery technology is aimed at developing low-cost rechargeable advanced electrochemical batteries for both automotive and stationary applications. The goal of fuel cell research is to provide the technologies for the successful commercialization of polymer-electrolyte and solid oxide fuel

248

DOE Fuel Cell Technologies Office  

NLE Websites -- All DOE Office Websites (Extended Search)

500 2007 2013 Cumulative Number of Patents Fuel Cells ProductionDelivery Storage * DOE funding has led to 40 commercial hydrogen and fuel cell technologies and 65 emerging...

249

Fuel Cell Technologies Office: Multimedia  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Efficiency and Renewable Energy EERE Home | Programs & Offices | Consumer Information Fuel Cell Technologies Office Search Search Help Fuel Cell Technologies Office HOME...

250

Fuel Cell Technologies Office: Budget  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Efficiency and Renewable Energy EERE Home | Programs & Offices | Consumer Information Fuel Cell Technologies Office Search Search Help Fuel Cell Technologies Office HOME...

251

Fuel Cells | Open Energy Information  

Open Energy Info (EERE)

Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Fuel Cells Jump to: navigation, search TODO: Add description List of Fuel Cells Incentives...

252

Fuel Cell Technologies Office: Education  

NLE Websites -- All DOE Office Websites (Extended Search)

& Local Governments For Early Adopters For Students & Educators Careers in Hydrogen & Fuel Cells Quick Links Hydrogen Production Hydrogen Delivery Hydrogen Storage Fuel Cells...

253

Fuel processing for fuel cell powered vehicles.  

DOE Green Energy (OSTI)

A number of auto companies have announced plans to have fuel cell powered vehicles on the road by the year 2004. The low-temperature polymer electrolyte fuel cells to be used in these vehicles require high quality hydrogen. Without a hydrogen-refueling infrastructure, these vehicles need to convert the available hydrocarbon fuels into a hydrogen-rich gas on-board the vehicle. Earlier analysis has shown that fuel processors based on partial oxidation reforming are well suited to meet the size and weight targets and the other performance-related needs of on-board fuel processors for light-duty fuel cell vehicles (1).

Ahmed, S.; Wilkenhoener, R.; Lee, S. H. D.; Carter, J. D.; Kumar, R.; Krumpelt, M.

1999-01-22T23:59:59.000Z

254

Low hydrostatic head electrolyte addition to fuel cell stacks  

DOE Patents (OSTI)

A fuel cell and system for supply electrolyte, as well as fuel and an oxidant to a fuel cell stack having at least two fuel cells, each of the cells having a pair of spaced electrodes and a matrix sandwiched therebetween, fuel and oxidant paths associated with a bipolar plate separating each pair of adjacent fuel cells and an electrolyte fill path for adding electrolyte to the cells and wetting said matrices. Electrolyte is flowed through the fuel cell stack in a back and forth fashion in a path in each cell substantially parallel to one face of opposite faces of the bipolar plate exposed to one of the electrodes and the matrices to produce an overall head uniformly between cells due to frictional pressure drop in the path for each cell free of a large hydrostatic head to thereby avoid flooding of the electrodes. The bipolar plate is provided with channels forming paths for the flow of the fuel and oxidant on opposite faces thereof, and the fuel and the oxidant are flowed along a first side of the bipolar plate and a second side of the bipolar plate through channels formed into the opposite faces of the bipolar plate, the fuel flowing through channels formed into one of the opposite faces and the oxidant flowing through channels formed into the other of the opposite faces.

Kothmann, Richard E. (Churchill Boro, PA)

1983-01-01T23:59:59.000Z

255

DOE Hydrogen and Fuel Cells Program: 2004 Annual Progress Report - Fuel  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells Fuel Cells Printable Version 2004 Annual Progress Report IV. Fuel Cells Each individual technical report is available as an individual Adobe Acrobat PDF for easier use. Download Adobe Reader. Fuel Cells Sub-Program Review, Patrick Davis, DOE (PDF 265 KB) A. MEAs and Catalysts Integrated Manufacturing for Advanced Membrane Electrode Assemblies, Emory DeCastro, De Nora (PDF 486 KB) Development of High-Temperature Membranes and Improved Cathode Catalysts Jeremy Meyers, UTC (PDF 595 KB) Advanced MEAs for Enhanced Operating Conditions, Amenable to High Volume Manufacture, Mark Debe, 3M (PDF 372 KB) Back to Top B. Membranes and MEAs High Temperature Polymer Membranes for Fuel Cells, Tom Zawodzinski, Case West Res. University (PDF 356 KB) Electrodes for Hydrogen-Air PEM Fuel Cells, Francisco Uribe, LANL

256

Performance Assessment of Single Electrode-Supported Solid Oxide Cells Operating in the Steam Electrolysis Mode  

DOE Green Energy (OSTI)

An experimental study is under way to assess the performance of electrode-supported solid-oxide cells operating in the steam electrolysis mode for hydrogen production. Results presented in this paper were obtained from single cells, with an active area of 16 cm{sup 2} per cell. The electrolysis cells are electrode-supported, with yttria-stabilized zirconia (YSZ) electrolytes ({approx}10 {mu}m thick), nickel-YSZ steam/hydrogen electrodes ({approx}1400 {mu}m thick), and modified LSM or LSCF air-side electrodes ({approx}90 {mu}m thick). The purpose of the present study is to document and compare the performance and degradation rates of these cells in the fuel cell mode and in the electrolysis mode under various operating conditions. Initial performance was documented through a series of voltage-current (VI) sweeps and AC impedance spectroscopy measurements. Degradation was determined through long-term testing, first in the fuel cell mode, then in the electrolysis mode. Results generally indicate accelerated degradation rates in the electrolysis mode compared to the fuel cell mode, possibly due to electrode delamination. The paper also includes details of an improved single-cell test apparatus developed specifically for these experiments.

X. Zhang; J. E. O'Brien; R. C. O'Brien; N. Petigny

2011-11-01T23:59:59.000Z

257

Fuel Cell Technologies Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

4/3/2012 4/3/2012 eere.energy.gov Fuel Cell Technologies Overview Flow Cell Workshop Washington, DC Dr. Sunita Satyapal & Dr. Dimitrios Papageorgopoulos U.S. Department of Energy Fuel Cell Technologies Program 3/7/2011 Flow Cells for Energy Storage Workshop Purpose To understand the applied research and development needs and the grand challenges for the use of flow cells as energy-storage devices. Objectives 1. Understand the needs for applied research from stakeholders. 2. Gather input for future development of roadmaps and technical targets for flow cells for various applications. 3. Identify grand challenges and prioritize R&D needs. Flow cells combine the unique advantages of batteries and fuel cells and can offer benefits for multiple energy storage applications.

258

Fuel cell generator energy dissipator  

DOE Patents (OSTI)

An apparatus and method are disclosed for eliminating the chemical energy of fuel remaining in a fuel cell generator when the electrical power output of the fuel cell generator is terminated. During a generator shut down condition, electrically resistive elements are automatically connected across the fuel cell generator terminals in order to draw current, thereby depleting the fuel

Veyo, Stephen Emery (Murrysville, PA); Dederer, Jeffrey Todd (Valencia, PA); Gordon, John Thomas (Ambridge, PA); Shockling, Larry Anthony (Pittsburgh, PA)

2000-01-01T23:59:59.000Z

259

Electrorefining cell with parallel electrode/concentric cylinder cathode  

DOE Patents (OSTI)

A cathode-anode arrangement for use in an electrolytic cell is adapted for electrochemically refining spent nuclear fuel from a nuclear reactor and recovering purified uranium and a mixture of uranium and plutonium for use as a fresh blanket and core fuel in a nuclear reactor. The arrangement includes a plurality of inner anodic dissolution baskets that are each attached to a respective support rod, are submerged in a molten lithium halide salt, and are rotationally displaced. An inner hollow cylindrical-shaped cathode is concentrically disposed about the inner anodic dissolution baskets. Concentrically disposed about the inner cathode in a spaced manner are a plurality of outer anodic dissolution baskets, while an outer hollow cylindrical-shaped cathode is disposed about the outer anodic dissolution baskets. Uranium is deposited from the anode baskets in a uniform cylindrical shape on the inner and outer cathode cylinders by rotating the anode baskets within the molten lithium halide salt. Scrapers located on each anode basket abrade and remove the spent fuel deposits on the surfaces of the inner and outer cathode cylinders, with the spent fuel falling to the bottom of the cell for removal. Cell resistance is reduced and uranium collection efficiency enhanced by increasing the electrode area and reducing the anode-cathode spacing for enhanced trapping and recovery of uranium dendrites scraped off of the cylindrical cathodes which may be greater in number than two.

Gay, E.C.; Miller, W.E.; Laidler, J.J.

1995-12-31T23:59:59.000Z

260

Electrocatalysis issues in polymer electrolyte fuel cells  

DOE Green Energy (OSTI)

Various electrocatalysis issues of impotance to low platinum loading polymer electrolyte fuel cells (PEFCs) are discussed. Thin film catalyst layer assemblies are used to investigate the effects of CO and CO{sub 2} on the anode as well as efforts to restore performance by oxygen bleeding into the anode feedstream. These electrodes behave differently than ionomer-impregnated E-TEK electrodes because the extra, exposed Pt in the latter case. The tolerance of Pt-Ru alloy thin film anodes to CO and CO{sub 2} are also evaluated. Thin film electrodes are also used to study Pt particle growth in aged electrodes as well as particle size effects on specific activity.

Wilson, M.S.; Derouin, C.R.; Valerio, J.A.; Gottesfeld, S.

1993-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Electrocatalysis issues in polymer electrolyte fuel cells  

DOE Green Energy (OSTI)

Various electrocatalysis issues of impotance to low platinum loading polymer electrolyte fuel cells (PEFCs) are discussed. Thin film catalyst layer assemblies are used to investigate the effects of CO and CO[sub 2] on the anode as well as efforts to restore performance by oxygen bleeding into the anode feedstream. These electrodes behave differently than ionomer-impregnated E-TEK electrodes because the extra, exposed Pt in the latter case. The tolerance of Pt-Ru alloy thin film anodes to CO and CO[sub 2] are also evaluated. Thin film electrodes are also used to study Pt particle growth in aged electrodes as well as particle size effects on specific activity.

Wilson, M.S.; Derouin, C.R.; Valerio, J.A.; Gottesfeld, S.

1993-01-01T23:59:59.000Z

262

Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

USCAR FUEL CELL TECH TEAM USCAR FUEL CELL TECH TEAM CELL COMPONENT ACCELERATED STRESS TEST PROTOCOLS FOR PEM FUEL CELLS (Electrocatalysts, Supports, Membranes, and Membrane Electrode Assemblies) Revised May 26, 2010 Fuel cells, especially for automotive propulsion, must operate over a wide range of operating and cyclic conditions. The desired operating range encompasses temperatures from below the freezing point to well above the boiling point of water, humidity from ambient to saturated, and half-cell potentials from 0 to >1.5 volts. Furthermore, the anode side of the cell may be exposed to hydrogen and air during different parts of the driving and startup/shutdown cycles. The severity in operating conditions is greatly exacerbated by the transient and cyclic nature of

263

Fuel Cell Technologies Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

States Energy Advisory Board (STEAB) States Energy Advisory Board (STEAB) Washington, DC Dr. Sunita Satyapal U.S. Department of Energy Fuel Cell Technologies Program Program Manager 3/14/2012 2 | Fuel Cell Technologies Program Source: US DOE 3/19/2013 eere.energy.gov * Introduction - Technology and Market Overview * DOE Program Overview - Mission & Structure - R&D Progress - Demonstration & Deployments * State Activities - Examples of potential opportunities Outline 3 | Fuel Cell Technologies Program Source: US DOE 3/19/2013 eere.energy.gov Fuel cells - convert chemical energy directly into electrical energy, bypassing inefficiencies associated with thermal energy conversion. Available energy is equal to the Gibbs free energy. Combustion Engines - convert chemical energy into thermal energy and

264

Hydrogen & Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy (DOE) is the lead federal agency for applied research and development (R&D) of cutting edge hydrogen and fuel cell technologies. DOE supports R&D that makes it...

265

Hydrogen and Fuel Cells  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy (DOE) is the lead federal agency for applied research and development (R&D) of cutting edge hydrogen and fuel cell technologies. DOE supports R&D that makes it...

266

Energy Basics: Fuel Cell Vehicles  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

EERE: Energy Basics Fuel Cell Vehicles Photo of a blue car with 'The Road to Hydrogen' written on it, filling up at a hydrogen fueling station. Fuel cell vehicles, powered by...

267

Fuel cell with electrolyte matrix assembly  

DOE Patents (OSTI)

This invention is directed to a fuel cell employing a substantially immobilized electrolyte imbedded therein and having a laminated matrix assembly disposed between the electrodes of the cell for holding and distributing the electrolyte. The matrix assembly comprises a non-conducting fibrous material such as silicon carbide whiskers having a relatively large void-fraction and a layer of material having a relatively small void-fraction.

Kaufman, Arthur (West Orange, NJ); Pudick, Sheldon (Sayreville, NJ); Wang, Chiu L. (Edison, NJ)

1988-01-01T23:59:59.000Z

268

Fuel cell end plate structure  

DOE Patents (OSTI)

The end plates (16) of a fuel cell stack (12) are formed of a thin membrane. Pressure plates (20) exert compressive load through insulation layers (22, 26) to the membrane. Electrical contact between the end plates (16) and electrodes (50, 58) is maintained without deleterious making and breaking of electrical contacts during thermal transients. The thin end plate (16) under compressive load will not distort with a temperature difference across its thickness. Pressure plate (20) experiences a low thermal transient because it is insulated from the cell. The impact on the end plate of any slight deflection created in the pressure plate by temperature difference is minimized by the resilient pressure pad, in the form of insulation, therebetween.

Guthrie, Robin J. (East Hartford, CT); Katz, Murray (Newington, CT); Schroll, Craig R. (Glastonbury, CT)

1991-04-23T23:59:59.000Z

269

Solid polymer MEMS-based fuel cells  

DOE Patents (OSTI)

A micro-electro-mechanical systems (MEMS) based thin-film fuel cells for electrical power applications. The MEMS-based fuel cell may be of a solid oxide type (SOFC), a solid polymer type (SPFC), or a proton exchange membrane type (PEMFC), and each fuel cell basically consists of an anode and a cathode separated by an electrolyte layer. The electrolyte layer can consist of either a solid oxide or solid polymer material, or proton exchange membrane electrolyte materials may be used. Additionally catalyst layers can also separate the electrodes (cathode and anode) from the electrolyte. Gas manifolds are utilized to transport the fuel and oxidant to each cell and provide a path for exhaust gases. The electrical current generated from each cell is drawn away with an interconnect and support structure integrated with the gas manifold. The fuel cells utilize integrated resistive heaters for efficient heating of the materials. By combining MEMS technology with thin-film deposition technology, thin-film fuel cells having microflow channels and full-integrated circuitry can be produced that will lower the operating temperature an will yield an order of magnitude greater power density than the currently known fuel cells.

Jankowski, Alan F. (Livermore, CA); Morse, Jeffrey D. (Pleasant Hill, CA)

2008-04-22T23:59:59.000Z

270

Seventh Edition Fuel Cell Handbook  

DOE Green Energy (OSTI)

Provides an overview of fuel cell technology and research projects. Discusses the basic workings of fuel cells and their system components, main fuel cell types, their characteristics, and their development status, as well as a discussion of potential fuel cell applications.

NETL

2004-11-01T23:59:59.000Z

271

Breakthrough Vehicle Development - Fuel Cells  

Fuel Cell Technologies Publication and Product Library (EERE)

Document describing research and development program for fuel cell power systems for transportation applications.

272

FUEL CELL TECHNOLOGIES PROGRAM Technologies  

E-Print Network (OSTI)

.eere.energy.gov/informationcenter hydrogen and electricity for fuel cell and plug-in hybrid electric vehicles while using proven stationary vehicles with its own fuel cell technology. Currently, advanced vehicle technologies are being evalu- ated and fuel cells offer great promise for our energy future. Fuel cell vehicles are not yet commercially

273

Argonne TDC: Fuel Cell Technologies  

Emergency Response. Engineering. Environmental Research. Fuel Cells. Imaging Technology. Material Science. Nanotechnology. Physical Sciences. Sensor ...

274

Creep resistant, metal-coated LiFeO[sub 2] anodes for molten carbonated fuel cells  

DOE Patents (OSTI)

A porous, creep-resistant, metal-coated, LiFeO[sub 2] ceramic electrode for fuel cells is disclosed. The electrode is particularly useful for molten carbonate fuel cells (MCFC) although it may have utilities in solid oxide fuel cells (SOFC) as well. 11 figs.

Khandkar, A.C.

1994-08-23T23:59:59.000Z

275

Creep resistant, metal-coated LiFeO.sub.2 anodes for molten carbonated fuel cells  

DOE Patents (OSTI)

A porous, creep-resistant, metal-coated, LiFeO.sub.2 ceramic electrode for fuel cells is disclosed. The electrode is particularly useful for molten carbonate fuel cells (MCFC) although it may have utilities in solid oxide fuel cells (SOFC) as well.

