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Note: This page contains sample records for the topic "fuel cell cathode" 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

Cathodes for ceria-based fuel cells  

SciTech Connect (OSTI)

Work is underway to develop a solid oxide fuel cell that has a ceria-based electrolyte and operates at lower temperatures (500-600{degrees}C) than conventional zirconia-based cells. At present the performance of this ceria-based solid oxide fuel cell is limited by the polarization of conventional cathode materials. The performance of alternative cathodes was measured by impedance spectroscopy and dc polarization. The performance was found to improve by using a thin dense interface layer and by using two-phase cathodes with an electrolyte and an electronic phase. The cathode performance was also found to increase with increasing ionic conductivity for single phase cathodes.

Doshi, R.; Krumpelt, M. [Argonne National Lab., IL (United States); Ricvhards, V.L. [Tri-State Univ., Angola, IN (United States). Dept. of Mech. & Aerospace Engr.

1997-08-01T23:59:59.000Z

2

Cathode side hardware for carbonate fuel cells  

DOE Patents [OSTI]

Carbonate fuel cathode side hardware having a thin coating of a conductive ceramic formed from one of LSC (La.sub.0.8Sr.sub.0.2CoO.sub.3) and lithiated NiO (Li.sub.xNiO, where x is 0.1 to 1).

Xu, Gengfu (Danbury, CT); Yuh, Chao-Yi (New Milford, CT)

2011-03-29T23:59:59.000Z

3

Molten carbonate fuel cell cathode with mixed oxide coating  

DOE Patents [OSTI]

A molten carbonate fuel cell cathode having a cathode body and a coating of a mixed oxygen ion conductor materials. The mixed oxygen ion conductor materials are formed from ceria or doped ceria, such as gadolinium doped ceria or yttrium doped ceria. The coating is deposited on the cathode body using a sol-gel process, which utilizes as precursors organometallic compounds, organic and inorganic salts, hydroxides or alkoxides and which uses as the solvent water, organic solvent or a mixture of same.

Hilmi, Abdelkader; Yuh, Chao-Yi

2013-05-07T23:59:59.000Z

4

Advanced Cathode Catalysts and Supports for PEM Fuel Cells  

E-Print Network [OSTI]

1 Advanced Cathode Catalysts and Supports for PEM Fuel Cells Mark K. Debe 3M Company May 15, 2012 group) Project Management - 3M (A. Steinbach, M. Kurkowski, S. Hendricks, A. Hester, P. Kadera, G

5

Cathode side hardware for carbonate fuel cells  

DOE Patents [OSTI]

Carbonate fuel cathode side hardware having a thin coating of a conductive ceramic formed from one of Perovskite AMeO.sub.3, wherein A is at least one of lanthanum and a combination of lanthanum and strontium and Me is one or more of transition metals, lithiated NiO (Li.sub.xNiO, where x is 0.1 to 1) and X-doped LiMeO.sub.2, wherein X is one of Mg, Ca, and Co.

Xu, Gengfu (Danbury, CT); Yuh, Chao-Yi (New Milford, CT)

2011-04-05T23:59:59.000Z

6

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

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

Functionally Graded Cathodes for Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

This DOE SECA project focused on both experimental and theoretical understanding of oxygen reduction processes in a porous mixed-conducting cathode in a solid oxide fuel cell (SOFC). Elucidation of the detailed oxygen reduction mechanism, especially the rate-limiting step(s), is critical to the development of low-temperature SOFCs (400 C to 700 C) and to cost reduction since much less expensive materials may be used for cell components. However, cell performance at low temperatures is limited primarily by the interfacial polarization resistances, specifically by those associated with oxygen reduction at the cathode, including transport of oxygen gas through the porous cathode, the adsorption of oxygen onto the cathode surface, the reduction and dissociation of the oxygen molecule (O{sub 2}) into the oxygen ion (O{sup 2-}), and the incorporation of the oxygen ion into the electrolyte. In order to most effectively enhance the performance of the cathode at low temperatures, we must understand the mechanism and kinetics of the elementary processes at the interfaces. Under the support of this DOE SECA project, our accomplishments included: (1) Experimental determination of the rate-limiting step in the oxygen reduction mechanism at the cathode using in situ FTIR and Raman spectroscopy, including surface- and tip-enhanced Raman spectroscopy (SERS and TERS). (2) Fabrication and testing of micro-patterned cathodes to compare the relative activity of the TPB to the rest of the cathode surface. (3) Construction of a mathematical model to predict cathode performance based on different geometries and microstructures and analyze the kinetics of oxygen-reduction reactions occurring at charged mixed ionic-electronic conductors (MIECs) using two-dimensional finite volume models with ab initio calculations. (4) Fabrication of cathodes that are graded in composition and microstructure to generate large amounts of active surface area near the cathode/electrolyte interface using a novel combustion chemical vapor deposition (CCVD) technique. (5) Application of advanced quantum chemical calculations to interpret measured spectroscopic information, as well as to guide design of high efficient cathode materials.