Khandkar, Ashok C. (Salt Lake City, UT)

1994-01-01T23:59:59.000Z

276

Fuel cells: applied research fuel cell materials and electrocatalysis. Annual report, January 1976--December 1976  

DOE Green Energy (OSTI)

Research is described on electrocatalysis of fuel cell reactions including the topics (1) mixed oxides as oxygen electrodes, (2) electrolyte effects on the oxygen reduction reaction, (3) anion effects on the oxygen reduction reaction, and (4) selection and evaluation of electrocatalysts for oxygen reduction in KHCO/sub 3//K/sub 2/CO/sub 3/ buffered electrolytes. Phosphoric acid fuel cell studies include inhibition of sintering of fuel cell catalyst particles: electrochemical methods for surface regeneration and temperature effects on the oxygen reduction reaction at platinum in phosphoric acid electrolyte. Research on the characterization of overpotentials of solid electrolyte fuel cells and selection and evaluation of interconnector materials for solid electrolyte fuel cells is summarized. (WHK)

Srinivasan, S; Isaacs, H S

1977-09-01T23:59:59.000Z

277

Electrochemical sensor for monitoring electrochemical potentials of fuel cell components  

DOE Patents (OSTI)

An electrochemical sensor comprised of wires, a sheath, and a conduit can be utilized to monitor fuel cell component electric potentials during fuel cell shut down or steady state. The electrochemical sensor contacts an electrolyte reservoir plate such that the conduit wicks electrolyte through capillary action to the wires to provide water necessary for the electrolysis reaction which occurs thereon. A voltage is applied across the wires of the electrochemical sensor until hydrogen evolution occurs at the surface of one of the wires, thereby forming a hydrogen reference electrode. The voltage of the fuel cell component is then determined with relation to the hydrogen reference electrode.

Kunz, Harold R. (Vernon, CT); Breault, Richard D. (Coventry, CT)

1993-01-01T23:59:59.000Z

278

Fuel Cell Technologies Program Overview  

E-Print Network (OSTI)

Cell TypesFuel Cell Types Note: ITSOFC is intermediate temperature SOFC and TSOFC is tubular SOFC #12

279

Fuel Cell Technologies Office: Presentations  

NLE Websites -- All DOE Office Websites (Extended Search)

Presentations to Presentations to someone by E-mail Share Fuel Cell Technologies Office: Presentations on Facebook Tweet about Fuel Cell Technologies Office: Presentations on Twitter Bookmark Fuel Cell Technologies Office: Presentations on Google Bookmark Fuel Cell Technologies Office: Presentations on Delicious Rank Fuel Cell Technologies Office: Presentations on Digg Find More places to share Fuel Cell Technologies Office: Presentations on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings Annual Merit Review Proceedings Workshop & Meeting Proceedings Webinars Data Records Databases Glossary Quick Links Hydrogen Production Hydrogen Delivery Hydrogen Storage Fuel Cells

280

Fuel Cell Technologies Office: Glossary  

NLE Websites -- All DOE Office Websites (Extended Search)

Glossary to someone by Glossary to someone by E-mail Share Fuel Cell Technologies Office: Glossary on Facebook Tweet about Fuel Cell Technologies Office: Glossary on Twitter Bookmark Fuel Cell Technologies Office: Glossary on Google Bookmark Fuel Cell Technologies Office: Glossary on Delicious Rank Fuel Cell Technologies Office: Glossary on Digg Find More places to share Fuel Cell Technologies Office: Glossary on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings Webinars Data Records Databases Glossary Quick Links Hydrogen Production Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems Analysis Contacts Glossary

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Biomass Fuel Cell Systems - DOE Hydrogen and Fuel Cells Program...  

NLE Websites -- All DOE Office Websites (Extended Search)

Utilize ceramic microchannel reactor technology for * reforming of natural gas and biogas fuels for subsequent electrochemical oxidation within a solid-oxide fuel cell (SOFC)....

282

Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

& & Renewable Energy Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities Pete Devlin Fuel Cell Technologies Program United States Department of Energy Federal Utility Partnership Working Group April 14 th , 2010 2 * DOE Fuel Cell Market Transformation Overview * Overview of CHP Concept * Stationary Fuel Cells for CHP Applications * Partnering and Financing (Sam Logan) * Example Project Outline 3 Fuel Cells: Addressing Energy Challenges Energy Efficiency and Resource Diversity  Fuel cells offer a highly efficient way to use diverse fuels and energy sources. Greenhouse Gas Emissions and Air Pollution:  Fuel cells can be powered by emissions-free fuels that are produced from clean, domestic resources. Stationary Power (including CHP & backup power)

283

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

fuel cell devices to charge electronics such as cell phones and audio players. EERE funding for hydrogen and fuel cells has led to more than 450 patents, 60 commercial...

284

Method of making MEA for PEM/SPE fuel cell  

DOE Patents (OSTI)

A method of making a membrane-electrode-assembly (MEA) for a PEM/SPE fuel cell comprising applying a slurry of electrode-forming material directly onto a membrane-electrolyte film. The slurry comprises a liquid vehicle carrying catalyst particles and a binder for the catalyst particles. The membrane-electrolyte is preswollen by contact with the vehicle before the electrode-forming slurry is applied to the membrane-electrolyte. The swollen membrane-electrolyte is constrained against shrinking in the "x" and "y" directions during drying. Following assembly of the fuel cell, the MEA is rehydrated inside the fuel cell such that it swells in the "z" direction for enhanced electrical contact with contiguous electrically conductive components of the fuel cell.

Hulett, Jay S. (West Henrietta, NY)

2000-01-01T23:59:59.000Z

285

Semitransparent Organic Photovoltaic Cells with Laminated Top Electrode  

E-Print Network (OSTI)

Semitransparent Organic Photovoltaic Cells with Laminated Top Electrode Jung-Yong Lee, Steve T demonstrate semitransparent small molecular weight organic photovoltaic cells using a laminated silver electrodes, nanowires O rganic photovoltaic cells are considered a promis- ing solar cell technology because

Cui, Yi

286

Fuel cell system  

DOE Patents (OSTI)

A fuel cell system is comprised of a fuel cell module including sub-stacks of series-connected fuel cells, the sub-stacks being held together in a stacked arrangement with cold plates of a cooling means located between the sub-stacks to function as electrical terminals. The anode and cathode terminals of the sub-stacks are connected in parallel by means of the coolant manifolds which electrically connect selected cold plates. The system may comprise a plurality of the fuel cell modules connected in series. The sub-stacks are designed to provide a voltage output equivalent to the desired voltage demand of a low voltage, high current DC load such as an electrolytic cell to be driven by the fuel cell system. This arrangement in conjunction with switching means can be used to drive a DC electrical load with a total voltage output selected to match that of the load being driven. This arrangement eliminates the need for expensive voltage regulation equipment.

Early, Jack (Perth Amboy, NJ); Kaufman, Arthur (West Orange, NJ); Stawsky, Alfred (Teaneck, NJ)

1982-01-01T23:59:59.000Z

287

Oxide modified air electrode surface for high temperature electrochemical cells  

DOE Patents (OSTI)

An electrochemical cell is made having a porous cermet electrode (16) and a porous lanthanum manganite electrode (14), with solid oxide electrolyte (15) between them, where the lanthanum manganite surface next to the electrolyte contains a thin discontinuous layer of high surface area cerium oxide and/or praseodymium oxide, preferably as discrete particles (30) in contact with the air electrode and electrolyte.

Singh, Prabhakar (Export, PA); Ruka, Roswell J. (Churchill Boro, Allegheny County, PA)

1992-01-01T23:59:59.000Z

288

Fuel processor for fuel cell power system  

DOE Patents (OSTI)

A catalytic organic fuel processing apparatus, which can be used in a fuel cell power system, contains within a housing a catalyst chamber, a variable speed fan, and a combustion chamber. Vaporized organic fuel is circulated by the fan past the combustion chamber with which it is in indirect heat exchange relationship. The heated vaporized organic fuel enters a catalyst bed where it is converted into a desired product such as hydrogen needed to power the fuel cell. During periods of high demand, air is injected upstream of the combustion chamber and organic fuel injection means to burn with some of the organic fuel on the outside of the combustion chamber, and thus be in direct heat exchange relation with the organic fuel going into the catalyst bed.

Vanderborgh, Nicholas E. (Los Alamos, NM); Springer, Thomas E. (Los Alamos, NM); Huff, James R. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

289

Electrolyte paste for molten carbonate fuel cells  

DOE Patents (OSTI)

The electrolyte matrix and electrolyte reservoir plates in a molten carbonate fuel cell power plant stack are filled with electrolyte by applying a paste of dry electrolyte powder entrained in a dissipatable carrier to the reactant flow channels in the current collector plate. The stack plates are preformed and solidified to final operating condition so that they are self sustaining and can be disposed one atop the other to form the power plant stack. Packing the reactant flow channels with the electrolyte paste allows the use of thinner electrode plates, particularly on the anode side of the cells. The use of the packed electrolyte paste provides sufficient electrolyte to fill the matrix and to entrain excess electrolyte in the electrode plates, which also serve as excess electrolyte reservoirs. When the stack is heated up to operating temperatures, the electrolyte in the paste melts, the carrier vaporizes, or chemically decomposes, and the melted electrolyte is absorbed into the matrix and electrode plates.

Bregoli, Lawrance J. (Southwick, MA); Pearson, Mark L. (New London, CT)

1995-01-01T23:59:59.000Z

290

Hydrogen Fuel Cell Engines  

E-Print Network (OSTI)

#12;#12;Hydrogen Fuel Cell Engines MODULE 11:GLOSSARY AND CONVERSIONS CONTENTS 11.1 GLOSSARY Cell Engines MODULE 11:GLOSSARY AND CONVERSIONS OBJECTIVES This module is for reference only. Hydrogen MODULE 11: GLOSSARY AND CONVERSIONS PAGE 11-1 11.1 Glossary This glossary covers words, phrases

291

Hawaii Fuel Cell Test Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Test Facility presented to DOE Hydrogen Codes and Standards Coordinating Committee Fuel Purity Specifications Workshop Renaissance Hollywood Hotel by Rick Rocheleau...

292

Fuel cell system combustor  

DOE Patents (OSTI)

A fuel cell system including a fuel reformer heated by a catalytic combustor fired by anode and cathode effluents. The combustor includes a turbulator section at its input end for intimately mixing the anode and cathode effluents before they contact the combustors primary catalyst bed. The turbulator comprises at least one porous bed of mixing media that provides a tortuous path therethrough for creating turbulent flow and intimate mixing of the anode and cathode effluents therein.

Pettit, William Henry (Rochester, NY)

2001-01-01T23:59:59.000Z

293

Handbook of fuel cell performance  

DOE Green Energy (OSTI)

The intent of this document is to provide a description of fuel cells, their performances and operating conditions, and the relationship between fuel processors and fuel cells. This information will enable fuel cell engineers to know which fuel processing schemes are most compatible with which fuel cells and to predict the performance of a fuel cell integrated with any fuel processor. The data and estimates presented are for the phosphoric acid and molten carbonate fuel cells because they are closer to commercialization than other types of fuel cells. Performance of the cells is shown as a function of operating temperature, pressure, fuel conversion (utilization), and oxidant utilization. The effect of oxidant composition (for example, air versus O/sub 2/) as well as fuel composition is examined because fuels provided by some of the more advanced fuel processing schemes such as coal conversion will contain varying amounts of H/sub 2/, CO, CO/sub 2/, CH/sub 4/, H/sub 2/O, and sulfur and nitrogen compounds. A brief description of fuel cells and their application to industrial, commercial, and residential power generation is given. The electrochemical aspects of fuel cells are reviewed. The phosphoric acid fuel cell is discussed, including how it is affected by operating conditions; and the molten carbonate fuel cell is discussed. The equations developed will help systems engineers to evaluate the application of the phosphoric acid and molten carbonate fuel cells to commercial, utility, and industrial power generation and waste heat utilization. A detailed discussion of fuel cell efficiency, and examples of fuel cell systems are given.

Benjamin, T.G.; Camara, E.H.; Marianowski, L.G.

1980-05-01T23:59:59.000Z

294

Internal reforming fuel cell assembly with simplified fuel feed  

DOE Patents (OSTI)

A fuel cell assembly in which fuel cells adapted to internally reform fuel and fuel reformers for reforming fuel are arranged in a fuel cell stack. The fuel inlet ports of the fuel cells and the fuel inlet ports and reformed fuel outlet ports of the fuel reformers are arranged on one face of the fuel cell stack. A manifold sealing encloses this face of the stack and a reformer fuel delivery system is arranged entirely within the region between the manifold and the one face of the stack. The fuel reformer has a foil wrapping and a cover member forming with the foil wrapping an enclosed structure.

Farooque, Mohammad (Huntington, CT); Novacco, Lawrence J. (Brookfield, CT); Allen, Jeffrey P. (Naugatuck, CT)

2001-01-01T23:59:59.000Z

295

Electrochemical fuel cell generator having an internal and leak tight hydrocarbon fuel reformer  

DOE Patents (OSTI)

An electrochemical fuel cell generator configuration is made having a generator section which contains a plurality of axially elongated fuel cells, each cell containing a fuel electrode, air electrode, and solid oxide electrolyte between the electrodes, in which axially elongated dividers separate portions of the fuel cells from each other, and where at least one divider also reforms a reformable fuel gas mixture prior to electricity generation reactions, the at least one reformer-divider is hollow having a closed end and an open end entrance for a reformable fuel mixture to pass to the closed end of the divider and then reverse flow and pass back along the hollowed walls to be reformed, and then finally to pass as reformed fuel out of the open end of the divider to contact the fuel cells, and further where the reformer-divider is a composite structure having a gas diffusion barrier of metallic foil surrounding the external walls of the reformer-divider except at the entrance to prevent diffusion of the reformable gas mixture through the divider, and further housed in an outer insulating jacket except at the entrance to prevent short-circuiting of the fuel cells by the gas diffusion barrier. 10 figs.

Dederer, J.T.; Hager, C.A.

1998-03-31T23:59:59.000Z

296

Electrochemical fuel cell generator having an internal and leak tight hydrocarbon fuel reformer  

DOE Patents (OSTI)

An electrochemical fuel cell generator configuration is made having a generator section which contains a plurality of axially elongated fuel cells, each cell containing a fuel electrode, air electrode, and solid oxide electrolyte between the electrodes, in which axially elongated dividers separate portions of the fuel cells from each other, and where at least one divider also reforms a reformable fuel gas mixture prior to electricity generation reactions, the at least one reformer-divider is hollow having a closed end and an open end entrance for a reformable fuel mixture to pass to the closed end of the divider and then reverse flow and pass back along the hollowed walls to be reformed, and then finally to pass as reformed fuel out of the open end of the divider to contact the fuel cells, and further where the reformer-divider is a composite structure having a gas diffusion barrier of metallic foil surrounding the external walls of the reformer-divider except at the entrance to prevent diffusion of the reformable gas mixture through the divider, and further housed in an outer insulating jacket except at the entrance to prevent short-circuiting of the fuel cells by the gas diffusion barrier.

Dederer, Jeffrey T. (Valencia, PA); Hager, Charles A. (Mars, PA)

1998-01-01T23:59:59.000Z

297

Electrochemical cell apparatus having axially distributed entry of a fuel-spent fuel mixture transverse to the cell lengths  

DOE Patents (OSTI)

An electrochemical apparatus is made having a generator section containing axially elongated electrochemical cells, a fresh gaseous feed fuel inlet, a gaseous feed oxidant inlet, and at least one gaseous spent fuel exit channel, where the spent fuel exit channel passes from the generator chamber to combine with the fresh feed fuel inlet at a mixing apparatus, reformable fuel mixture channel passes through the length of the generator chamber and connects with the mixing apparatus, that channel containing entry ports within the generator chamber, where the axis of the ports is transverse to the fuel electrode surfaces, where a catalytic reforming material is distributed near the reformable fuel mixture entry ports. 2 figures.

Reichner, P.; Dollard, W.J.

1991-01-08T23:59:59.000Z

298

Fuel Cells & Renewable Portfolio Standards  

E-Print Network (OSTI)

.....................................................12 SOFC Battery Range Extender Auxiliary Power Unit (SOFC) as Military APU Replacements" (presentation, DOD-DOE Workshop on Fuel Cells in Aviation cell plasma lighting demonstration, a solid oxide fuel cell (SOFC) battery range extender APU

299

Polarization Resistance of La0.85Ca0.15MnO3 Cathodes for Solid Oxide Fuel Cells (SOFCs) Measured Using Patterned Electrodes  

SciTech Connect

Patterned cathodes of calcium-doped lanthanum manganite (LCM) were fabricated on polycrystalline yttria-stabilized zirconia (YSZ) substrates by RF magnetron sputtering and photolithographic techniques. Samples were generated with a constant electrode/electrolyte contact area but different three phase boundary (TPB) lengths (lTPB's). Electrochemical impedance spectroscopy (EIS) was performed in the oxygen partial pressure (pO2) and temperature range of 10-3 atm to 1.00 atm and 600-800 C respectively. The area specific polarization resistance, Rp, was found to scale linearly with the inverse of lTPB, suggesting that the TPB is the active region for oxygen reduction. The resistivity decreased with increased temperature and pO2 and showed an activation energy of 1.17 +/- 0.03 eV.

Miara, Lincoln J.; Yoon, Kyung J.; Topping, Stephen; Saraf, Laxmikant V.; Pal, Uday B.; Gopalan, Srikanth

2010-04-25T23:59:59.000Z

300

Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure  

NLE Websites -- All DOE Office Websites (Extended Search)

International Hydrogen International Hydrogen Fuel and Pressure Vessel Forum to someone by E-mail Share Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure Vessel Forum on Facebook Tweet about Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure Vessel Forum on Twitter Bookmark Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure Vessel Forum on Google Bookmark Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure Vessel Forum on Delicious Rank Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure Vessel Forum on Digg Find More places to share Fuel Cell Technologies Office: International Hydrogen Fuel and Pressure Vessel Forum on AddThis.com... Publications Program Publications Technical Publications

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text  

NLE Websites -- All DOE Office Websites (Extended Search)

Delivery and Delivery and Fueling (Text Alternative Version) to someone by E-mail Share Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text Alternative Version) on Facebook Tweet about Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text Alternative Version) on Twitter Bookmark Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text Alternative Version) on Google Bookmark Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text Alternative Version) on Delicious Rank Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text Alternative Version) on Digg Find More places to share Fuel Cell Technologies Office: Hydrogen Delivery and Fueling (Text Alternative Version) on AddThis.com... Publications Program Publications

302

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel  

E-Print Network (OSTI)

- tions, distributed power generation, and cogeneration (in which excess heat released during electricity the imported petroleum we currently use in our cars and trucks. Why Fuel Cells? Fuel cells directly convert the chemical energy in hydrogen to electricity, with pure water and potentially useful heat as the only

303

Layered Electrodes for Lithium Cells and Batteries | Argonne...  

NLE Websites -- All DOE Office Websites (Extended Search)

Layered Electrodes for Lithium Cells and Batteries Technology available for licensing: Layered lithium metal oxide compounds for ultra-high-capacity, rechargeable cathodes...

304

PEM FUEL CELL TURBOCOMPRESSOR  

DOE Green Energy (OSTI)

The objective is to assist the Department of Energy in the development of a low cost, reliable and high performance air compressor/expander. Technical Objective 1: Perform a turbocompressor systems PEM fuel cell trade study to determine the enhanced turbocompressor approach. Technical Objective 2: Using the results from technical objective 1, an enhanced turbocompressor will be fabricated. The design may be modified to match the flow requirements of a selected fuel cell system developer. Technical Objective 3: Design a cost and performance enhanced compact motor and motor controller. Technical Objective 4: Turbocompressor/motor controller development.

Mark K. Gee

2004-04-01T23:59:59.000Z

305

Yttria-stabilized zirconia solid oxide electrolyte fuel cells--- monolithic solid oxide fuel cells  

DOE Green Energy (OSTI)

The monolithic solid oxide fuel cell (MSOFC) is currently under development for a variety of applications including coal-based power generation. The MSOFC is a design concept that places the thin components of a solid oxide fuel cell in lightweight, compact, corrugated structure, and so achieves high efficiency and excellent performance simultaneously with high power density. The MSOFC can be integrated with coal gasification plants and is expected to have high overall efficiency in the conversion of the chemical energy of coal to electrical energy. This report describes work aimed at (1) assessing manufacturing costs for the MSOFC and system costs for a coal-based plant; (2) modifying electrodes and electrode/electrolyte interfaces to improve the electrochemical performance of the MSOFC; and (3) testing the performance of the MSOFC on hydrogen and simulated coal gas. Manufacturing costs for both the coflow and crossflow MSOFC's were assessed based on the fabrication flow charts developed by direct scaleup of tape calendering and other laboratory processes. Integrated coal-based MSOFC systems were investigated to determine capital costs and costs of electricity. Design criteria were established for a coal-fueled 200-Mw power plant. Four plant arrangements were evaluated, and plant performance was analyzed. Interfacial modification involved modification of electrodes and electrode/electrolyte interfaces to improve the MSOFC electrochemical performance. Work in the cathode and cathode/electrolyte interface was concentrated on modification of electrode porosity, electrode morphology, electrode material, and interfacial bonding. Modifications of the anode and anode/electrolyte interface included the use of additives and improvement of nickel distribution. Single cells have been tested for their electrochemical performance. Performance data were typically obtained with humidified H{sub 2} or simulated coal gas and air or oxygen. 68 figs., 29 tabs.

Not Available

1990-10-01T23:59:59.000Z

306

Fuel Cell Technologies Office: Joint Fuel Cell Bus Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Bus Workshop Fuel Cell Bus Workshop The U.S. Department of Energy (DOE) and the U.S. Department of Transportation (DOT) held a Fuel Cell Bus Workshop on June 7, 2010 in Washington, D.C. in conjunction with the DOE Hydrogen and Fuel Cell Program Annual Merit Review. The workshop plenary and breakout session brought together technical experts from industry, end users, academia, DOE national laboratories, and other government agencies to address the status and technology needs of fuel cell powered buses. Meeting Summary Joint Fuel Cell Bus Workshop Summary Report Presentations Fuel Cell Bus Workshop Overview & Purpose, Dimitrios Papageorgopoulos, DOE Users Perspective on Advanced Fuel Cell Bus Technology, Nico Bouwkamp, CaFCP and Leslie Eudy, NREL Progress and Challenges for PEM Transit Fleet Applications, Tom Madden, UTC Power, LLC

307

DOE Hydrogen and Fuel Cells Program: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Technologies Office FY2014 Budget Request Briefing on April 12 Apr 9, 2013 The Fuel Cell Technologies Office will hold a budget briefing for stakeholders on Friday, April...

308

Fuel Cell Technologies Office: Hydrogen and Fuel Cell Manufacturing...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Fuel Cell Manufacturing R&D Workshop The National Renewable Energy Laboratory (NREL) hosted a Hydrogen and Fuel Cell Manufacturing R&D Workshop August 11-12, 2011, in...

309

Fuel Cell Technologies Office: Biogas and Fuel Cells Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Biogas and Fuel Cells Workshop The U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) held a Biogas and Fuel Cells Workshop June 11-13, 2012, in...

310

Fuel Cell Technologies Office: New Fuel Cell Projects Meeting  

NLE Websites -- All DOE Office Websites (Extended Search)

Agenda (PDF 83 KB) New Fuel Cell Projects Overview (PDF 1.2 MB), P. Davis, DOE New Fuel Cell Projects Overview (PDF 609 KB), N. Garland, DOE Membranes Membranes and MEAs for Dry,...

311

NREL: Hydrogen and Fuel Cells Research - Fuel Cell Electric Vehicle...  

NLE Websites -- All DOE Office Websites (Extended Search)

the cost and increasing the performance of fuel cell propulsion systems, and most major vehicle manufacturers are geared to launch fuel cell electric vehicles in the U.S. market...

312

DOE Hydrogen and Fuel Cells Program: Hydrogen and Fuel Cells...  

NLE Websites -- All DOE Office Websites (Extended Search)

Hydrogen and Fuel Cells Program Presents Annual Merit Review Awards May 21, 2013 The U.S. Department of Energy's (DOE's) Hydrogen and Fuel Cells Program presented its annual awards...

313

Nanodisperse transition metal electrodes (NTME) for electrochemical cells  

DOE Patents (OSTI)

Disclosed are transition metal electrodes for electrochemical cells using gel-state and solid-state polymers. The electrodes are suitable for use in primary and secondary cells. The electrodes (either negative electrode or positive electrode) are characterized by uniform dispersion of the transition metal at the nanoscale in the polymer. The transition metal moiety is structurally amorphous, so no capacity fade should occur due to lattice expansion/contraction mechanisms. The small grain size, amorphous structure and homogeneous distribution provide improved charge/discharge cycling performance, and a higher initial discharge rate capability. The cells can be cycled at high current densities, limited only by the electrolyte conductivity. A method of making the electrodes (positive and negative), and their usage in electrochemical cells are disclosed.

Striebel, Kathryn A.; Wen, Shi-Jie

1998-12-01T23:59:59.000Z

314

Nanodisperse transition metal electrodes (NTME) for electrochemical cells  

DOE Patents (OSTI)

Disclosed are transition metal electrodes for electrochemical cells using gel-state and solid-state polymers. The electrodes are suitable for use in primary and secondary cells. The electrodes (either negative electrode or positive electrode) are characterized by uniform dispersion of the transition metal at the nanoscale in the polymer. The transition metal moiety is structurally amorphous, so no capacity fade should occur due to lattice expansion/contraction mechanisms. The small grain size, amorphous structure and homogeneous distribution provide improved charge/discharge cycling performance, and a higher initial discharge rate capability. The cells can be cycled at high current densities, limited only by the electrolyte conductivity. A method of making the electrodes (positive and negative), and their usage in electrochemical cells are disclosed.

Striebel, Kathryn A. (Oakland, CA); Wen, Shi-Jie (Sunnyvale, CA)

2000-01-01T23:59:59.000Z

315

Fuel Cell Technologies Office: Technology Validation  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Technologies Office: Technology Validation to someone by E-mail Share Fuel Cell Technologies Office: Technology Validation on Facebook Tweet about Fuel Cell Technologies...

316

Hydrogen, Fuel Cells, & Infrastructure - Program Areas - Energy...  

NLE Websites -- All DOE Office Websites (Extended Search)

fuel cell Welcome> Program Areas> Program Areas Hydrogen, Fuel Cells & Infrastructure Production & Delivery | Storage | Fuel Cell R&D | Systems Integration & Analysis | Safety...

317

Microfluidic Microbial Fuel Cells for Microstructure Interrogations  

E-Print Network (OSTI)

Sediment microbial fuel cells demonstrating marine (left)Model of hydrogen fuel cell kinetic losses including5 FutureWork 5.1 Microfluidic Microbial Fuel Cell Continued

Parra, Erika Andrea

2010-01-01T23:59:59.000Z

318

Canadian Fuel Cell Commercialization Roadmap Update: Progress...  

Open Energy Info (EERE)

Fuel Cell Commercialization Roadmap Update: Progress of Canada's Hydrogen and Fuel Cell Industry Jump to: navigation, search Name Canadian Fuel Cell Commercialization Roadmap...

319

Compact fuel cell  

DOE Patents (OSTI)

A novel electrochemical cell which may be a solid oxide fuel cell (SOFC) is disclosed where the cathodes (144, 140) may be exposed to the air and open to the ambient atmosphere without further housing. Current collector (145) extends through a first cathode on one side of a unit and over the unit through the cathode on the other side of the unit and is in electrical contact via lead (146) with housing unit (122 and 124). Electrical insulator (170) prevents electrical contact between two units. Fuel inlet manifold (134) allows fuel to communicate with internal space (138) between the anodes (154 and 156). Electrically insulating members (164 and 166) prevent the current collector from being in electrical contact with the anode.

Jacobson, Craig (Moraga, CA); DeJonghe, Lutgard C. (Lafayette, CA); Lu, Chun (Richland, WA)

2010-10-19T23:59:59.000Z

320

Wick-and-pool electrodes for electrochemical cell  

DOE Patents (OSTI)

An electrode system includes a reservoir of liquid-metal reactant, and a wick extending from a submersed location within the reservoir into the molten electrolyte of an electrochemical cell structure. The wick is flooded with the liquid metal and thereby serves as one electrode within the cell. This electrode system has application in high-temperature batteries employing molten alkali metals or their alloys as active material within an electrode submersed within a molten salt electrolyte. It also can be used in electrochemical cells where the purification, separation or electrowinning of liquid metals is accomplished.

Roche, Michael F. (Downers Grove, IL); Faist, Suzan M. (Haddonfield, NJ); Eberhart, James G. (Naperville, IL); Ross, Laurids E. (Naperville, IL)

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Wick-and-pool electrodes for electrochemical cell  

DOE Patents (OSTI)

An electrode system includes a reservoir of liquid-metal reactant, and a wick extending from a submersed location within the reservoir into the molten electrolyte of an electrochemical cell structure. The wick is flooded with the liquid metal and thereby serves as one electrode within the cell. This electrode system has application in high-temperature batteries employing molten alkali metals or their alloys as active material within an electrode submersed within a molten salt electrolyte. It also can be used in electrochemical cells where the purification, separation or electrowinning of liquid metals is accomplished.

Roche, Michael F. (Downers Grove, IL); Faist, Suzan M. (Norwood, NJ); Eberhart, James G. (Naperville, IL); Ross, Laurids E. (Naperville, IL)

1977-01-01T23:59:59.000Z

322

Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Fuel Cell Vehicle Tax Fuel Cell Vehicle Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit on Google Bookmark Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit on Delicious Rank Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Fuel Cell Vehicle Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Fuel Cell Vehicle Tax Credit South Carolina residents that claim the federal fuel cell vehicle tax credit are eligible for a state income tax credit equal to 20% of the

323

Fuel cell stack with internal manifolds for reactant gases  

DOE Patents (OSTI)

A fuel cell stack includes a plurality of plate-like fuel cells arranged along an axis generally parallel to cell thickness with electrically conductive separator plates between each pair of cells. A plurality of axial manifolds are provided at opposite sides of the stack in outer marginal portions beyond the edges of electrodes and electrolyte tiles. Sealing rings prevent cross-leakage of oxidant fuel gases through use of pairs of outwardly extending lips from opposite tile surfaces bonded to first and second electrode frames respectively. The frames provide transition between electrode edges and manifold perimeters. The pairs of extension lips are sealingly bonded together through an electrically insulative sealing ring with wedge shaped fastening members.

Schnacke, A.W.

1983-10-12T23:59:59.000Z

324

Fuel cell stack with internal manifolds for reactant gases  

DOE Patents (OSTI)

A fuel cell stack includes a plurality of plate-like fuel cells arranged along an axis generally parallel to cell thickness with electrically conductive separator plates between each pair of cells. A plurality of axial manifolds are provided at opposite sides of the stack in outer marginal portions beyond the edges of electrodes and electrolyte tiles. Sealing rings prevent cross-leakage of oxidant fuel gases through use of pairs of outwardly extending lips from opposite tile surfaces bonded to first and second electrode frames respectively. The frames provide transition between electrode edges and manifold perimeters. The pairs of extension lips are sealingly bonded together through an electrically insulative sealing ring with wedge shaped fastening members.

Schnacke, Arthur W. (Schenectady, NY)

1985-01-01T23:59:59.000Z

325

Organic fuel cells and fuel cell conducting sheets  

DOE Patents (OSTI)

A passive direct organic fuel cell includes an organic fuel solution and is operative to produce at least 15 mW/cm.sup.2 when operating at room temperature. In additional aspects of the invention, fuel cells can include a gas remover configured to promote circulation of an organic fuel solution when gas passes through the solution, a modified carbon cloth, one or more sealants, and a replaceable fuel cartridge.

Masel, Richard I. (Champaign, IL); Ha, Su (Champaign, IL); Adams, Brian (Savoy, IL)

2007-10-16T23:59:59.000Z

326

Preparation and characterization of solid electrolytes for solid oxide fuel cells. Quarterly report, January 1, 1997--June 30, 1997  

DOE Green Energy (OSTI)

During this period, attempts were made to measure the surface and electrochemical properties of rare-earth dopants in ceria for solid oxide fuel cells and cathodic electrodes.

Rambabu, B.

1997-08-01T23:59:59.000Z

327

Fuel Cell Technologies Office: Multimedia  

NLE Websites -- All DOE Office Websites (Extended Search)

uses of fuel cell technologies. MotorWeek H2 on the Horizon Video Learn how car makers, energy suppliers, and the government are bringing fuel cell electric vehicles and hydrogen...

328

Fuel Cell Technologies Office: Databases  

NLE Websites -- All DOE Office Websites (Extended Search)

Efficiency and Renewable Energy Fuel Cell Technologies Office Databases The Fuel Cell Technologies Office is developing databases to make it easier for users to find up-to-date...

329

Fuel Cell Projects Kickoff Meeting  

NLE Websites -- All DOE Office Websites (Extended Search)

of Cost-Competitive Fuel Cell Stacks James Cross, Nuvera 4:30 Fuel Cell Fundamentals at Low and Subzero Temperatures Adam Weber, LBNL 4:50 Development and Validation of...

330

Fuel Cell Technologies Office: Events  

NLE Websites -- All DOE Office Websites (Extended Search)

Events Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Events to someone by E-mail Share Fuel Cell Technologies Office: Events on Facebook Tweet...

331

DOE Fuel Cell Subprogram (Presentation)  

NLE Websites -- All DOE Office Websites (Extended Search)

* By 2010, develop a fuel cell system for consumer electronics (<50 W) with an energy density of 1,000 WhL. * By 2010, develop a fuel cell system for auxiliary power units (3-30...

332

2009 Fuel Cell Market Report  

Fuel Cell Technologies Publication and Product Library (EERE)

Fuel cells are electrochemical devices that combine hydrogen and oxygen to produce electricity, water, and heat. Unlike batteries, fuel cells continuously generate electricity, as long as a source of

333

Energy Conversion/Fuel Cells  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, Materials Science & Technology 2011. Symposium, Energy Conversion/Fuel Cells. Sponsorship, MS&T Organization.

334

Fuel Cell Technologies Office: Webinars  

NLE Websites -- All DOE Office Websites (Extended Search)

Databases Glossary Quick Links Hydrogen Production Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Codes & Standards Education Systems...

335

Supporting R&D of industrial fuel cell developers.  

DOE Green Energy (OSTI)

Argonne National Laboratory is supporting the industrial developers of molten carbonate fuel cells (MCFCs) and tubular solid oxide fuel cells (SOFCs). The results suggest that a lithium concentration level of 65-75 mol% in the LiNa electrolyte will improve cell performance. They have made inroads in understanding the interfacial resistance of bipolar plate materials, and they have reduced the air electrode overpotential in OSFCs by adding dopants.

Krumpelt, M.

1998-09-11T23:59:59.000Z

336

Cornell Fuel Cell Institute: Materials Discovery to Enable Fuel Cell Technologies  

SciTech Connect

The discovery and understanding of new, improved materials to advance fuel cell technology are the objectives of the Cornell Fuel Cell Institute (CFCI) research program. CFCI was initially formed in 2003. This report highlights the accomplishments from 2006-2009. Many of the grand challenges in energy science and technology are based on the need for materials with greatly improved or even revolutionary properties and performance. This is certainly true for fuel cells, which have the promise of being highly efficient in the conversion of chemical energy to electrical energy. Fuel cells offer the possibility of efficiencies perhaps up to 90 % based on the free energy of reaction. Here, the challenges are clearly in the materials used to construct the heart of the fuel cell: the membrane electrode assembly (MEA). The MEA consists of two electrodes separated by an ionically conducting membrane. Each electrode is a nanocomposite of electronically conducting catalyst support, ionic conductor and open porosity, that together form three percolation networks that must connect to each catalyst nanoparticle; otherwise the catalyst is inactive. This report highlights the findings of the three years completing the CFCI funding, and incudes developments in materials for electrocatalyts, catalyst supports, materials with structured and functional porosity for electrodes, and novel electrolyte membranes. The report also discusses developments at understanding electrocatalytic mechanisms, especially on novel catalyst surfaces, plus in situ characterization techniques and contributions from theory. Much of the research of the CFCI continues within the Energy Materials Center at Cornell (emc2), a DOE funded, Office of Science Energy Frontier Research Center (EFRC).