YongMan Choi; Meilin Liu

2006-09-30T23:59:59.000Z

9

Heterogeneous electrocatalysis in porous cathodes of solid oxide fuel cells  

E-Print Network [OSTI]

A general physics-based model is developed for heterogeneous electrocatalysis in porous electrodes and used to predict and interpret the impedance of solid oxide fuel cells. This model describes the coupled processes of oxygen gas dissociative adsorption and surface diffusion of the oxygen intermediate to the triple phase boundary, where charge transfer occurs. The model accurately captures the Gerischer-like frequency dependence and the oxygen partial pressure dependence of the impedance of symmetric cathode cells. Digital image analysis of the microstructure of the cathode functional layer in four different cells directly confirms the predicted connection between geometrical properties and the impedance response. As in classical catalysis, the electrocatalytic activity is controlled by an effective Thiele modulus, which is the ratio of the surface diffusion length (mean distance from an adsorption site to the triple phase boundary) to the surface boundary layer length (square root of surface diffusivity div...

Fu, Y; Bertei, A; Qi, C; Mohanram, A; Pietras, J D; Bazant, M Z

2014-01-01T23:59:59.000Z

10

Short communication Performance of microbial fuel cells with and without Nafion solution as cathode  

E-Print Network [OSTI]

Short communication Performance of microbial fuel cells with and without Nafion solution as cathode online 31 March 2010 Keywords: Microbial fuel cell (MFC) Nafion Electrochemical impedance spectroscopy (EIS) Internal resistance Electricity production The performance of tubular microbial fuel cells (MFC

11

Heat and Mass Transfer Modeling of Dry Gases in the Cathode of PEM Fuel Cells  

E-Print Network [OSTI]

Heat and Mass Transfer Modeling of Dry Gases in the Cathode of PEM Fuel Cells M.J. Kermani1 J and N2, through the cathode of a proton exchange membrane (PEM) fuel cell is studied numerically) an energy equation, written in a form that has enthalpy as the dependent variable. Keywords: PEM fuel cells

Stockie, John

12

Degradation of Ionic Pathway in PEM Fuel Cell Cathode  

SciTech Connect (OSTI)

The degradation of the ionic pathway throughout the catalyst layer in proton exchange membrane fuel cells was studied under an accelerated stress test of catalyst support (potential hold at 1.2 V). Electrochemical behaviors of the cathode based on graphitic mesoporous carbon supported Pt catalyst were examined using electrochemical impedance spectroscopy and cyclic voltammetry. Impedance data were plotted and expressed in the complex capacitance form to determine useful parameters in the transmission line model: the double-layer capacitance, peak frequency, and ionic resistance. Electrochemical surface area and hydrogen crossover current through the membrane were estimated from cyclic voltammogram, while cathode Faradaic resistance was compared with ionic resistance as a function of test time. It was observed that during an accelerated stress test of catalyst support, graphitic mesoporous carbon becomes hydrophilic which increases interfacial area between the ionomer and the catalyst up to 100 h. However, the ionic resistance in the catalyst layer drastically increases after 100 h with further carbon support oxidation. The underlying mechanism has been studied and it was found that significant degradation of ionic pathway throughout the catalyst layer due to catalyst support corrosion induces uneven hydration and mechanical stress in the ionomer.

Park, Seh Kyu; Shao, Yuyan; Wan, Haiying; Viswanathan, Vilayanur V.; Towne, Silas A.; Rieke, Peter C.; Liu, Jun; Wang, Yong

2011-11-12T23:59:59.000Z

13

Methanol-Tolerant Cathode Catalyst Composite For Direct Methanol Fuel Cells  

DOE Patents [OSTI]

A direct methanol fuel cell (DMFC) having a methanol fuel supply, oxidant supply, and its membrane electrode assembly (MEA) formed of an anode electrode and a cathode electrode with a membrane therebetween, a methanol oxidation catalyst adjacent the anode electrode and the membrane, an oxidant reduction catalyst adjacent the cathode electrode and the membrane, comprises an oxidant reduction catalyst layer of a platinum-chromium alloy so that oxidation at the cathode of methanol that crosses from the anode through the membrane to the cathode is reduced with a concomitant increase of net electrical potential at the cathode electrode.

Zhu, Yimin (Los Alamos, NM); Zelenay, Piotr (Los Alamos, NM)

2006-03-21T23:59:59.000Z

14

Methanol-tolerant cathode catalyst composite for direct methanol fuel cells  

DOE Patents [OSTI]

A direct methanol fuel cell (DMFC) having a methanol fuel supply, oxidant supply, and its membrane electrode assembly (MEA) formed of an anode electrode and a cathode electrode with a membrane therebetween, a methanol oxidation catalyst adjacent the anode electrode and the membrane, an oxidant reduction catalyst adjacent the cathode electrode and the membrane, comprises an oxidant reduction catalyst layer of Pt.sub.3Cr/C so that oxidation at the cathode of methanol that crosses from the anode through the membrane to the cathode is reduced with a concomitant increase of net electrical potential at the cathode electrode.

Zhu, Yimin (Los Alamos, NM); Zelenay, Piotr (Los Alamos, NM)

2006-09-05T23:59:59.000Z

15

Functionally Graded Cathodes for Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

The main objective of this DOE project is to demonstrate that the performance and long-term stability of the state-of-the-art LSCF cathode can be enhanced by a catalytically active coating (e.g., LSM or SSC). We have successfully developed a methodology for reliably evaluating the intrinsic surface catalytic properties of cathode materials. One of the key components of the test cell is a dense LSCF film, which will function as the current collector for the electrode material under evaluation to eliminate the effect of ionic and electronic transport. Since it is dense, the effect of geometry would be eliminated as well. From the dependence of the electrode polarization resistance on the thickness of a dense LSCF electrode and on partial pressure of oxygen, we have confirmed that the surface catalytic activity of LSCF limits the performances of LSCF-based cathodes. Further, we have demonstrated, using test cells of different configurations, that the performance of LSCF-based electrodes can be significantly enhanced by infiltration of a thin film of LSM or SSC. In addition, the stability of LSCF-based cathodes was also improved by infiltration of LSM or SSC. While the concept feasibility of the electrode architecture is demonstrated, many details are yet to be determined. For example, it is not clear how the surface morphology, composition, and thickness of the coatings change under operating conditions over time, how these changes influence the electrochemical behavior of the cathodes, and how to control the microscopic details of the coatings in order to optimize the performance. The selection of the catalytic materials as well as the detailed microstructures of the porous LSCF and the catalyst layer may critically impact the performance of the proposed cathodes. Further, other fundamental questions still remain; it is not clear why the degradation rates of LSCF cathodes are relatively high, why a LSM coating improves the stability of LSCF cathodes, which catalysts would be most effective for LSCF, and how to achieve further enhancement of the performance and stability of SOFC cathodes.

Lei Yang; Ze Liu; Shizhone Wang; Jaewung Lee; Meilin Liu

2008-04-30T23:59:59.000Z

16

Iron-based perovskite cathodes for solid oxide fuel cells  

DOE Patents [OSTI]

An A and/or A' site deficient perovskite of general formula of (A1-xA'x)1-yFeO3-.delta. or of general formula A1-x-yA'xFeO3-67, wherein A is La alone or with one or more of the rare earth metals or a rare earth metal other than Ce alone or a combination of rare earth metals and X is in the range of from 0 to about 1; A' is Sr or Ca or mixtures thereof and Y is in the range of from about 0.01 to about 0.3; .delta. represents the amount of compensating oxygen loss. If either A or A' is zero the remaining A or A' is deficient. A fuel cell incorporating the inventive perovskite as a cathode is disclosed as well as an oxygen separation membrane. The inventive perovskite is preferably single phase.

Ralph, James M.; Rossignol, Cecile C.R.; Vaughey, John T.

2007-01-02T23:59:59.000Z

17

Effect of nitrate on the performance of single chamber air cathode microbial fuel cells  

E-Print Network [OSTI]

Effect of nitrate on the performance of single chamber air cathode microbial fuel cells Chontisa Accepted 26 August 2008 Published online 11 September 2008 Keywords: Microbial fuel cell Denitrification microbial fuel cells (MFCs) has drawn much attention recently as a new approach of waste- water treatment

Tullos, Desiree

18

Novel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodes  

E-Print Network [OSTI]

Novel anti-flooding poly(dimethylsiloxane) (PDMS) catalyst binder for microbial fuel cell cathodes) was tested as a catalyst binder in a microbial fuel cell. 2012 Keywords: Microbial fuel cell Poly(dimethylsiloxane) Anti-flooding Catalyst binder a b s t r a c

19

Oxygen diffusion in solid oxide fuel cell cathode and electrolyte materials: mechanistic insights from atomistic simulations  

E-Print Network [OSTI]

. Current targets of cost and durability necessitate solid oxide fuel cells to operate in the intermediateOxygen diffusion in solid oxide fuel cell cathode and electrolyte materials: mechanistic insights oxide fuel cells are of technological interest as they offer high efficiency for energy conversion

Yildiz, Bilge

20

Alkaline Microfluidic Hydrogen-Oxygen Fuel Cell as a Cathode Characterization Platform  

E-Print Network [OSTI]

Alkaline Microfluidic Hydrogen-Oxygen Fuel Cell as a Cathode Characterization Platform Fikile R of hydrogen H2 and oxygen O2 . Operating fuel cells in alkaline media, as opposed to acidic media, has on an alkaline microfluidic fuel cell for catalyst and electrode characterization. Its constantly refreshing

Kenis, Paul J. A.