Abruna, H.D.; DiSalvo, Francis J.

2012-06-29T23:59:59.000Z

337

Fuel cell sub-assembly  

DOE Patents (OSTI)

A fuel cell sub-assembly comprising a plurality of fuel cells, a first section of a cooling means disposed at an end of the assembly and means for connecting the fuel cells and first section together to form a unitary structure.

Chi, Chang V. (Brookfield, CT)

1983-01-01T23:59:59.000Z

338

Commercialization of fuel-cells  

DOE Green Energy (OSTI)

This report is an abbreviated version of the ''Report of the DOE Advanced Fuel Cell Commercialization Working Group (AFC2WG),'' released January 1995. We describe fuel-cell commercialization for stationary power applications of phosphoric acid, molten carbonate, solid oxide, and polymer electrolyte membrane fuel cells.

Penner, S.S.; Appleby, A.J.; Baker, B.S.; Bates, J.L.; Buss, L.B.; Dollard, W.J.; Farris, P.J.; Gillis, E.A.; Gunsher, J.A.; Khandkar, A.; Krumpelt, M.; O'Sullivan, J.B.; Runte, G.; Savinell, R.F.; Selman, J.R.; Shores, D.A.; Tarman, P.

1995-03-01T23:59:59.000Z

339

Fuel Cell Handbook, Fourth Edition  

SciTech Connect

Robust progress has been made in fuel cell technology since the previous edition of the Fuel Cell Handbook was published in January 1994. This Handbook provides a foundation in fuel cells for persons wanting a better understanding of the technology, its benefits, and the systems issues that influence its application. Trends in technology are discussed, including next-generation concepts that promise ultra high efficiency and low cost, while providing exceptionally clean power plant systems. Section 1 summarizes fuel cell progress since the last edition and includes existing power plant nameplate data. Section 2 addresses the thermodynamics of fuel cells to provide an understanding of fuel cell operation at two levels (basic and advanced). Sections 3 through 6 describe the four major fuel cell types and their performance based on cell operating conditions. The section on polymer electrolyte membrane fuel cells has been added to reflect their emergence as a significant fuel cell technology. Phosphoric acid, molten carbonate, and solid oxide fuel cell technology description sections have been updated from the previous edition. New information indicates that manufacturers have stayed with proven cell designs, focusing instead on advancing the system surrounding the fuel cell to lower life cycle costs. Section 7, Fuel Cell Systems, has been significantly revised to characterize near-term and next-generation fuel cell power plant systems at a conceptual level of detail. Section 8 provides examples of practical fuel cell system calculations. A list of fuel cell URLs is included in the Appendix. A new index assists the reader in locating specific information quickly.

Stauffer, D.B; Hirschenhofer, J.H.; Klett, M.G.; Engleman, R.R.

1998-11-01T23:59:59.000Z

340

Fuel Cell Handbook, Fourth Edition  

DOE Green Energy (OSTI)

sections have been updated from the previous edition. New information indicates that manufacturers have stayed with proven cell designs, focusing instead on advancing the system surrounding the fuel cell to lower life cycle costs. Section 7, Fuel Cell Systems, has been significantly revised to characterize near-term and next-generation fuel cell power plant systems at a conceptual level of detail. Section 8 provides examples of practical fuel cell system calculations. A list of fuel cell URLs is included in the Appendix. A new index assists the reader in locating specific information quickly.

Stauffer, D.B; Hirschenhofer, J.H.; Klett, M.G.; Engleman, R.R.

1998-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Fuel cell membrane humidification  

DOE Patents (OSTI)

A polymer electrolyte membrane fuel cell assembly has an anode side and a cathode side separated by the membrane and generating electrical current by electrochemical reactions between a fuel gas and an oxidant. The anode side comprises a hydrophobic gas diffusion backing contacting one side of the membrane and having hydrophilic areas therein for providing liquid water directly to the one side of the membrane through the hydrophilic areas of the gas diffusion backing. In a preferred embodiment, the hydrophilic areas of the gas diffusion backing are formed by sewing a hydrophilic thread through the backing. Liquid water is distributed over the gas diffusion backing in distribution channels that are separate from the fuel distribution channels.

Wilson, Mahlon S. (Los Alamos, NM)

1999-01-01T23:59:59.000Z

342

Fuel Cell Handbook, Fifth Edition  

DOE Green Energy (OSTI)

Progress continues in fuel cell technology since the previous edition of the Fuel Cell Handbook was published in November 1998. Uppermost, polymer electrolyte fuel cells, molten carbonate fuel cells, and solid oxide fuel cells have been demonstrated at commercial size in power plants. The previously demonstrated phosphoric acid fuel cells have entered the marketplace with more than 220 power plants delivered. Highlighting this commercial entry, the phosphoric acid power plant fleet has demonstrated 95+% availability and several units have passed 40,000 hours of operation. One unit has operated over 49,000 hours. Early expectations of very low emissions and relatively high efficiencies have been met in power plants with each type of fuel cell. Fuel flexibility has been demonstrated using natural gas, propane, landfill gas, anaerobic digester gas, military logistic fuels, and coal gas, greatly expanding market opportunities. Transportation markets worldwide have shown remarkable interest in fuel cells; nearly every major vehicle manufacturer in the U.S., Europe, and the Far East is supporting development. This Handbook provides a foundation in fuel cells for persons wanting a better understanding of the technology, its benefits, and the systems issues that influence its application. Trends in technology are discussed, including next-generation concepts that promise ultrahigh efficiency and low cost, while providing exceptionally clean power plant systems. Section 1 summarizes fuel cell progress since the last edition and includes existing power plant nameplate data. Section 2 addresses the thermodynamics of fuel cells to provide an understanding of fuel cell operation at two levels (basic and advanced). Sections 3 through 8 describe the six major fuel cell types and their performance based on cell operating conditions. Alkaline and intermediate solid state fuel cells were added to this edition of the Handbook. New information indicates that manufacturers have stayed with proven cell designs, focusing instead on advancing the system surrounding the fuel cell to lower life cycle costs. Section 9, Fuel Cell Systems, has been significantly revised to characterize near-term and next-generation fuel cell power plant systems at a conceptual level of detail. Section 10 provides examples of practical fuel cell system calculations. A list of fuel cell URLs is included in the Appendix. A new index assists the reader in locating specific information quickly.

Energy and Environmental Solutions

2000-10-31T23:59:59.000Z

343

Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel  

NLE Websites -- All DOE Office Websites (Extended Search)

Market Transformation Market Transformation Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel Cell Projects to someone by E-mail Share Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel Cell Projects on Facebook Tweet about Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel Cell Projects on Twitter Bookmark Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel Cell Projects on Google Bookmark Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel Cell Projects on Delicious Rank Fuel Cell Technologies Office: Financial Incentives for Hydrogen and Fuel Cell Projects on Digg Find More places to share Fuel Cell Technologies Office: Financial

344

Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP)  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

National Fuel Cell Bus National Fuel Cell Bus Program (NFCBP) to someone by E-mail Share Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP) on Facebook Tweet about Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP) on Twitter Bookmark Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP) on Google Bookmark Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP) on Delicious Rank Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP) on Digg Find More places to share Alternative Fuels Data Center: National Fuel Cell Bus Program (NFCBP) on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type National Fuel Cell Bus Program (NFCBP) The goal of the NFCBP is to facilitate the development of commercially

345

Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Fuel Cell Motor Fuel Cell Motor Vehicle Tax Deduction to someone by E-mail Share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Facebook Tweet about Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Twitter Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Google Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Delicious Rank Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on Digg Find More places to share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Deduction on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Fuel Cell Motor Vehicle Tax Deduction A taxpayer is eligible for a $2,000 tax deduction for the purchase of a

346

Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Hydrogen and Fuel Cell Hydrogen and Fuel Cell Tax Exemption to someone by E-mail Share Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption on Facebook Tweet about Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption on Twitter Bookmark Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption on Google Bookmark Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption on Delicious Rank Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption on Digg Find More places to share Alternative Fuels Data Center: Hydrogen and Fuel Cell Tax Exemption on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Hydrogen and Fuel Cell Tax Exemption The following are exempt from state sales tax: 1) any device, equipment, or

347

Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Fuel Cell Motor Fuel Cell Motor Vehicle Tax Credit to someone by E-mail Share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Facebook Tweet about Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Twitter Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Google Bookmark Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Delicious Rank Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on Digg Find More places to share Alternative Fuels Data Center: Fuel Cell Motor Vehicle Tax Credit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Fuel Cell Motor Vehicle Tax Credit A tax credit of up to $4,000 is available for the purchase of qualified

348

Electrical contact structures for solid oxide electrolyte fuel cell  

DOE Patents (OSTI)

An improved electrical output connection means is provided for a high temperature solid oxide electrolyte type fuel cell generator. The electrical connection of the fuel cell electrodes to the electrical output bus, which is brought through the generator housing to be connected to an electrical load line maintains a highly uniform temperature distribution. The electrical connection means includes an electrode bus which is spaced parallel to the output bus with a plurality of symmetrically spaced transversely extending conductors extending between the electrode bus and the output bus, with thermal insulation means provided about the transverse conductors between the spaced apart buses. Single or plural stages of the insulated transversely extending conductors can be provided within the high temperatures regions of the fuel cell generator to provide highly homogeneous temperature distribution over the contacting surfaces.

Isenberg, Arnold O. (Forest Hills, PA)

1984-01-01T23:59:59.000Z

349

Energy savings by means of fuel cell electrodes in electro-chemical industries. Progress report, November 1, 1979-January 31, 1980  

DOE Green Energy (OSTI)

Zinc electrowinning data, obtained with hydrogen depolarized anodes operating in a plant feed electrolyte at 55/sup 0/C, are presented in this quarterly report for investigations involving the following: performance of an anode containing a low platinum loading, i.e. 0.09 mg/cm/sup 2/ instead of the typical 0.33 mg/cm/sup 2/, and an anode catalyzed with palladium instead of platinum; establishment of a feed and bleed system to maintain a constant electrolyte composition; exploratory experiments on the effect of the rate and mode of electrolyte flow on the quality of the zinc plate at high current densities; performance of the anode with feeds of varying degrees of purification pre-treatment, and containing either 50 or 150 g/l Zn/sup + +/; the effect upon cell voltage of decreasing the hydrogen flowrate to the anode by dilution of the feed gas with nitrogen; the effect upon cell voltage of increasing the back pressure of the hydrogen gas fed to the anode; the effect upon energy consumption and current efficiency of varying the current density and the Zn/sup + +/ concentration; trace elemental analysis of a cathodic zinc plate of commercial-size thickness, as produced using the catalytic H/sub 2/ anode; further comparison of the effects of feed solution purification; and performance of four different Prototech Pt anodes.

Bar-Ilan, A.; Juda, W.; Allen, R.J.; Lindstrom, R.W.

1980-04-18T23:59:59.000Z

350

Single chamber fuel cells: Flow geometry, rate and composition considerations  

DOE Green Energy (OSTI)

Four different single chamber fuel cell designs were compared using propane-air gas mixtures. Gas flow around the electrodes has a significant influence on the open circuit voltage and the power density of the cell. The strong influence of flow geometry is likely due to its effect on gas composition, particularly on the oxygen chemical potential at the two electrodes as a result of gas mixing. The chamber design which exposes the cathode first to the inlet gas was found to yield the best performance at lower flow rates, while the open tube design with the electrodes equally exposed to the inlet gas worked best at higher flow rates.

Stefan, Ionel C.; Jacobson, Craig P.; Visco, Steven J.; De Jonghe, Lutgard C.

2003-11-17T23:59:59.000Z

351

Alternative Fuels Data Center: Fuel Cell Electric Vehicles  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Hydrogen Hydrogen Printable Version Share this resource Send a link to Alternative Fuels Data Center: Fuel Cell Electric Vehicles to someone by E-mail Share Alternative Fuels Data Center: Fuel Cell Electric Vehicles on Facebook Tweet about Alternative Fuels Data Center: Fuel Cell Electric Vehicles on Twitter Bookmark Alternative Fuels Data Center: Fuel Cell Electric Vehicles on Google Bookmark Alternative Fuels Data Center: Fuel Cell Electric Vehicles on Delicious Rank Alternative Fuels Data Center: Fuel Cell Electric Vehicles on Digg Find More places to share Alternative Fuels Data Center: Fuel Cell Electric Vehicles on AddThis.com... More in this section... Hydrogen Basics Benefits & Considerations Stations Vehicles Availability Emissions Laws & Incentives Fuel Cell Electric Vehicles

352

Reformate fuel cell system durability  

DOE Green Energy (OSTI)

The goal of this research is to identify the factors limiting the durability of fuel cells and fuel processors. This includes identifying PEM fuel cell durability issues for operating on pure hydrogen, and those that arise from the fuel processing of liquid hydrocarbons (e.g., gasoline) as a function of fuel composition and impurity content. Benchmark comparisons with the durability of fuel cells operating on pure hydrogen are used to identify limiting factors unique to fuel processing. We describe the design, operation and operational results of the durability system, including the operating conditions for the system, fuel processor sub-section operation over 1000 hours, post-mortem characterization of the catalysts in the fuel processor, and single cell operation.

Borup, R. L. (Rodney L.); Inbody, M. A. (Michael A.); Uribe, F. A. (Francisco A.); Tafoya, J. (Jose I.)

2002-01-01T23:59:59.000Z

353

Carbonate fuel cell matrix  

DOE Patents (OSTI)

A carbonate fuel cell matrix is described comprising support particles and crack attenuator particles which are made platelet in shape to increase the resistance of the matrix to through cracking. Also disclosed is a matrix having porous crack attenuator particles and a matrix whose crack attenuator particles have a thermal coefficient of expansion which is significantly different from that of the support particles, and a method of making platelet-shaped crack attenuator particles. 8 figs.

Farooque, M.; Yuh, C.Y.

1996-12-03T23:59:59.000Z

354

Carbonate fuel cell matrix  

DOE Patents (OSTI)

A carbonate fuel cell matrix comprising support particles and crack attenuator particles which are made platelet in shape to increase the resistance of the matrix to through cracking. Also disclosed is a matrix having porous crack attenuator particles and a matrix whose crack attenuator particles have a thermal coefficient of expansion which is significantly different from that of the support particles, and a method of making platelet-shaped crack attenuator particles.

Farooque, Mohammad (Huntington, CT); Yuh, Chao-Yi (New Milford, CT)

1996-01-01T23:59:59.000Z

355

Energy Basics: Hydrogen and Fuel Cell Technologies  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydrogen Fuel Fuel Cells Hydropower Ocean Solar Wind Hydrogen and Fuel Cell...

356

Fuel Cell Technologies Office: About  

NLE Websites -- All DOE Office Websites (Extended Search)

About the Fuel Cell Technologies Office About the Fuel Cell Technologies Office The Fuel Cell Technologies Office conducts comprehensive efforts to overcome the technological, economic, and institutional barriers to the widespread commercialization of hydrogen and fuel cells. The office is aligned with the strategic vision and goals of the U.S. Department of Energy (DOE). The office's efforts will help secure U.S. leadership in clean energy technologies and advance U.S. economic competitiveness and scientific innovation. What We Do DOE is the lead federal agency for directing and integrating activities in hydrogen and fuel cell R&D as authorized in the Energy Policy Act of 2005. The Fuel Cell Technologies Office is responsible for coordinating the R&D activities for DOE's Hydrogen and Fuel Cells Program, which includes activities within four DOE offices (Office of Energy Efficiency and Renewable Energy [EERE], Office of Fossil Energy, Office of Nuclear Energy, and Office of Science).

357

Hydrogen and Fuel Cell Activities  

NLE Websites -- All DOE Office Websites (Extended Search)

8/5/2011 eere.energy.gov 8/5/2011 eere.energy.gov 5 th International Conference on Polymer Batteries & Fuel Cells Argonne, Illinois Hydrogen and Fuel Cell Activities Dr. Sunita Satyapal U.S. Department of Energy Fuel Cell Technologies Program Program Manager August 4, 2011 2 | Fuel Cell Technologies Program Source: US DOE 8/5/2011 eere.energy.gov Fuel Cells: Benefits & Market Potential The Role of Fuel Cells Key Benefits Very High Efficiency Reduced CO 2 Emissions * 35-50%+ reductions for CHP systems (>80% with biogas) * 55-90% reductions for light- duty vehicles * up to 60% (electrical) * up to 70% (electrical, hybrid fuel cell / turbine) * up to 85% (with CHP) Reduced Oil Use * >95% reduction for FCEVs (vs. today's gasoline ICEVs)

358

Fuel Cell Technologies Program Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

IEA HIA Hydrogen Safety Stakeholder IEA HIA Hydrogen Safety Stakeholder Workshop Bethesda, Maryland Fuel Cell Technologies Program Overview Dr. Sunita Satyapal U.S. Department of Energy Fuel Cell Technologies Program Program Manager 10/2/2012 2 | Fuel Cell Technologies Program eere.energy.gov Overview Fuel Cells - An Emerging Global Industry Clean Energy Patent Growth Index [1] shows that fuel cell patents lead in the clean energy field with over 950 fuel cell patents issued in 2011. * Nearly double the second place holder, solar, which has ~540 patents. [1] http://cepgi.typepad.com/files/cepgi-4th-quarter-2011-1.pdf United States 46% Germany 7% Korea 7% Canada 3% Taiwan 1% Great Britain 1% France 1% Other 3% Japan 31% Fuel Cell Patents Geographic Distribution 2002-2011 Top 10 companies: GM, Honda, Samsung,

359

Dupont Fuel Cells | Open Energy Information  

Open Energy Info (EERE)

Dupont Fuel Cells Dupont Fuel Cells Jump to: navigation, search Name Dupont Fuel Cells Place Wilmington, Delaware Zip DE 19880-0 Product A subsidiary of Dupont which specializes in fuel cell technology. It produces DuPontâ"¢ Nafion® membranes and dispersions to multilayer membrane electrode assemblies and specialty conductive plates for fuel cells. Coordinates 42.866922°, -72.868494° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.866922,"lon":-72.868494,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

360

DEVELOPMENT OF NOVEL ELECTROCATALYSTS FOR PROTON EXCHANGE MEMBRANE FUEL CELLS  

DOE Green Energy (OSTI)

The Proton Exchange Membrane Fuel Cell (PEMFC) is one of the most promising power sources for stand-alone utility and electric vehicle applications. Platinum (Pt) Catalyst is used for both fuel and air electrodes in PEMFCs. However, carbon monoxide (CO) contamination of H{sub 2} greatly affects electro catalysts used at the anode of PEMFCs and decreases cell performance. The irreversible poisoning of the anode can occur even in CO concentrations as low as few parts per million (ppm). In this work, we have synthesized several novel elctrocatalysts (Pt/C, Pt/Ru/C, Pt/Mo/C, Pt/Ir and Pt/Ru/Mo) for PEMFCs. These catalysts have been tested for CO tolerance in the H{sub 2}/air fuel cell, using CO concentrations in the H{sub 2} fuel that varies from 10 to 100 ppm. The performance of the electrodes was evaluated by determining the cell potential against current density. The effects of catalyst composition and electrode film preparation method on the performance of PEM fuel cell were also studied. It was found that at 70 C and 3.5 atm pressure at the cathode, Pt-alloy catalyst (10 wt% Pt/Ru/C, 20 wt% Pt/Mo/C) were more CO tolerant than the 20 wt% Pt/C catalyst alone. It was also observed that spraying method was better than the brushing technique for the preparation of electrode film.

Shamsuddin Ilias

2002-06-11T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Fuel cell with metal screen flow-field  

DOE Patents (OSTI)

A polymer electrolyte membrane (PEM) fuel cell is provided with electrodes supplied with a reactant on each side of a catalyzed membrane assembly (CMA). The fuel cell includes a metal mesh defining a rectangular flow-field pattern having an inlet at a first corner and an outlet at a second corner located on a diagonal from the first corner, wherein all flow paths from the inlet to the outlet through the square flow field pattern are equivalent to uniformly distribute the reactant over the CMA. In a preferred form of metal mesh, a square weave screen forms the flow-field pattern. In a particular characterization of the present invention, a bipolar plate electrically connects adjacent fuel cells, where the bipolar plate includes a thin metal foil having an anode side and a cathode side; a first metal mesh on the anode side of the thin metal foil; and a second metal mesh on the cathode side of the thin metal foil. In another characterization of the present invention, a cooling plate assembly cools adjacent fuel cells, where the cooling plate assembly includes an anode electrode and a cathode electrode formed of thin conducting foils; and a metal mesh flow field there between for distributing cooling water flow over the electrodes to remove heat generated by the fuel cells. 11 figs.

Wilson, M.S.; Zawodzinski, C.

1998-08-25T23:59:59.000Z

362

Gas Diffusion Electrodes for Fuel CellsGas Diffusion Electrodes ...  

the liquid methanol has high energy density and is easily transportable. However, one of the challenges with this process has been the large amount of methanol ...

363

Control of electrolyte fill to fuel cell stack  

DOE Patents (OSTI)

A fuel cell stack which can be operated with cells in a horizontal position so that the fuel cell stack does not have to be taken out of operation when adding an electrolyte such as an acid. Acid is supplied to each matrix in a stack of fuel cells at a uniform, low pressure so that the matrix can either be filled initially or replenished with acid lost in operation of the cell, without exceeding the bubble pressure of the matrix or the flooding pressure of the electrodes on either side of the matrix. Acid control to each cell is achieved by restricting and offsetting the opening of electrolyte fill holes in the matrix relative to openings in the plates which sandwich the matrix and electrodes therebetween.

Pollack, William (Scott Township, Allegheny County, PA)

1982-01-01T23:59:59.000Z

364

Fuel Cell Power Plant Experience Naval Applications  

NLE Websites -- All DOE Office Websites (Extended Search)

clean clean Fuel Cell Power Plant Experience Naval Applications US Department of Energy/ Office of Naval Research Shipboard Fuel Cell Workshop Washington, DC March 29, 2011 FuelCell Energy, the FuelCell Energy logo, Direct FuelCell and "DFC" are all registered trademarks (®) of FuelCell Energy, Inc. *FuelCell Energy, Inc. *Renewable and Liquid Fuels Experience *HTPEM Fuel Cell Stack for Shipboard APU *Solid Oxide Experience and Applications DOE-ONR Workshop FuelCell Energy, the FuelCell Energy logo, Direct FuelCell and "DFC" are all registered trademarks (®) of FuelCell Energy, Inc. FuelCell Energy, Inc. * Premier developer of fuel cell technology - founded in 1969 * Over 50 power installations in North America, Europe, and Asia * Industrial, commercial, utility

365

Method for producing electricity from a fuel cell having solid-oxide ionic electrolyte  

DOE Patents (OSTI)

Stabilized quadrivalent cation oxide electrolytes are employed in fuel cells at elevated temperatures with a carbon and/or hydrogen containing fuel anode and an oxygen cathode. The fuel cell is operated at elevated temperatures with conductive metallic coatings as electrodes and desirably having the electrolyte surface blackened. Of particular interest as the quadrivalent oxide is zirconia.

Mason, David M. (Los Altos, CA)

1984-01-01T23:59:59.000Z

366

NREL: Hydrogen and Fuel Cells Research - National Fuel Cell Technology  

NLE Websites -- All DOE Office Websites (Extended Search)

National Fuel Cell Technology Evaluation Center National Fuel Cell Technology Evaluation Center The National Fuel Cell Technology Evaluation Center (NFCTEC) at NREL's Energy Systems Integration Facility (ESIF) plays a crucial role in NREL's independent, third-party analysis of hydrogen fuel cell technologies in real-world operation. The NFCTEC is designed for secure management, storage, and processing of proprietary data from industry. Access to the off-network NFCTEC is limited to NREL's Technology Validation Team, which analyzes detailed data and reports on fuel cell technology status, progress, and technical challenges. Graphic representing NREL's Hydrogen Secure Data Center and the variety of applications from which it gathers data, including fuel cell (FC) stacks, FC backup power, FC forklifts, FC cars, FC buses, and FC prime power, and hydrogen infrastructure.

367

Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Hydrogen Hydrogen Printable Version Share this resource Send a link to Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability to someone by E-mail Share Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability on Facebook Tweet about Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability on Twitter Bookmark Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability on Google Bookmark Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability on Delicious Rank Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability on Digg Find More places to share Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Availability on AddThis.com... More in this section... Hydrogen Basics Benefits & Considerations

368

Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Hydrogen Hydrogen Printable Version Share this resource Send a link to Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions to someone by E-mail Share Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions on Facebook Tweet about Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions on Twitter Bookmark Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions on Google Bookmark Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions on Delicious Rank Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions on Digg Find More places to share Alternative Fuels Data Center: Hydrogen Fuel Cell Vehicle Emissions on AddThis.com... More in this section... Hydrogen Basics Benefits & Considerations Stations

369

Nanostructured Solid Oxide Fuel Cell Electrodes  

E-Print Network (OSTI)

connectivity during co-firing, limit YSZs oxygen ionwell bellow the usual co-firing temperatures. This conceptin turn affected in the co-firing process by the presence of

Sholklapper, Tal Zvi

2007-01-01T23:59:59.000Z

370

Magnetron cathodes in plasma electrode pockels cells  

DOE Patents (OSTI)

Magnetron cathodes, which produce high current discharges, form greatly improved plasma electrodes on each side of an electro-optic crystal. The plasma electrode has a low pressure gas region on both sides of the crystal. When the gas is ionized, e.g., by a glow discharge in the low pressure gas, the plasma formed is a good conductor. The gas electrode acts as a highly uniform conducting electrode. Since the plasma is transparent to a high energy laser beam passing through the crystal, the plasma is transparent. A crystal exposed from two sides to such a plasma can be charged up uniformly to any desired voltage. A typical configuration utilizes helium at 50 millitorr operating. pressure and 2 kA discharge current. The magnetron cathode produces a more uniform plasma and allows a reduced operating pressure which leads to lower plasma resistivity and a more uniform charge on the crystal.

Rhodes, Mark A. (Pleasanton, CA)

1995-01-01T23:59:59.000Z

371

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Multi-Year Research, Development and Demonstration Plan* The Fuel Cell Technologies Office Multi-Year Research, Development, and Demonstration (MYRD&D) Plan* describes the goals,...

372

NREL: Hydrogen and Fuel Cells Research - Fuel Cell Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

with a focus on improving the performance and durability and reducing the cost of fuel cell components and systems. Research efforts involve: Developing advanced catalysts,...

373

DOE Hydrogen and Fuel Cells Program: Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

portable power and auxiliary power applications in a limited fashion where earlier market entry would assist in the development of a fuel cell manufacturing base. This DOE...

374

Fuel Cell Technologies Office: Alkaline Membrane Fuel Cell Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Renewable Energy Laboratory Anion Exchange Membranes for Fuel Cells, Prof. Andrew Herring, Colorado School of Mines Electrocatalysis in Alkaline Electrolytes, Prof. Sanjeev...

375

NREL: Hydrogen and Fuel Cells Research - Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

high conductivity) for this application include tin oxide, indium tin oxide, and zinc oxide. Contact: Bryan Pivovar 303-275-3809 Printable Version Hydrogen & Fuel Cells Research...

376

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

Newsletter: August 2013 The August 2013 issue of the Fuel Cell Technologies Office newsletter includes stories in these categories: In the News Funding Opportunities Webinars and...

377

Fuel Cell Technologies Office: Fuel Cell Technologies Office...  

NLE Websites -- All DOE Office Websites (Extended Search)

hydrogen and fuel cells. This information is provided in documents such as technical and project reports, conference proceedings and journal articles, technical presentations, and...

378

Fuel Cell Technologies Office: Fuel Cells for Portable Power...  

NLE Websites -- All DOE Office Websites (Extended Search)

Session - Fuel Cell Portable Power Perspectives End User Perspective - Industry Consumer Electronics Power (PDF 1.51 MB) Jerry Hallmark, Motorola Portable Power Sources (above...

379

An advanced fuel cell simulator  

E-Print Network (OSTI)

Fuel cell power generation systems provide a clean alternative to the conventional fossil fuel based systems. Fuel cell systems have a high e?ciency and use easily available hydrocarbons like methane. Moreover, since the by-product is water, they have a very low environmental impact. The fuel cell system consists of several subsystems requiring a lot of e?ort from engineers in diverse areas. Fuel cell simulators can provide a convenient and economic alternative for testing the electrical subsystems such as converters and inverters. This thesis proposes a low-cost and an easy-to-use fuel cell simulator using a programmable DC supply along with a control module written in LabVIEW. This simulator reproduces the electrical characteristics of a 5kW solid oxide fuel cell (SOFC) stack under various operating conditions. The experimental results indicate that the proposed simulator closely matches the voltage-current characteristic of the SOFC system under varying load conditions. E?ects of non-electrical parameters like hydrogen ?ow rate are also modeled and these parameters are taken as dynamic inputs from the user. The simulator is customizable through a graphical user interface and allows the user to model other types of fuel cells with the respective voltage-current data. The simulator provides an inexpensive and accurate representation of a solid oxide fuel cell under steady state and transient conditions and can replace an actual fuel cell during testing of power conditioning equipment.

Acharya, Prabha Ramchandra

2004-08-01T23:59:59.000Z

380

Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell  

NLE Websites -- All DOE Office Websites (Extended Search)

Financial Opportunities Financial Opportunities Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell Market Transformation to someone by E-mail Share Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell Market Transformation on Facebook Tweet about Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell Market Transformation on Twitter Bookmark Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell Market Transformation on Google Bookmark Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell Market Transformation on Delicious Rank Fuel Cell Technologies Office: Recovery Act Projects Funded for Fuel Cell Market Transformation on Digg

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Optimization of Fuel Cell System Operating Conditions for Fuel Cell Vehicles  

E-Print Network (OSTI)

An Indirect Methanol Pem Fuel Cell System, SAE 2001, (paperof automotive PEM fuel cell stacks, SAE 2000 (paper numberParasitic Loads in Fuel Cell Vehicles, International Journal

Zhao, Hengbing; Burke, Andy

2008-01-01T23:59:59.000Z

382

Hybrid Fuel Cell Technology Overview  

SciTech Connect

For the purpose of this STI product and unless otherwise stated, hybrid fuel cell systems are power generation systems in which a high temperature fuel cell is combined with another power generating technology. The resulting system exhibits a synergism in which the combination performs with an efficiency far greater than can be provided by either system alone. Hybrid fuel cell designs under development include fuel cell with gas turbine, fuel cell with reciprocating (piston) engine, and designs that combine different fuel cell technologies. Hybrid systems have been extensively analyzed and studied over the past five years by the Department of Energy (DOE), industry, and others. These efforts have revealed that this combination is capable of providing remarkably high efficiencies. This attribute, combined with an inherent low level of pollutant emission, suggests that hybrid systems are likely to serve as the next generation of advanced power generation systems.

None available

2001-05-31T23:59:59.000Z

383

List of Fuel Cells using Renewable Fuels Incentives | Open Energy  

Open Energy Info (EERE)

Fuel Cells using Renewable Fuels Incentives Fuel Cells using Renewable Fuels Incentives Jump to: navigation, search The following contains the list of 192 Fuel Cells using Renewable Fuels Incentives. CSV (rows 1 - 192) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active Advanced Energy Fund (Ohio) Public Benefits Fund Ohio Commercial Industrial Institutional Residential Utility Biomass CHP/Cogeneration Fuel Cells Fuel Cells using Renewable Fuels Geothermal Electric Hydroelectric energy Landfill Gas Microturbines Municipal Solid Waste Photovoltaics Solar Space Heat Solar Thermal Electric Solar Water Heat Wind energy Yes AlabamaSAVES Revolving Loan Program (Alabama) State Loan Program Alabama Commercial Industrial Institutional Building Insulation Doors Energy Mgmt. Systems/Building Controls

384

Direct Methanol Fuel Cell for Portable Applications  

E-Print Network (OSTI)

A methanol fuel cell stack has at cl f is being incorporated a portable ions. 1 performance and flow rate for cell Water data, transport mechanisms fuel are discussed. Stack response has Implications slack performance and conditions addressed. Introduction 1 development a methanol fuel is presently pursued at 1 sponsorship from Research (1 A five methanol oxidizing stack has at stack incorporates liquiddirect methanol proton exchange membrane [1, 2], methanol (1 by oxidation an solution methanol at reduction at cathode. `1 focus results out stacks. form a n part of 1 cells have as storage but complicated systems to Upon of the methanol fuel many system simpler than before. In the can oxidized at thus is for fuel With the f mixture, electrolytes always at a of operation free-aqueous acid and thus corrosion issues addressed electrode assemblies consist main catalyzed cathode, and a polymer catalyst is the cathode catalyst is as a polymer `1 current state at the for is V at current d...

Narayanan Frank And; T. Valdez; S. R. Narayanan; H Frank; W. Chun

1997-01-01T23:59:59.000Z

385

Grafted polyelectrolyte membranes for lithium batteries and fuel cells  

DOE Green Energy (OSTI)

Polyelectrolyte materials have been developed for lithium battery systems in response to the severe problems due to salt concentration gradients that occur in composite electrodes (aka membrane-electrode assemblies). Comb branch polymer architectures are described which allow for grafting of appropriate anions on to the polymer and also for cross-linking to provide for appropriate mechanical properties. The interactions of the polymers with the electrode surfaces are critical for the performance of the system and some of the structural features that influence this will be described. Parallels with the fuel cell MEA structures exist and will also be discussed.

Kerr, John B.

2003-06-24T23:59:59.000Z

386

Application of Vacuum Deposition Methods to Solid Oxide Fuel Cells  

Science Conference Proceedings (OSTI)

The application of vacuum deposition techniques to the fabrication of solid oxide fuel cell materials and structures are reviewed, focusing on magnetron sputtering, vacuum plasma methods, laser ablation, and electrochemical vapor deposition. A description of each method and examples of use to produce electrolyte, electrode, and/or electrical interconnects are given. Generally high equipment costs and relatively low deposition rates have limited the use of vacuum deposition methods in solid oxide fuel cell manufacture, with a few notable exceptions. Vacuum methods are particularly promising in the fabrication of micro fuel cells, where thin films of high quality and unusual configuration are desired.

Pederson, Larry R.; Singh, Prabhakar; Zhou, Xiao Dong

2006-07-01T23:59:59.000Z

387

Fuel cell gas management system  

SciTech Connect

A fuel cell gas management system including a cathode humidification system for transferring latent and sensible heat from an exhaust stream to the cathode inlet stream of the fuel cell; an anode humidity retention system for maintaining the total enthalpy of the anode stream exiting the fuel cell equal to the total enthalpy of the anode inlet stream; and a cooling water management system having segregated deionized water and cooling water loops interconnected by means of a brazed plate heat exchanger.