Note: This page contains sample records for the topic "fuel cell cathode" 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

Three-dimensional effects of liquid water flooding in the cathode of a PEM fuel cell  

E-Print Network [OSTI]

. Researchers all over the world are focusing on optimizing this system to be cost competitive with energy conversion devices currently available. It is a well known fact that the cathode of the PEM fuel cell is the performance limiting component due...THREE DIMENSIONAL EFFECTS OF LIQUID WATER FLOODING IN THE CATHODE OF A PEM FUEL CELL by Dilip Natarajan and Trung Van Nguyen* Department of Chemical and Petroleum Engineering University of Kansas Lawrence, KS 66045, USA Submitted...

Natarajan, Dilip; Van Nguyen, Trung

2003-03-27T23:59:59.000Z

22

Fuel Cell Cathode Air Filters: Methodologies for Design and Optimization .  

E-Print Network [OSTI]

??Platinum catalyst used in PEM fuel cells experience performance degradation such as reduction in efficiency and life as a result of airborne contaminants. Research on… (more)

KENNEDY, DANIEL

2007-01-01T23:59:59.000Z

23

Microbial Fuel Cell Cathodes With Poly(dimethylsiloxane) Diffusion  

E-Print Network [OSTI]

applications of MFCs for wastewater treatment and bioenergy production. The main challenges for commercializing limited by cathode surface area and performance (9, 12, 13), and the price of cathode materials can

24

Computational Modeling of Electrolyte/Cathode Interfaces in Proton Exchange Membrane Fuel Cells  

E-Print Network [OSTI]

Computational Modeling of Electrolyte/Cathode Interfaces in Proton Exchange Membrane Fuel Cells Dr Proton exchange membrane fuel cells (PEMFCs) are alternative energy conversion devices that efficiently. The fundamental relationship between operating conditions and device performance will help to optimize the device

Bjørnstad, Ottar Nordal

25

Condensation in the Cathode of a PEM Fuel Cell M. J. Kermani J. M. Stockie A. G. Gerber  

E-Print Network [OSTI]

Condensation in the Cathode of a PEM Fuel Cell M. J. Kermani J. M. Stockie A. G. Gerber University@unb.ca. ABSTRACT Three species condensing flow in the cathode of a Proton Exchange Membrane (PEM) fuel cell of an ongoing effort to carefully model individual elements of the PEM fuel cell, with a par- ticular focus

Stockie, John

26

Nanorod PEM Fuel Cell Cathodes with Controlled Porosity M. D. Gasda, G. A. Eisman,* and D. Gallz  

E-Print Network [OSTI]

Nanorod PEM Fuel Cell Cathodes with Controlled Porosity M. D. Gasda, G. A. Eisman,* and D. Gallz as cathode electrodes in proton exchange membrane PEM fuel cells. Deposition on flat substrates yields February 4, 2010. Proton exchange membrane PEM fuel cells are promising for future automotive applications

Gall, Daniel

27

Electrochemical Performance and Stability of the Cathode for Solid Oxide Fuel Cells IV. On the Ohmic loss in anode supported button cells with LSM or LSCF cathodes  

SciTech Connect (OSTI)

Anode-supported solid oxide fuel cells (SOFC) with a variety of YSZ electrolyte thicknesses were fabricated by tape casting and lamination. The preparation of the YSZ electrolyte tapes with various thicknesses was accomplished by using doctor blades with different gaps between the precision machined, polished blade and the casting surface. The green tape was cut into discs, sintered at 1385°C for 2 h, and subsequently creep-flattened at 1350°C for 2 h. Either LSCF with an SDC interlayer or LSM+YSZ composite was used as the cathode material for the fuel cells. The ohmic resistances of these anode-supported fuel cells were characterized by electrochemical impedance spectroscopy at temperatures from 500°C to 750°C. A linear relationship was found between the ohmic resistance of the fuel cell and the YSZ electrolyte thickness at all the measuring temperatures for both LSCF and LSM+YSZ cathode fuel cells. The ionic conductivities of the YSZ electrolyte, derived for the fuel cells with LSM+YSZ or LSCF cathodes, were independent of the cathode material and cell configuration. The ionic conductivities of the YSZ electrolyte was slightly lower than that of the bulk material, possibly due to Ni-doping into the electrolyte. The fuel cell with a SDC interlayer and LSCF cathode showed larger intercept resistance than the fuel cell with LSM+YSZ cathode, which was possibly due to the imperfect contact between the SDC interlayer and the YSZ electrolyte and the migration of Zr into the SDC interlayer to form an insulating solid solution during cell fabrication. Calculations of the contribution of the YSZ electrolyte to the total ohmic resistance showed that YSZ was still a satisfactory electrolyte at temperatures above 650°C. Explorations should be directed to reduce the intercept resistance to achieve significant improvement in cell performance.