DuBose, Ronald Arthur (Marietta, GA)

2000-01-11T23:59:59.000Z

388

Improved electrolytes for fuel cells  

DOE Green Energy (OSTI)

Present day fuel cells based upon hydrogen and oxygen have limited performance due to the use of phosphoric acid as an electrolyte. Improved performance is desirable in electrolyte conductivity, electrolyte management, oxygen solubility, and the kinetics of the reduction of oxygen. Attention has turned to fluorosulfonic acids as additives or substitute electrolytes to improve fuel cell performance. The purpose of this project is to synthesize and electrochemically evaluate new fluorosulfonic acids as superior alternatives to phosphoric acid in fuel cells. (VC)

Gard, G.L.; Roe, D.K.

1991-06-01T23:59:59.000Z

389

New Li-alloy electrode for Li-alloy/metal sulfide cells  

DOE Green Energy (OSTI)

The present invention relates to electrodes for use in secondary electrochemical cells. More particularly, it concerns a method of making a negative electrode composition, the electrode composition made thereby and the secondary electrochemical cell containing the electrode, wherein the negative electrode composition includes a lithium alloy including silicon and nickel.

Kaun, T.D.

1994-12-31T23:59:59.000Z

390

Molten carbonate fuel cell separator  

DOE Patents (OSTI)

In a stacked array of molten carbonate fuel cells, a fuel cell separator is positioned between adjacent fuel cells to provide isolation as well as a conductive path therebetween. The center portion of the fuel cell separator includes a generally rectangular, flat, electrical conductor. Around the periphery of the flat portion of the separator are positioned a plurality of elongated resilient flanges which form a gas-tight seal around the edges of the fuel cell. With one elongated flange resiliently engaging a respective edge of the center portion of the separator, the sealing flanges, which are preferably comprised of a noncorrosive material such as an alloy of yttrium, iron, aluminum or chromium, form a tight-fitting wet seal for confining the corrosive elements of the fuel cell therein. This arrangement permits a good conductive material which may be highly subject to corrosion and dissolution to be used in combination with a corrosion-resistant material in the fuel cell separator of a molten carbonate fuel cell for improved fuel cell conductivity and a gas-tight wet seal.

Nickols, Richard C. (East Hartford, CT)

1986-09-02T23:59:59.000Z

391

Molten carbonate fuel cell separator  

DOE Patents (OSTI)

In a stacked array of molten carbonate fuel cells, a fuel cell separator is positioned between adjacent fuel cells to provide isolation as well as a conductive path therebetween. The center portion of the fuel cell separator includes a generally rectangular, flat, electrical conductor. Around the periphery of the flat portion of the separator are positioned a plurality of elongated resilient flanges which form a gas-tight seal around the edges of the fuel cell. With one elongated flange resiliently engaging a respective edge of the center portion of the separator, the sealing flanges, which are preferably comprised of a noncorrosive material such as an alloy of yttrium, iron, aluminum or chromium, form a tight-fitting wet seal for confining the corrosive elements of the fuel cell therein. This arrangement permits a good conductive material which may be highly subject to corrosion and dissolution to be used in combination with a corrosion-resistant material in the fuel cell separator of a molten carbonate fuel cell for improved fuel cell conductivity and a gas-tight wet seal.

Nickols, R.C.

1984-10-17T23:59:59.000Z

392

LADWP FUEL CELL DEMONSTRATION PROJECT  

SciTech Connect

Los Angeles Department of Water and Power (LADWP) is currently one of the most active power utility companies in researching fuel cell technology. Fuel cells offer many benefits and are now used as an alternative to traditional internal combustion engines in power generation. In continuing it's role as the leader in fuel cell research, LADWP has installed a pre-commercial molten carbonate fuel cell on August 2001 at its headquarter, the John Ferraro Building (JFB). The goal of this project is to learn more about the actual behavior of the fuel cell running under real world conditions. The fuel cell ran smoothly through the first year of operation with very high efficiency, but with some minor setbacks. The JFB fuel cell project is funded by the City of Los Angeles Department of Water and Power with partial grant funding from the Department of Defense's Climate Change Fuel Cell Buydown Program. The technical evaluation and the benefit-cost evaluation of the JFB fuel cell are both examined in this report.

Thai Ta

2003-09-12T23:59:59.000Z

393

Fuel Cells | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

as high as 90% is achievable. This high efficiency operation saves money, saves energy, and reduces greenhouse gas emissions. Regenerative or Reversible Fuel Cells This...

394

CLIMATE CHANGE FUEL CELL PROGRAM  

DOE Green Energy (OSTI)

This report discusses the first year of operation of a fuel cell power plant located at the Sheraton Edison Hotel, Edison, New Jersey. PPL EnergyPlus, LLC installed the plant under a contract with the Starwood Hotels & Resorts Worldwide, Inc. A DFC{reg_sign}300 fuel cell, manufactured by FuelCell Energy, Inc. of Danbury, CT was selected for the project. The fuel cell successfully operated from June 2003 to May 2004. This report discusses the performance of the plant during this period.

Steven A. Gabrielle

2004-12-03T23:59:59.000Z

395

Fuel Cell Technologies Office: Education  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

& Offices | Consumer Information Education Search Search Help Education EERE Fuel Cell Technologies Office Education Printable Version Share this resource Send a link...

396

EERE Fuel Cell Technologies Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Results will be documented in a report by Pacific Northwest National Lab: "Pathways to Commercial Success: Technologies and Products Supported by the Hydrogen, Fuel Cells and...

397

LADWP FUEL CELL DEMONSTRATION PROJECT  

DOE Green Energy (OSTI)

Los Angeles Department of Water and Power (LADWP) is currently one of the most active power utility companies in researching fuel cell technology. Fuel cells offer many benefits and are now used as an alternative to traditional internal combustion engines in power generation. In continuing it's role as the leader in fuel cell research, LADWP has installed a pre-commercial molten carbonate fuel cell on August 2001 at its headquarter, the John Ferraro Building (JFB). The goal of this project is to learn more about the actual behavior of the fuel cell running under real world conditions. The fuel cell ran smoothly through the first year of operation with very high efficiency, but with some minor setbacks. The JFB fuel cell project is funded by the City of Los Angeles Department of Water and Power with partial grant funding from the Department of Defense's Climate Change Fuel Cell Buydown Program. The technical evaluation and the benefit-cost evaluation of the JFB fuel cell are both examined in this report.

Thai Ta

2003-09-12T23:59:59.000Z

398

Fuel Cell Technologies Office: Education  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Technologies Office - Education Students learn about solar energy. DOE supports demonstrations and commercialization by providing technically accurate and objective...

399

Method of forming a plasma sprayed interconnection layer on an electrode of an electrochemical cell  

DOE Patents (OSTI)

A dense, substantially gas-tight, electrically conductive interconnection layer is formed on an air electrode structure of an electrochemical cell by (A) providing an electrode surface; (B) forming on a selected portion of the electrode surface, a layer of doped LaCrO{sub 3} particles doped with an element selected from Ca, Sr, Ba, Mg, Co, Ni, Al and mixtures thereof by plasma spraying doped LaCrO{sub 3} powder, preferably compensated with chromium as Cr{sub 2}O{sub 3} and/or dopant element, preferably by plasma arc spraying; and, (C) heating the doped and compensated LaCrO{sub 3} layer to about 1100 C to 1300 C to provide a dense, substantially gas-tight, substantially hydration-free, electrically conductive interconnection material bonded to the electrode surface. A solid electrolyte layer can be applied to the unselected portion of the air electrode, and a fuel electrode can be applied to the solid electrolyte, to provide an electrochemical cell. 6 figs.

Spengler, C.J.; Folser, G.R.; Vora, S.D.; Kuo, L.; Richards, V.L.

1995-06-20T23:59:59.000Z

400

Method of forming a plasma sprayed interconnection layer on an electrode of an electrochemical cell  

DOE Patents (OSTI)

A dense, substantially gas-tight, electrically conductive interconnection layer is formed on an air electrode structure of an electrochemical cell by (A) providing an electrode surface; (B) forming on a selected portion of the electrode surface, a layer of doped LaCrO.sub.3 particles doped with an element selected from Ca, Sr, Ba, Mg, Co, Ni, Al and mixtures thereof by plasma spraying doped LaCrO.sub.3 powder, preferably compensated with chromium as Cr.sub.2 O.sub.3 and/or dopant element, preferably by plasma arc spraying; and, (C) heating the doped and compensated LaCrO.sub.3 layer to about 1100.degree. C. to 1300.degree. C. to provide a dense, substantially gas-tight, substantially hydration-free, electrically conductive interconnection material bonded to the electrode surface. A solid electrolyte layer can be applied to the unselected portion of the air electrode, and a fuel electrode can be applied to the solid electrolyte, to provide an electrochemical cell.

Spengler, Charles J. (Murrysville, PA); Folser, George R. (Lower Burrell, PA); Vora, Shailesh D. (Monroeville, PA); Kuo, Lewis (Monroeville, PA); Richards, Von L. (Anyola, IN)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

DEVELOPMENT OF NOVEL ELECTROCATALYSTS FOR PROTON EXCHANGE MEMBRANE FUEL CELLS  

DOE Green Energy (OSTI)

Fuel cells are electrochemical devices that convert the available chemical free energy directly into electrical energy, without going through heat exchange process. Of all different types of fuel cells, the Proton Exchange Membrane Fuel Cell (PEMFC) is one of the most promising power sources for stand-alone utility and electric vehicle applications. Platinum (Pt) Catalyst is used for both fuel and air electrodes in PEMFCs. However, carbon monoxide (CO) contamination of H{sub 2} greatly affects electro catalysts used at the anode of PEMFCs and decreases cell performance. The irreversible poisoning of the anode can occur even in CO concentrations as low as few parts per million (ppm). In this work, we have synthesized several novel elctrocatalysts (Pt/C, Pt/Ru/C, Pt/Mo/C, Pt/Ir and Pt/Ru/Mo) for PEMFCs. These catalysts have been tested for CO tolerance in the H{sub 2}/air fuel cell, using CO concentrations in the H{sub 2} fuel that varies from 10 to 100 ppm. The performance of the electrodes was evaluated by determining the cell potential against current density. The effects of catalyst composition and electrode film preparation method on the performance of PEM fuel cell were also studied. It was found that at 70 C and 3.5 atm pressure at the cathode, Pt-alloy catalyst (10 wt% Pt/Ru/C, 20 wt% Pt/Mo/C) were more CO tolerant than the 20 wt% Pt/C catalyst alone. It was also observed that spraying method was better than the brushing technique for the preparation of electrode film.

Shamsuddin Ilias

2003-04-24T23:59:59.000Z

402

Fuel Cell Power PlantsFuel Cell Power Plants Renewable and Waste Fuels  

E-Print Network (OSTI)

for Safety and Grid Interface Direct Fuel Cell Module: FuelCell Energy, the FuelCell Energy logo, Direct Fuel generation of combined heat andcombined heat and power ­Clean Power with natural gas f lfuel ­Renewable Power with biofuels ·Grid connected power generationgeneration ­High Efficiency Grid support

403

Fuel Cells for Portable Power: 1. Introduction to DMFCs; 2. Advanced Materials and Concepts for Portable Power Fuel Cells  

DOE Green Energy (OSTI)

Thanks to generally less stringent cost constraints, portable power fuel cells, the direct methanol fuel cell (DMFC) in particular, promise earlier market penetration than higher power polymer electrolyte fuel cells (PEFCs) for the automotive and stationary applications. However, a large-scale commercialization of DMFC-based power systems beyond niche applications already targeted by developers will depend on improvements to fuel cell performance and performance durability as well as on the reduction in cost, especially of the portable systems on the higher end of the power spectrum (100-250 W). In this part of the webinar, we will focus on the development of advanced materials (catalysts, membranes, electrode structures, and membrane electrode assemblies) and fuel cell operating concepts capable of fulfilling two key targets for portable power systems: the system cost of $5/W and overall fuel conversion efficiency of 2.0-2.5 kWh/L. Presented research will concentrate on the development of new methanol oxidation catalysts, hydrocarbon membranes with reduced methanol crossover, and improvements to component durability. Time permitted, we will also present a few highlights from the development of electrocatalysts for the oxidation of two alternative fuels for the direct-feed fuel cells: ethanol and dimethyl ether.

Zelenay, Piotr [Los Alamos National Laboratory

2012-07-16T23:59:59.000Z

404

Precious Metal Recovery from Fuel Cell MEA's  

DOE Green Energy (OSTI)

In 2003, Engelhard Corporation received a DOE award to develop a cost-effective, environmentally friendly approach to recover Pt from fuel cell membrane electrode assemblies (MEAs). The most important precious metal used in fuel cells is platinum, but ruthenium is also added to the anode electrocatalyst if CO is present in the hydrogen stream. As part of the project, a large number of measurements of Pt and Ru need to be made. A low-cost approach to measuring Pt is using the industry standard spectrophotometric measurement of Pt complexed with stannous chloride. The interference of Ru can be eliminated by reading the Pt absorbance at 450 nm. Spectrophotometric methods for measuring Ru, while reported in the literature, are not as robust. This paper will discuss the options for measuring Pt and Ru using the method of UV-VIS spectrophotometry

Lawrence Shore

2004-04-25T23:59:59.000Z

405

Fuel Cell Technologies Office: News  

NLE Websites -- All DOE Office Websites (Extended Search)

News News Recent news stories and press releases related to the Fuel Cell Technologies Office are presented below. To see past news items, refer to the news archives for 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, and 2003. Subscribe to Fuel Cell Technologies Office updates. January 10, 2014 Upcoming Live Discussion on Energy 101: Fuel Cells Join the Energy Department at 2:00 p.m. ET on Thursday, January 16 for the first Energy 101 Google+ Hangout, which will focus on fuel cells. More January 10, 2014 Help Design the Hydrogen Fueling Station of Tomorrow The Energy Department posted a blog yesterday about the Hydrogen Education Foundation's Hydrogen Student Design Contest. More December 20, 2013 Your Holidays...Brought to You by Fuel Cells

406

Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels  

NLE Websites -- All DOE Office Websites (Extended Search)

Compressed Natural Gas Compressed Natural Gas and Hydrogen Fuels Workshop to someone by E-mail Share Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Facebook Tweet about Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Twitter Bookmark Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Google Bookmark Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Delicious Rank Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Digg Find More places to share Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications

407

Advanced materials for solid oxide fuel cells  

DOE Green Energy (OSTI)

The purpose of this research is to improve the properties of the current state-of-the-art materials used for solid oxide fuel cells (SOFCs). The objectives are to: (1) develop materials based on modifications of the state-of-the-art materials; (2) minimize or eliminate stability problems in the cathode, anode, and interconnect; (3) Electrochemically evaluate (in reproducible and controlled laboratory tests) the current state-of-the-art air electrode materials and cathode/electrolyte interfacial properties; (4) Develop accelerated electrochemical test methods to evaluate the performance of SOFCs under controlled and reproducible conditions; and (5) Develop and test materials for use in low-temperature SOFCs.

Armstrong, T.; Stevenson, J.

1995-12-31T23:59:59.000Z

408

Porous electrolyte retainer for molten carbonate fuel cell. [lithium aluminate  

DOE Patents (OSTI)

A porous tile for retaining molten electrolyte within a fuel cell is prepared by sintering particles of lithium aluminate into a stable structure. The tile is assembled between two porous metal plates which serve as electrodes with fuels gases such as H/sub 2/ and CO opposite to oxidant gases such as O/sub 2/ and CO/sub 2/. The tile is prepared with a porosity of 55 to 65% and a pore size distribution selected to permit release of sufficient molten electrolyte to wet but not to flood the adjacent electrodes.

Singh, R.N.; Dusek, J.T.

1979-12-27T23:59:59.000Z

409

Fuel Cell Vehicles | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fuel Cell Vehicles Fuel Cell Vehicles August 20, 2013 - 9:11am Addthis Photo of a blue car with 'The Road to Hydrogen' written on it, filling up at a hydrogen fueling station. Fuel...

410

Solid-polymer-electrolyte fuel cells  

DOE Green Energy (OSTI)

A transport model for polymer electrolytes is presented, based on concentrated solution theory and irreversible thermodynamics. Thermodynamic driving forces are developed, transport properties are identified and experiments devised. Transport number of water in Nafion 117 membrane is determined using a concentration cell. It is 1.4 for a membrane equilibrated with saturated water vapor at 25{degrees}C, decreases slowly as the membrane is dehydrated, and falls sharply toward zero as the water content approaches zero. The relation between transference number, transport number, and electroosmotic drag coefficient is presented, and their relevance to water-management is discussed. A mathematical model of transport in a solid-polymer-electrolyte fuel cell is presented. A two-dimensional membrane-electrode assembly is considered. Water management, thermal management, and utilization of fuel are examined in detail. The membrane separators of these fuel cells require sorbed water to maintain conductivity; therefore it is necessary to manage the water content in membranes to ensure efficient operation. Water and thermal management are interrelated. Rate of heat removal is shown to be a critical parameter in the operation of these fuel cells. Current-voltage curves are presented for operation on air and reformed methanol. Equations for convective diffusion to a rotating disk are solved numerically for a consolute point between the bulk concentration and the surface. A singular-perturbation expansion is presented for the condition where the bulk concentration is nearly equal to the consolute-point composition. Results are compared to Levich's solution and analysis.

Fuller, T.F.