Lu, Zigui; Zhou, Xiao Dong; Templeton, Jared W.; Stevenson, Jeffry W.

2010-05-08T23:59:59.000Z

28

An intermediate-temperature solid oxide fuel cell with electrospun nanofiber cathode  

SciTech Connect (OSTI)

Lanthanum strontium cobalt ferrite (LSCF) nanofibers have been fabricated by the electrospinning method and used as the cathode of an intermediate-temperature solid oxide fuel cell (SOFC) with yttria-stabilized zirconia (YSZ) electrolyte. The three-dimensional nanofiber network cathode has several advantages: (i) high porosity; (ii) high percolation; (iii) continuous pathway for charge transport; (iv) good thermal stability at the operating temperature; and (v) excellent scaffold for infiltration. The fuel cell with the monolithic LSCF nanofiber cathode exhibits a power density of 0.90 W cm{sup ?2} at 1.9 A cm{sup ?2} at 750 °C. The electrochemical performance of the fuel cell has been further improved by infiltration of 20 wt% of gadolinia-doped ceria (GDC) into the LSCF nanofiber cathode. The fuel cell with the LSCF–20% GDC composite cathode shows a power density of 1.07 W cm{sup ?2} at 1.9 A cm{sup ?2} at 750 °C. The results obtained show that one-dimensional nanostructures such as nanofibers hold great promise as electrode materials for intermediate-temperature SOFCs.

Zhi, Mingjia; Lee, Shiwoo; Miller, Nicholas; Menzler, Norbert H.; Wu, Nianqiang

2012-05-01T23:59:59.000Z

29

Carbon Dioxide Addition to Microbial Fuel Cell Cathodes Maintains  

E-Print Network [OSTI]

States Department of Agriculture, Agricultural Research Service (ARS), National Center for Agricultural-cathode MFC, CO2 addition resulted in a stable catholyte film pH of 6.61 ( 0.12 and a 152% increase in steady

Angenent, Lars T.

30

Supporting Information Power generation by packed-bed air-cathode microbial fuel cells  

E-Print Network [OSTI]

1 Supporting Information Power generation by packed-bed air-cathode microbial fuel cells Xiaoyuan b a State Key Joint Laboratory of Environment Simulation and Pollution Control, THU­ VEOLIA Informatics, China University of Mining and Technology, Xuzhou 221116, PR China * Corresponding author: E

31

Cathode and electrolyte materials for solid oxide fuel cells and ion transport membranes  

DOE Patents [OSTI]

Novel cathode, electrolyte and oxygen separation materials are disclosed that operate at intermediate temperatures for use in solid oxide fuel cells and ion transport membranes based on oxides with perovskite related structures and an ordered arrangement of A site cations. The materials have significantly faster oxygen kinetics than in corresponding disordered perovskites.

Jacobson, Allan J; Wang, Shuangyan; Kim, Gun Tae

2014-01-28T23:59:59.000Z

32

The primary components of a fuel cell are an ion conducting electrolyte, a cathode, and an anode, as  

E-Print Network [OSTI]

The primary components of a fuel cell are an ion conducting electrolyte, a cathode, and an anode chemical driving force for the oxygen and the hydrogen to react to produce water. In the fuel cell, however for the many categories of fuel cells under development today. Desirable characteristics of fuel cell

Haile, Sossina M.

33

Advanced Cathode Catalysts and Supports for PEM Fuel Cells  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustionImprovement3-- ------------------------------Chapter 39.208-006 Advance

34

Solid oxide fuel cells having porous cathodes infiltrated with oxygen-reducing catalysts  

DOE Patents [OSTI]

Solid-oxide fuel cells include an electrolyte and an anode electrically coupled to a first surface of the electrolyte. A cathode is provided, which is electrically coupled to a second surface of the electrolyte. The cathode includes a porous backbone having a porosity in a range from about 20% to about 70%. The porous backbone contains a mixed ionic-electronic conductor (MIEC) of a first material infiltrated with an oxygen-reducing catalyst of a second material different from the first material.

Liu, Meilin; Liu, Ze; Liu, Mingfei; Nie, Lifang; Mebane, David Spencer; Wilson, Lane Curtis; Surdoval, Wayne

2014-08-12T23:59:59.000Z

35

Degradation of Ionic Pathway in PEM Fuel Cell Cathode. | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesData Files Data Files 1B&W Y-12studies inB Sign InRDegradation

36

Synthesis and characterization of the Au-modified Pd cathode catalyst for alkaline direct ethanol fuel cells  

E-Print Network [OSTI]

Available online 3 August 2010 Keywords: Fuel cell Alkaline direct ethanol fuel cell Oxygen reduction Carbon in large quantities from agricultural products or biomass. Hence, direct ethanol fuel cells (DEFCs) haveSynthesis and characterization of the Au-modified Pd cathode catalyst for alkaline direct ethanol

Zhao, Tianshou

37

Sputter-Deposited Pt/CrN Nanoparticle PEM Fuel Cell Cathodes: Limited Proton Conductivity Through Electrode  

E-Print Network [OSTI]

Sputter-Deposited Pt/CrN Nanoparticle PEM Fuel Cell Cathodes: Limited Proton Conductivity Through for proton exchange membrane PEM fuel cells. X-ray diffraction and scanning electron microscopy show manuscript received September 17, 2009. Published November 13, 2009. Proton exchange membrane PEM fuel cells

Gall, Daniel

38

Composite Cathode for High-Power Density Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

Reduction of solid oxide fuel cell (SOFC) operating temperature will play a key role in reducing the stack cost by allowing the use of low-cost metallic interconnects and new approaches to sealing, while making applications such as transportation more feasible. Reported results for anode-supported SOFCs show that cathode polarization resistance is the primary barrier to achieving high power densities at operating temperatures of 700 C and lower. This project aims to identify and develop composite cathodes that could reduce SOFC operating temperatures below 700 C. This effort focuses on study and use of (La,Sr)(Co,Fe)O{sub 3} (LSCF) based composite cathodes, which have arguably the best potential to substantially improve on the currently-used, (La,Sr)MnO{sub 3}-Yttria-stabilized Zirconia. During this Phase I, it was successfully demonstrated that high performances can be achieved with LSCF/Gadolinium-Doped Ceria composite cathodes on Ni-based anode supported cells operating at 700 C or lower. We studied electrochemical reactions at LSCF/Yttria-stabilized Zirconia (YSZ) interfaces, and observed chemical reactions between LSCF and YSZ. By using ceria electrolytes or YSZ electrolytes with ceria diffusion barrier layers, the chemical reactions between LSCF and electrolytes were prevented under cathode firing conditions necessary for the optimal adhesion of the cathodes. The protection provided by ceria layer is expected to be adequate for stable long-term cathode performances, but more testing is needed to verify this. Using ceria-based barrier layers, high performance Ni-YSZ anode supported cells have been demonstrated with maximum power densities of 0.8W/cm2 at 700 C and 1.6W/cm{sup 2} at 800 C. Ni-SDC anode supported cells with SDC electrolytes yielded >1W/cm{sup 2} at 600 C. We speculate that the power output of Ni-YSZ anode supported cell at 700 C and lower, was limited by the quality of the Ceria and Ceria YSZ interface. Improvements in the low-temperature performances are expected based on further development of barrier layer fabrication processes and optimization of cathode microstructure.

Ilwon Kim; Scott Barnett; Yi Jiang; Manoj Pillai; Nikkia McDonald; Dan Gostovic; Zhongryang Zhan; Jiang Liu

2004-01-31T23:59:59.000Z

39

Optimization of the Cathode Catalyst Layer Composition of a PEM Fuel Cell Using a Novel 2-Step Preparation Method  

E-Print Network [OSTI]

For good performance and high durability PEM fuel cells run at high water saturation levels. However, excess liquid water generated by the oxygen reduction reaction at the cathode can block pores in the catalyst layer so ...

Friedmann, Roland

2009-03-05T23:59:59.000Z

40

Combined Theoretical and Experimental Analysis of Processes Determining Cathode Performance in Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

Solid oxide fuel cells (SOFC) are under intensive investigation since the 1980’s as these devices open the way for ecologically clean direct conversion of the chemical energy into electricity, avoiding the efficiency limitation by Carnot’s cycle for thermochemical conversion. However, the practical development of SOFC faces a number of unresolved fundamental problems, in particular concerning the kinetics of the electrode reactions, especially oxygen reduction reaction. We review recent experimental and theoretical achievements in the current understanding of the cathode performance by exploring and comparing mostly three materials: (La,Sr)MnO3 (LSM), (La,Sr)(Co,Fe)O3 (LSCF) and (Ba,Sr)(Co,Fe)O3 (BSCF). Special attention is paid to a critical evaluation of advantages and disadvantages of BSCF, which shows the best cathode kinetics known so far for oxides. We demonstrate that it is the combined experimental and theoretical analysis of all major elementary steps of the oxygen reduction reaction which allows us to predict the rate determining steps for a given material under specific operational conditions and thus control and improve SOFC performance.