1992-07-01T23:59:59.000Z

411

Hybrid deposition of thin film solid oxide fuel cells and electrolyzers  

DOE Patents (OSTI)

The use of vapor deposition techniques enables synthesis of the basic components of a solid oxide fuel cell (SOFC); namely, the electrolyte layer, the two electrodes, and the electrolyte-electrode interfaces. Such vapor deposition techniques provide solutions to each of the three critical steps of material synthesis to produce a thin film solid oxide fuel cell (TFSOFC). The electrolyte is formed by reactive deposition of essentially any ion conducting oxide, such as defect free, yttria stabilized zirconia (YSZ) by planar magnetron sputtering. The electrodes are formed from ceramic powders sputter coated with an appropriate metal and sintered to a porous compact. The electrolyte-electrode interface is formed by chemical vapor deposition of zirconia compounds onto the porous electrodes to provide a dense, smooth surface on which to continue the growth of the defect-free electrolyte, whereby a single fuel cell or multiple cells may be fabricated. 8 figs.

Jankowski, A.F.; Makowiecki, D.M.; Rambach, G.D.; Randich, E.

1998-05-19T23:59:59.000Z

412

Hybrid deposition of thin film solid oxide fuel cells and electrolyzers  

DOE Patents (OSTI)

The use of vapor deposition techniques enables synthesis of the basic components of a solid oxide fuel cell (SOFC); namely, the electrolyte layer, the two electrodes, and the electrolyte-electrode interfaces. Such vapor deposition techniques provide solutions to each of the three critical steps of material synthesis to produce a thin film solid oxide fuel cell (TFSOFC). The electrolyte is formed by reactive deposition of essentially any ion conducting oxide, such as defect free, yttria stabilized zirconia (YSZ) by planar magnetron sputtering. The electrodes are formed from ceramic powders sputter coated with an appropriate metal and sintered to a porous compact. The electrolyte-electrode interface is formed by chemical vapor deposition of zirconia compounds onto the porous electrodes to provide a dense, smooth surface on which to continue the growth of the defect-free electrolyte, whereby a single fuel cell or multiple cells may be fabricated.

Jankowski, Alan F. (Livermore, CA); Makowiecki, Daniel M. (Livermore, CA); Rambach, Glenn D. (Livermore, CA); Randich, Erik (Endinboro, PA)

1999-01-01T23:59:59.000Z

413

Hybrid deposition of thin film solid oxide fuel cells and electrolyzers  

DOE Patents (OSTI)

The use of vapor deposition techniques enables synthesis of the basic components of a solid oxide fuel cell (SOFC); namely, the electrolyte layer, the two electrodes, and the electrolyte-electrode interfaces. Such vapor deposition techniques provide solutions to each of the three critical steps of material synthesis to produce a thin film solid oxide fuel cell (TFSOFC). The electrolyte is formed by reactive deposition of essentially any ion conducting oxide, such as defect free, yttria stabilized zirconia (YSZ) by planar magnetron sputtering. The electrodes are formed from ceramic powders sputter coated with an appropriate metal and sintered to a porous compact. The electrolyte-electrode interface is formed by chemical vapor deposition of zirconia compounds onto the porous electrodes to provide a dense, smooth surface on which to continue the growth of the defect-free electrolyte, whereby a single fuel cell or multiple cells may be fabricated.

Jankowski, Alan F. (Livermore, CA); Makowiecki, Daniel M. (Livermore, CA); Rambach, Glenn D. (Livermore, CA); Randich, Erik (Endinboro, PA)

1998-01-01T23:59:59.000Z

414

Internal natural gas reformer-dividers for a solid oxide fuel cell generator configuration  

Science Conference Proceedings (OSTI)

This patent describes a fuel cell generator configuration. It comprises electrically connected, axially elongated, fuel cells, each cell having an outer and inner electrode with solid oxide electrolyte therebetween; where elongated dividers separate and are positioned between fuel cells, and where at least one of the elongated dividers is hollow, the hollow divider having solid elongated walls, a reformable fuel mixture entrance, and an exit allowing passage of reformed fuel to the fuel cells, and where the cross-section of the divider contains a catalytic reforming material.

Reichner, P.

1992-01-21T23:59:59.000Z

415

Fuel Cell Technologies Program Record 12012: Fuel Cell Bus Targets  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Technologies Program Record Fuel Cell Technologies Program Record Record #: 12012 Date: March 2, 2012 Title: Fuel Cell Bus Targets Originator: Jacob Spendelow and Dimitrios Papageorgopoulos Approved by: Sunita Satyapal * Date: September 12, 2012 Item: Performance, cost, and durability targets for fuel cell transit buses are presented in Table 1. These market-driven targets represent technical requirements needed to compete with alternative technologies. They do not represent expectations for the status of the technology in future years. Table 1. Performance, cost, and durability targets for fuel cell transit buses. Units 2012 Status 2016 Target Ultimate Target Bus Lifetime years/miles 5/100,000 1 12/500,000 12/500,000 Power Plant Lifetime 2,3 hours 12,000 18,000 25,000

416

Hydrogen and Fuel Cells R&D  

NLE Websites -- All DOE Office Websites (Extended Search)

Liquids --Hydrogen Storage Materials --Hydrogen Storage Systems Modeling and Analysis --Thermochemical Hydrogen * Fuel Cells --Polymer Electrolyte --Modeling & Analysis --Fuel...

417

Fuel Cell Technologies Office: Waste-to-Energy using Fuel Cells...  

NLE Websites -- All DOE Office Websites (Extended Search)

Waste-to-Energy using Fuel Cells Workshop to someone by E-mail Share Fuel Cell Technologies Office: Waste-to-Energy using Fuel Cells Workshop on Facebook Tweet about Fuel Cell...

418

Fuel Cell Technologies Office: Waste-to-Energy using Fuel Cells...  

NLE Websites -- All DOE Office Websites (Extended Search)

Waste-to-Energy using Fuel Cells Webinar to someone by E-mail Share Fuel Cell Technologies Office: Waste-to-Energy using Fuel Cells Webinar on Facebook Tweet about Fuel Cell...

419

Intermediate Temperature Solid Oxide Fuel Cell Development  

DOE Green Energy (OSTI)

Solid oxide fuel cells (SOFCs) are high efficiency energy conversion devices. Present materials set, using yttria stabilized zirconia (YSZ) electrolyte, limit the cell operating temperatures to 800 C or higher. It has become increasingly evident however that lowering the operating temperature would provide a more expeditious route to commercialization. The advantages of intermediate temperature (600 to 800 C) operation are related to both economic and materials issues. Lower operating temperature allows the use of low cost materials for the balance of plant and limits degradation arising from materials interactions. When the SOFC operating temperature is in the range of 600 to 700 C, it is also possible to partially reform hydrocarbon fuels within the stack providing additional system cost savings by reducing the air preheat heat-exchanger and blower size. The promise of Sr and Mg doped lanthanum gallate (LSGM) electrolyte materials, based on their high ionic conductivity and oxygen transference number at the intermediate temperature is well recognized. The focus of the present project was two-fold: (a) Identify a cell fabrication technique to achieve the benefits of lanthanum gallate material, and (b) Investigate alternative cathode materials that demonstrate low cathode polarization losses at the intermediate temperature. A porous matrix supported, thin film cell configuration was fabricated. The electrode material precursor was infiltrated into the porous matrix and the counter electrode was screen printed. Both anode and cathode infiltration produced high performance cells. Comparison of the two approaches showed that an infiltrated cathode cells may have advantages in high fuel utilization operations. Two new cathode materials were evaluated. Northwestern University investigated LSGM-ceria composite cathode while Caltech evaluated Ba-Sr-Co-Fe (BSCF) based pervoskite cathode. Both cathode materials showed lower polarization losses at temperatures as low as 600 C than conventional manganite or cobaltite cathodes.

S. Elangovan; Scott Barnett; Sossina Haile

2008-06-30T23:59:59.000Z

420

Fuel cell separator with compressible sealing flanges  

DOE Patents (OSTI)

A separator for separating adjacent fuel cells in a stack of such cells includes a flat, rectangular, gas-impermeable plate disposed between adjacent cells and having two opposite side margins thereof folded back over one side of the plate to form two first seal flanges and having the other side margins thereof folded back over the opposite side of the plate to form two second seal flanges, each of the seal flanges cooperating with the plate to define a channel in which is disposed a resiliently compressible stack of thin metal sheets. The two first seal flanges cooperate with the electrolyte matrix of one of the cells to form a gas-impermeable seal between an electrode of the one cell and one of two reactant gas manifolds. The second seal flanges cooperate with the electrolyte matrix of the other cell for forming a gas-impermeable seal between an electrode of the other cell and the other of the two reactant gas manifolds. The seal flanges cooperate with the associated compressible stacks of sheets for maintaining a spacing between the plate and the electrolyte matrices while accommodating variation of that spacing.

Mientek, A.P.

1984-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Proton Exchange Membranes for Fuel Cells  

Science Conference Proceedings (OSTI)

Proton exchange membrane, also known as polymer electrolyte membrane, fuel cells (PEMFCs) offer the promise of efficient conversion of chemical energy of fuel, such as hydrogen or methanol, into electricity with minimal pollution. Their widespread use to power zero-emission automobiles as part of a hydrogen economy can contribute to enhanced energy security and reduction in greenhouse gas emissions. However, the commercial viability of PEMFC technology is hindered by high cost associated with the membrane electrode assembly (MEA) and poor membrane durability under prolonged operation at elevated temperature. Membranes for automotive fuel cell applications need to perform well over a period comparable to the life of an automotive engine and under heavy load cycling including start-stop cycling under sub-freezing conditions. The combination of elevated temperature, changes in humidity levels, physical stresses and harsh chemical environment contribute to membrane degradation. Perfluorinated sulfonic acid (PFSA)-based membranes, such as Nafion, have been the mainstay of PEMFC technology. Their limitations, in terms of cost and poor conductivity at low hydration, have led to continuing research into membranes that have good proton conductivity at elevated temperatures above 120 C and under low humidity conditions. Such membranes have the potential to avoid catalyst poisoning, simplify fuel cell design and reduce the cost of fuel cells. Hydrocarbon-based membranes are being developed as alternatives to PFSA membranes, but concerns about chemical and mechanical stability and durability remain. Novel anhydrous membranes based on polymer gels infused with protic ionic liquids have also been recently proposed, but considerable fundamental research is needed to understand proton transport in novel membranes and evaluate durability under fuel cell operating conditions. In order to advance this promising technology, it is essential to rationally design the next generation of PEMs based on an understanding of chemistry, membrane morphology and proton transport obtained from experiment, theory and computer simulation.

Devanathan, Ramaswami

2010-11-01T23:59:59.000Z

422

Manufacturing Fuel Cell Manhattan Project  

NLE Websites -- All DOE Office Websites (Extended Search)

to to DOE Fuel Cell Manufacturing Workshop 2011 John Christensen, PE NREL Consultant DOE Fuel Cell Market Transformation Support August 11, 2011 Manufacturing Fuel Cell Manhattan Project √ Identify manufacturing cost drivers to achieve affordability √ Identify best practices in fuel cell manufacturing technology √ Identify manufacturing technology gaps √ Identify FC projects to address these gaps MFCMP Objectives Completed Final Report due out Nov 2010 B2PCOE Montana Tech SME's Industry Academia Government FC Consortiums Power ranges * <0.5 kW (man portable / man wearable) * 0.5 kW< Power range < 10 kW (mobile power) Fuels: Hydrogen and reformed hydrocarbons *Packaged Fuels < 0.5 kW * Near term solution * Move through the supply chain like batteries

423

Fuel cell electric power production  

DOE Patents (OSTI)

A process for generating electricity from a fuel cell includes generating a hydrogen-rich gas as the fuel for the fuel cell by treating a hydrocarbon feed, which may be a normally liquid feed, in an autothermal reformer utilizing a first monolithic catalyst zone having palladium and platinum catalytic components therein and a second, platinum group metal steam reforming catalyst. Air is used as the oxidant in the hydrocarbon reforming zone and a low oxygen to carbon ratio is maintained to control the amount of dilution of the hydrogen-rich gas with nitrogen of the air without sustaining an insupportable amount of carbon deposition on the catalyst. Anode vent gas may be utilized as the fuel to preheat the inlet stream to the reformer. The fuel cell and the reformer are preferably operated at elevated pressures, up to about a pressure of 150 psia for the fuel cell.

Hwang, Herng-Shinn (Livingston, NJ); Heck, Ronald M. (Frenchtown, NJ); Yarrington, Robert M. (Westfield, NJ)

1985-01-01T23:59:59.000Z

424

Solid oxide fuel cell generator  

DOE Patents (OSTI)

A solid oxide fuel cell generator has a pair of spaced apart tubesheets in a housing. At least two intermediate barrier walls are between the tubesheets and define a generator chamber between two intermediate buffer chambers. An array of fuel cells have tubes with open ends engaging the tubesheets. Tubular, axially elongated electrochemical cells are supported on the tubes in the generator chamber. Fuel gas and oxidant gas are preheated in the intermediate chambers by the gases flowing on the other side of the tubes. Gas leakage around the tubes through the tubesheets is permitted. The buffer chambers reentrain the leaked fuel gas for reintroduction to the generator chamber.

Draper, Robert (Churchill Boro, PA); George, Raymond A. (Pittsburgh, PA); Shockling, Larry A. (Plum Borough, PA)

1993-01-01T23:59:59.000Z

425

1 | Fuel Cell Technologies Office eere.energy.gov DOE Fuel Cell Technologies Office  

E-Print Network (OSTI)

to demonstrate: World's first tri-generation station World's first fuel cell forklifts World's first fuel cell

426

Bronx Zoo Fuel Cell Project  

DOE Green Energy (OSTI)

A 200 kW Fuel Cell has been installed in the Lion House, Bronx Zoo, NY. The Fuel Cell is a 200 kW phosphoric acid type manufactured by United Technologies Corporation (UTC) and will provide thermal energy at 725,000 Btu/hr.

Hoang Pham

2007-09-30T23:59:59.000Z

427

Heated transportable fuel cell cartridges  

DOE Patents (OSTI)

A fuel cell stack protective system is made where a plurality of fuel cells, each containing liquid electrolyte subject to crystallization, is enclosed by a containing vessel, and where at least one electric heater is placed in the containing vessel and is capable of preventing electrolyte crystallization.

Lance, Joseph R. (N. Huntingdon, PA); Spurrier, Francis R. (Whitehall, PA)

1985-01-01T23:59:59.000Z

428

Fuel Cells for Robots  

NLE Websites -- All DOE Office Websites (Extended Search)

For Robots For Robots Fuel Cells For Robots Pavlo Rudakevych iRobot Pavlo Rudakevych iRobot Product Needs Product Needs * Military/Police/Search and Rescue - PackBot - Gladiator - ThrowBot/UGCV * Industrial and Oil - CoWorker - MicroRig * Military/Police/Search and Rescue - PackBot - Gladiator - ThrowBot/UGCV * Industrial and Oil - CoWorker - MicroRig PackBot PackBot * Mission capable robots * Rugged, portable tools for minimal casualty engagements * Assisting behaviors * Small size and weight * Mission capable robots * Rugged, portable tools for minimal casualty engagements * Assisting behaviors * Small size and weight System Concept System Concept System Concept System Concept System Concept Continued System Concept Continued * Modular payload bays - 3 primary - 1 head - 4 side pods * Each payload socket supports - Ethernet

429

Hydrogen & Fuel Cells - Fuel Cell - Polymer Electrolyte  

NLE Websites -- All DOE Office Websites (Extended Search)

Polymer Electrolyte Fuel Cell Research Polymer Electrolyte Fuel Cell Research Xiaoping Wang measures the stability of a platinum cathode electrocatalyst. Xiaoping Wang measures the stability of a platinum cathode electrocatalyst. One of the main barriers to the commercialization of polymer electrolyte fuel cell (PEFC) systems, especially for automotive use, is the high cost of the platinum electrocatalysts. Aside from the cost of the precious metal, concern has also been raised over the adequacy of the world supply of platinum, if fuel cell vehicles were to make a significant penetration into the global automotive fleet. At Argonne, chemists are working toward the development of low-cost nonplatinum electrocatalysts for the oxygen reduction reaction--durable materials that would be stable in the fuel

430

All ceramic structure for molten carbonate fuel cell  

DOE Patents (OSTI)

An all-ceramic molten carbonate fuel cell having a composition formed of a multivalent metal oxide or oxygenate such as an alkali metal, transition metal oxygenate. The structure includes an anode and cathode separated by an electronically conductive interconnect. The electrodes and interconnect are compositions ceramic materials. Various combinations of ceramic compositions for the anode, cathode and interconnect are disclosed. The fuel cell exhibits stability in the fuel gas and oxidizing environments. It presents reduced sealing and expansion problems in fabrication and has improved long-term corrosion resistance.

Smith, J.L.; Kucera, E.H.

1991-01-01T23:59:59.000Z

431

Method of bonding a conductive layer on an electrode of an electrochemical cell  

DOE Patents (OSTI)

A dense, electronically conductive interconnection layer 26 is bonded onto a porous, tubular, electronically conductive air electrode structure 16, optionally supported by a ceramic support 22, by (A) providing an air electrode surface, (B) forming on a selected portion of the electrode surface 24, without the use of pressure, particles of LaCrO.sub.3 doped with an element selected from the group consisting of Sr, Mg, Ca, Ba, Co, and mixtures thereof, where the particles have a deposit on their surface comprising calcium oxide and chromium oxide; (C) heating the particles with the oxide surface deposit in an oxidizing atmosphere at from 1,300.degree. C. to 1,550.degree. C., without the application of pressure, to provide a dense, sintered, interconnection material 26 bonded to the air electrode 16, where calcium and chromium from the surface deposit are incorporated into the structure of the LaCrO.sub.3. A solid electrolyte layer 18 can be applied to the uncovered portion of the air electrode, and a fuel electrode 20 can be applied to the solid electrolyte, to provide an electrochemical cell 10.

Bowker, Jeffrey C. (Richland Township, Allegheny County, PA); Singh, Prabhakar (Pittsburgh, PA)

1989-01-01T23:59:59.000Z

432

DOE Hydrogen and Fuel Cells Program: 2012 Annual Progress Report -  

NLE Websites -- All DOE Office Websites (Extended Search)

Manufacturing R&D Manufacturing R&D Printable Version 2012 Annual Progress Report VI. Manufacturing R&D This section of the 2012 Annual Progress Report for the DOE Hydrogen and Fuel Cells Program focuses on manufacturing R&D. Manufacturing R&D Sub-Program Overview, Nancy Garland, U.S. Department of Energy Fuel Cell Membrane Electrode Assembly Manufacturing R&D, Michael Ulsh, National Renewable Energy Laboratory Manufacturing of Low-Cost, Durable Membrane Electrode Assemblies Engineered for Rapid Conditioning, Colin Busby, W. L. Gore & Associates, Inc. Adaptive Process Controls and Ultrasonics for High-Temperature PEM MEA Manufacture, Dan Walczyk, Rensselaer Polytechnic Institute Non-Contact Sensor Evaluation for Bipolar Plate Manufacturing Process Control and Smart Assembly of Fuel Cell Stacks, Eric Stanfield,

433

Advanced Materials and Concepts for Portable Power Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 1 DOE Kick-off Meeting, Washington, DC September 28, 2010 Fuel Cell Projects Kick-off Meeting Washington, DC - September 28, 2010 Advanced Materials and Concepts for Portable Power Fuel Cells for Portable Power Fuel Cells Piotr Zelenay Los Alamos National Laboratory Los Alamos National Laboratory Los Alamos, New Mexico 87545 This presentation does not contain any proprietary, confidential, or otherwise restricted information - t t Overview Timeline * Start date: September 2010 * End date: Four-year duration Budget Budget * Total funding estimate: - DOE share: $3,825K Contractor share: $342K $342K - Contractor share: * FY10 funding received: $250K * FY11 funding estimate: $1,000K Barriers * A. Durability (catalyst; electrode) (catalyst; electrode)

434

Climate Change Fuel Cell Program  

DOE Green Energy (OSTI)

A 200 kW, natural gas fired fuel cell was installed at the Richard Stockton College of New Jersey. The purpose of this project was to demonstrate the financial and operational suitability of retrofit fuel cell technology at a medium sized college. Target audience was design professionals and the wider community, with emphasis on use in higher education. ''Waste'' heat from the fuel cell was utilized to supplement boiler operations and provide domestic hot water. Instrumentation was installed in order to measure the effectiveness of heat utilization. It was determined that 26% of the available heat was captured during the first year of operation. The economics of the fuel cell is highly dependent on the prices of electricity and natural gas. Considering only fuel consumed and energy produced (adjusted for boiler efficiency), the fuel cell saved $54,000 in its first year of operation. However, taking into account the price of maintenance and the cost of financing over the short five-year life span, the fuel cell operated at a loss, despite generous subsidies. As an educational tool and market stimulus, the fuel cell attracted considerable attention, both from design professionals and the general public.

Alice M. Gitchell

2006-09-15T23:59:59.000Z

435

Evaluation of Stationary Fuel Cell Deployments, Costs, and Fuels (Presentation)  

SciTech Connect

This presentation summarizes NREL's technology validation of stationary fuel cell systems and presents data on number of deployments, system costs, and fuel types.

Ainscough, C.; Kurtz, J.; Peters, M.; Saur, G.

2013-10-01T23:59:59.000Z

436

Fuel Cells using Renewable Fuels | Open Energy Information  

Open Energy Info (EERE)

Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Fuel Cells using Renewable Fuels Jump to: navigation, search TODO: Add description List of...

437

Fuel Cell Technologies Office: International Partnership for...  

NLE Websites -- All DOE Office Websites (Extended Search)

Partnership for Hydrogen and Fuel Cells in the Economy to someone by E-mail Share Fuel Cell Technologies Office: International Partnership for Hydrogen and Fuel Cells in the...

438

NETL: Fuel Cells/SECA News - Archive  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cells/Solid State Energy Conversion Alliance (SECA) Fuel Cells/Solid State Energy Conversion Alliance (SECA) News Archive SECA Workshop Proceedings, Peer Reviews, and Annual Reports 2013 Archive 2012 Archive 2011 Archive Previous Highlights FuelCell Energy's Stack Boosts Power and Minimizes Degradation FuelCell Energy has developed a new solid oxide fuel cell stack design that boosts the overall power output of the fuel cell stack by nearly 50%. FuelCell Energy also achieved a voltage degradation rate of 1.3% per 1000 hours after testing the fuel cells for 26,000 hours of operation. This breakthrough by FuelCell Energy of greater power from the fuel cell stack while minimizing fuel cell degradation pushes it further towards meeting SECA's goal of a market ready, affordable solid oxide fuel cell ready by the year 2010. (5/05)

439

Fuel Cell Today | Open Energy Information  

Open Energy Info (EERE)

Today Jump to: navigation, search Name Fuel Cell Today Place London, United Kingdom Zip EC1N 8EE Product Fuel Cell Today is a online information service for the global fuel cell...

440

Fuel Cell Technologies Office: NewsDetail  

NLE Websites -- All DOE Office Websites (Extended Search)

Office: NewsDetail on Twitter Bookmark Fuel Cell Technologies Office: NewsDetail on Google Bookmark Fuel Cell Technologies Office: NewsDetail on Delicious Rank Fuel Cell...

Note: This page contains sample records for the topic "fuel cells electrodes" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network (OSTI)

LemonsR. A. ( 1990) Fuel Cells for Transportation. Jour- DC,M. A. (1992). Hydrogen Fuel-Cell Vehicles. Re- koebensteinsolid tember. oxide fuel cell development. Journal of

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

442

Characterization of Fuel-Cell Diffusion Media  

E-Print Network (OSTI)

electrolyte membrane fuel cells, 2009. C. Lim and C. Y.directly into full fuel-cell simulations to predictFCgen1020ACS, www.ballard.com/fuel-cell-products, Accessed

Gunterman, Haluna Penelope Frances

2011-01-01T23:59:59.000Z

443

Fuel Cell Markets Ltd | Open Energy Information  

Open Energy Info (EERE)

Fuel Cell Markets Ltd Place Buckinghamshire, United Kingdom Zip SL0 9AQ Sector Hydro, Hydrogen Product Fuel Cell Markets was set up to assist companies in the fuel cell and...

444

Hydrocarbon Reformers for Fuel Cell Systems  

Science Conference Proceedings (OSTI)

Several new or emerging technologies are vying to compete in the distributed resources market; notably, fuel cells and microturbines. Fuel cells represent an idealized power generation technology with tremendous long-term promise. As a hydrogen-fueled system, however, fuel cells need either a hydrogen fuel supply infrastructure or fuel processing (reforming and clean-up) technology to convert conventional fossil fuels to a hydrogen-rich energy source. This report provides an overview of fuel processing t...

2000-11-30T23:59:59.000Z

445

MODELING AND DESIGN FOR A DIRECT CARBON FUEL CELL WITH ENTRAINED FUEL AND OXIDIZER  

DOE Green Energy (OSTI)

The novel molten carbonate fuel cell design described in this report uses porous bed electrodes. Molten carbonate, with carbon fuel particles and oxidizer entrained, is circulated through the electrodes. Carbon may be reacted directly, without gasification, in a molten carbonate fuel cell. The cathode reaction is 2CO{sub 2} + O{sub 2} 4e{sup -} {yields} 2CO{sub 3}{sup =}, while the anode reaction can be either C + 2CO{sub 3}{sup =} {yields} 3CO{sub 2} + 4e{sup -} or 2C + CO{sub 3}{sup =} {yields} 3CO + 2e{sup -}. The direct carbon fuel cell has an advantage over fuel cells using coal-derived synthesis gas in that it provides better overall efficiency and reduces equipment requirements. Also, the liquid electrolyte provides a means for transporting the solid carbon. The porous bed cell makes use of this carbon transport ability of the molten salt electrolyte. A one-dimensional model has been developed for predicting the performance of this cell. For the cathode, dependent variables are superficial O{sub 2} and CO{sub 2} fluxes in the gas phase, superficial O{sub 2} and CO{sub 2} fluxes in the liquid phase, superficial current density through the electrolyte, and electrolyte potential. The variables are related by correlations, from the literature, for gas-liquid mass transfer, liquid-solid mass transfer, cathode current density, electrode overpotential, and resistivity of a liquid with entrained gas. For the anode, dependent variables are superficial CO{sub 2} flux in the gas phase, superficial CO{sub 2} flux in the liquid phase, superficial C flux, superficial current density through the electrolyte, and electrolyte potential. The same types of correlations relate the variables as in the cathode, with the addition of a correlation for resistivity of a fluidized bed. CO production is not considered, and axial dispersion is neglected. The model shows behavior typical of porous bed electrodes used in electrochemical processes. Efficiency is comparable to that of membrane electrode fuel cells. Effective bed depths are on the order of 1-5 centimeter, giving power/volume lower than for membrane electrode cells. The porous bed design, however, uses less expensive materials and is more resistant to fouling by coal impurities. The model will be used in the second phase of the project to design a laboratory-scale prototype cell. The prototype cell will demonstrate the concept and provide experimental data for improving the model.

Alan A. Kornhauser; Ritesh Agarwal

2005-04-01T23:59:59.000Z

446

Low cost stable air electrode material for high temperature solid oxide electrolyte electrochemical cells  

DOE Patents (OSTI)

A low cost, lanthanide-substituted, dimensionally and thermally stable, gas permeable, electrically conductive, porous ceramic air electrode composition of lanthanide-substituted doped lanthanum manganite is provided which is used as the cathode in high temperature, solid oxide electrolyte fuel cells and generators. The air electrode composition of this invention has a much lower fabrication cost as a result of using a lower cost lanthanide mixture, either a natural mixture or an unfinished lanthanide concentrate obtained from a natural mixture subjected to incomplete purification, as the raw material in place of part or all of the higher cost individual lanthanum. The mixed lanthanide primarily contains a mixture of at least La, Ce, Pr, and Nd, or at least La, Ce, Pr, Nd and Sm in its lanthanide content, but can also include minor amounts of other lanthanides and trace impurities. The use of lanthanides in place of some or all of the lanthanum also increases the dimensional stability of the air electrode. This low cost air electrode can be fabricated as a cathode for use in high temperature, solid oxide fuel cells and generators. 4 figs.

Kuo, L.J.H.; Singh, P.; Ruka, R.J.; Vasilow, T.R.; Bratton, R.J.

1997-11-11T23:59:59.000Z

447

Low cost stable air electrode material for high temperature solid oxide electrolyte electrochemical cells  

DOE Patents (OSTI)

A low cost, lanthanide-substituted, dimensionally and thermally stable, gas permeable, electrically conductive, porous ceramic air electrode composition of lanthanide-substituted doped lanthanum manganite is provided which is used as the cathode in high temperature, solid oxide electrolyte fuel cells and generators. The air electrode composition of this invention has a much lower fabrication cost as a result of using a lower cost lanthanide mixture, either a natural mixture or an unfinished lanthanide concentrate obtained from a natural mixture subjected to incomplete purification, as the raw material in place of part or all of the higher cost individual lanthanum. The mixed lanthanide primarily contains a mixture of at least La, Ce, Pr, and Nd, or at least La, Ce, Pr, Nd and Sm in its lanthanide content, but can also include minor amounts of other lanthanides and trace impurities. The use of lanthanides in place of some or all of the lanthanum also increases the dimensional stability of the air electrode. This low cost air electrode can be fabricated as a cathode for use in high temperature, solid oxide fuel cells and generators.

Kuo, Lewis J. H. (Monroeville, PA); Singh, Prabhakar (Export, PA); Ruka, Roswell J. (Churchill Boro, PA); Vasilow, Theodore R. (Penn Township, PA); Bratton, Raymond J. (Delmont, PA)

1997-01-01T23:59:59.000Z

448

Electrochemical cell utilizing molten alkali metal electrode-reactant  

DOE Patents (OSTI)

An improved electrochemical cell comprising an additive-modified molten alkali metal electrode-reactant and/or electrolyte is disclosed. Various electrochemical cells employing a molten alkali metal, e.g., sodium, electrode in contact with a cationically conductive ceramic membrane experience a lower resistance and a lower temperature coefficient of resistance whenever small amounts of selenium are present at the interface of the electrolyte and the molten alkali metal. Further, cells having small amounts of selenium present at the electrolyte-molten metal interface exhibit less degradation of the electrolyte under long term cycling conditions.

Virkar, Anil V. (Sandy, UT); Miller, Gerald R. (Salt Lake City, UT)

1983-11-04T23:59:59.000Z

449

Fuel Cell Technologies Program Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Fuel Cell Technologies Fuel Cell Technologies Program Overview Program Overview Richard Farmer Richard Farmer Acting Acting Program Program Manager Manager Acting Acting Program Program Manager Manager 2010 Annual Merit Review and Peer Evaluation Meeting 2010 Annual Merit Review and Peer Evaluation Meeting (7 June 2010) (7 June 2010) The Administration's Clean Energy Goals 9 9 Double Renewable Double Renewable Energy Capacity by 2012 9 Invest $150 billion over ten years i in energy R&D to transition to a clean energy economy clean energy economy 9 Reduce GHG emissions 83% by 2050 2 t t Æ Æ F l ll ff hi hl ffi i di f l d Fuel Cells Address Our Key Energy Challenges Increasing Energy Increasing Energy Ef ficiency and Resource Diversity Efficiency and Resource Diversity Æ Æ Fuel cells offer a highly efficient way to use diverse fuels and energy sources.

450

Navy fuel cell demonstration project.  

DOE Green Energy (OSTI)

This is the final report on a field evaluation by the Department of the Navy of twenty 5-kW PEM fuel cells carried out during 2004 and 2005 at five Navy sites located in New York, California, and Hawaii. The key objective of the effort was to obtain an engineering assessment of their military applications. Particular issues of interest were fuel cell cost, performance, reliability, and the readiness of commercial fuel cells for use as a standalone (grid-independent) power option. Two corollary objectives of the demonstration were to promote technological advances and to improve fuel performance and reliability. From a cost perspective, the capital cost of PEM fuel cells at this stage of their development is high compared to other power generation technologies. Sandia National Laboratories technical recommendation to the Navy is to remain involved in evaluating successive generations of this technology, particularly in locations with greater environmental extremes, and it encourages their increased use by the Navy.

Black, Billy D.; Akhil, Abbas Ali

2008-08-01T23:59:59.000Z

451

Fuel cell with internal flow control  

SciTech Connect

A fuel cell stack is provided with a plurality of fuel cell cassettes where each fuel cell cassette has a fuel cell with an anode and cathode. The fuel cell stack includes an anode supply chimney for supplying fuel to the anode of each fuel cell cassette, an anode return chimney for removing anode exhaust from the anode of each fuel cell cassette, a cathode supply chimney for supplying oxidant to the cathode of each fuel cell cassette, and a cathode return chimney for removing cathode exhaust from the cathode of each fuel cell cassette. A first fuel cell cassette includes a flow control member disposed between the anode supply chimney and the anode return chimney or between the cathode supply chimney and the cathode return chimney such that the flow control member provides a flow restriction different from at least one other fuel cell cassettes.

Haltiner, Jr., Karl J. (Fairport, NY); Venkiteswaran, Arun (Karnataka, IN)

2012-06-12T23:59:59.000Z

452

fuel cells | OpenEI  

Open Energy Info (EERE)

cells cells Dataset Summary Description Developed for the U.S. Department of Energy's Office of Fuel Cell Technologies by Argonne National Laboratory and RCF Economic and Financial Consulting, Inc., JOBS and economic impacts of Fuel Cells (JOBS FC) is a spreadsheet model that estimates economic impacts from the manufacture and use of select types of fuel cells. Source Argonne Date Released Unknown Date Updated Unknown Keywords fuel cells Job Creation Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon File without Macros. Full version at official link. (xlsx, 2.8 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Attribution License Comment From Argonne National Lab

453

Molten carbonate fuel cell research at ORNL  

DOE Green Energy (OSTI)

The activities at ORNL during the period July 1976 to February 1977 on the molten carbonate fuel cell program, funded by the ERDA Division of Conservation Research and Technology, are summarized. This period marks the initiation of molten carbonate fuel cell research at ORNL, making use of the extensive background of expertise and facilities in molten salt research. The activities described include a literature survey on molten carbonates, design, acquisition and installation of apparatus for experimental studies of molten carbonates, initial experiments on materials compatibility with molten carbonates, electrolysis experiments for the determination of transference numbers, and theoretical studies of transport behavior and the coupling of mass flows in molten carbonate mixtures. Significant accomplishments were the theoretical prediction of a possibly appreciable change in the alkali ion ratio at molten carbonate fuel cell electrodes, operated at high current densities, as a result of mobility differences of the alkali ions; design, construction and assembly of an electrolysis cell, and initiation of measurements of composition profiles in mixed alkali carbonate electrolytes; initiation of differential scanning calorimetry of pure alkali carbonates for quantitative measurement of transition enthalpies, eventually leading to new, more reliable values of the enthalpies and free energies of formation of the pure and mixed carbonates.

Braunstein, J.; Bronstein, H. R.; Cantor, S.; Heatherly, D.; Vallet, C. E.

1977-05-01T23:59:59.000Z

454

Fuel Cell Technologies Office: Market Analysis Reports  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Resources Information Resources Printable Version Share this resource Send a link to Fuel Cell Technologies Office: Market Analysis Reports to someone by E-mail Share Fuel Cell Technologies Office: Market Analysis Reports on Facebook Tweet about Fuel Cell Technologies Office: Market Analysis Reports on Twitter Bookmark Fuel Cell</