Kukla, Maija M.; Kotomin, Eugene Alexej; Merkle, R.; Mastrikov, Yuri; Maier, J.

2013-02-11T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

Final Scientific Report : Development of Transition Metal/ Chalcogen Based Cathode Catalysts for PEM Fuel Cells  

SciTech Connect (OSTI)

The aim of this project was to investigate the potential for using base metal sulfides and selenides as low cost replacements for precious metal catalysts, such as platinum, currently being used in PEM fuel cells. The approach was to deposit thin films of the materials to be evaluated onto inert electrodes and evaluate their activity for the cathode reaction (oxygen reduction) as well as ex-situ structural and compositional characterization. The most active materials identified are CoS2 and the 50:50 solid solution (Co,Ni)S2. However, the OCP of these materials is still considered too low, at 0.83V and 0.89V vs. RHE respectively, for testing in fuel cells. The methods employed here were necessary to compare with the activity of platinum as, when nano-dispersed on carbon supports, the active surface area of these materials is difficult to measure, making comparisons inaccurate. This research adds to the knowledge of potential candidates for platinum replacement in order to reduce the cost of PEM fuel cell technology and promote commercialization. Although the fabrication methods employed here are strictly experimental, methods were also developed to produce nano-dispersed catalysts with similar compositions, structure and activity. Cycling of these catalysts to highly oxidizing potentials resulted in an increase of the open circuit voltage to approach that of platinum, however, it proved difficult to determine why using these dispersed materials. The potential for non-precious, non-metallic, low cost, compound catalysts for PEM fuel cells has been investigated and demonstrated.

Campbell, Stephen, A.

2008-02-29T23:59:59.000Z

42

Scalable air cathode microbial fuel cells using glass fiber separators, plastic mesh supporters, and graphite fiber brush anodes  

E-Print Network [OSTI]

Bioelectrochemical Microbial fuel cell Biofuels Separators a b s t r a c t The combined use of brush anodes and glass was 75 ± 1 W/m3 . Removing the separator decreased power by 8%. Adding a second cathode increased power into the anode chamber. The use of a cloth separator (J-cloth, JC) substan- tially improved power generation

43

Power generation by packed-bed air-cathode microbial fuel cells Xiaoyuan Zhang a,b  

E-Print Network [OSTI]

Power generation by packed-bed air-cathode microbial fuel cells Xiaoyuan Zhang a,b , Juan Shi c Laboratory of Environment Simulation and Pollution Control, THU­VEOLIA Environment Joint Research Center Park, PA 16802, USA c School of Environment Science and Spatial Informatics, China University of Mining

44

OPTIMIZATION OF THE CATHODE LONG-TERM STABILITY IN MOLTEN CARBONATE FUEL CELLS: EXPERIMENTAL STUDY AND MATHEMATICAL MODELING  

SciTech Connect (OSTI)

The dissolution of NiO cathodes during cell operation is a limiting factor to the successful commercialization of molten carbonate fuel cells (MCFCs). Microencapsulation of the NiO cathode has been adopted as a surface modification technique to increase the stability of NiO cathodes in the carbonate melt. The material used for surface modification should possess thermodynamic stability in the molten carbonate and also should be electro catalytically active for MCFC reactions. A simple first principles model was developed to understand the influence of exchange current density and conductivity of the electrode material on the polarization of MCFC cathodes. The model predictions suggest that cobalt can be used to improve the corrosion resistance of NiO cathode without affecting its performance. Cobalt was deposited on NiO cathode by electroless deposition. The morphology and thermal oxidation behavior of Co coated NiO was studied using scanning electron microscopy and thermal gravimetric analysis respectively. The electrochemical performance of cobalt encapsulated NiO cathodes were investigated with open circuit potential measurement and current-potential polarization studies. These results were compared to that of bare NiO. The electrochemical oxidation behavior of cobalt-coated electrodes is similar to that of the bare NiO cathode. Dissolution of nickel into the molten carbonate melt was less in case of cobalt encapsulated nickel cathodes. Co coated on the surface prevents the dissolution of Ni in the melt and thereby stabilizes the cathode. Finally, cobalt coated nickel shows similar polarization characteristics as nickel oxide. A similar surface modification technique has been used to improve the performance of the SS 304 current collectors used in MCFC cells. SS 304 was encapsulated with nanostructured layers of NiCo and NiMo by electroless deposition. The corrosion behavior of bare and surface modified SS 304 in molten carbonate under cathode gas atmosphere was investigated with cyclic voltammetry, open circuit potential studies, Tafel polarization, impedance analysis and atomic absorption spectroscopy. This study confirms that the presence of surface modification leads to the formation of complex scales with better barrier properties and electronic conductivity.

Dr. Ralph E. White

2000-09-30T23:59:59.000Z

45

OPTIMIZATION OF THE CATHODE LONG-TERM STABILITY IN MOLTEN CARBONATE FUEL CELLS: EXPERIMENTAL STUDY AND MATHEMATICAL MODELING  

SciTech Connect (OSTI)

This project focused on addressing the two main problems associated with state of art Molten Carbonate Fuel Cells, namely loss of cathode active material and stainless steel current collector deterioration due to corrosion. We followed a dual approach where in the first case we developed novel materials to replace the cathode and current collector currently used in molten carbonate fuel cells. In the second case we improved the performance of conventional cathode and current collectors through surface modification. States of art NiO cathode in MCFC undergo dissolution in the cathode melt thereby limiting the lifetime of the cell. To prevent this we deposited cobalt using an electroless deposition process. We also coated perovskite (La{sub 0.8}Sr{sub 0.2}CoO{sub 3}) in NiO thorough a sol-gel process. The electrochemical oxidation behavior of Co and perovskites coated electrodes is similar to that of the bare NiO cathode. Co and perovskite coatings on the surface decrease the dissolution of Ni into the melt and thereby stabilize the cathode. Both, cobalt and provskites coated nickel oxide, show a higher polarization compared to that of nickel oxide, which could be due to the reduced surface area. Cobalt substituted lithium nickel oxide (LiNi{sub 0.8}Co{sub 0.2}O{sub 2}) and lithium cobalt oxide were also studied. LiNi{sub x}Co{sub 1-x}O{sub 2} was synthesized by solid-state reaction procedure using lithium nitrate, nickel hydroxide and cobalt oxalate precursor. LiNi{sub x}Co{sub 1-x}O{sub 2} showed smaller dissolution of nickel than state of art nickel oxide cathode. The performance was comparable to that of nickel oxide. The corrosion of the current collector in the cathode side was also studied. The corrosion characteristics of both SS304 and SS304 coated with Co-Ni alloy were studied. This study confirms that surface modification of SS304 leads to the formation of complex scales with better barrier properties and better electronic conductivity at 650 C. A three phase homogeneous model was developed to simulate the performance of the molten carbonate fuel cell cathode and the complete fuel cell. The homogeneous model is based on volume averaging of different variables in the three phases over a small volume element. This approach can be used to model porous electrodes as it represents the real system much better than the conventional agglomerate model. Using the homogeneous model the polarization characteristics of the MCFC cathode and fuel cell were studied under different operating conditions. Both the cathode and the full cell model give good fits to the experimental data.

Hector Colonmer; Prabhu Ganesan; Nalini Subramanian; Dr. Bala Haran; Dr. Ralph E. White; Dr. Branko N. Popov

2002-09-01T23:59:59.000Z

46

Corrosion behavior and interfacial resistivity of bipolar plate materials under molten carbonate fuel cell cathode conditions  

SciTech Connect (OSTI)

A material is needed for bipolar plate materials in molten carbonate fuel cells (MCFCs) that combines the low oxide resistivity of 316L stainless steel (SS) with the low corrosion rate of the type 310 SS. The authors tested a group of materials that included Nitronic 50 SS and a newly developed high-temperature nickel-rich alloy, having chromium contents ranging from 16 to 31 wt %. Their results indicate that chromium content is the primary determinant of oxide scale composition and resistivity. In the MCFC cathode compartment, all tested alloys formed a duplex structure with an inner Cr-rich layer and an outer Fe-rich one. The composition of the inner Cr-rich layer was determined by the chromium content of the base alloy and has a controlling effect on scale resistivity. Oxide scale resistivity was measured for three electrolyte compositions: Li/K, Li/Na, and newly developed (Li, Na, Ca, Ba) carbonates. Changes in the physical/mechanical properties (spallation/cracking) in the oxide scale of 316L SS provided an understanding of its resistivity fluctuations over time.

Schoeler, A.C.; Kaun, T.D.; Bloom, I.; Lanagan, M.; Krumpelt, M.

2000-03-01T23:59:59.000Z

47

OPTIMIZATION OF THE CATHODE LONG TERM STABILITY IN MOLTEN CARBONATE FUEL CELLS: EXPERIMENTAL STUDY AND MATHEMATICAL MODELING  

SciTech Connect (OSTI)

The cathode materials for molten carbonate fuel cells (MCFCs) must have low dissolution rate, high structural strength and good electrical conductivity. Currently available cathodes are made of lithiated NiO which have acceptable structural strength and conductivity. However a study carried out by Orfeld et al. and Shores et al. indicated that the nickel cathodes dissolved, then precipitated and reformed as dendrites across the electrolyte matrix. This results in a decrease in cell utilization and eventually leads to shorting of the cell. The solubility of NiO was found to depend upon the acidity/basicity of the melt (basicity is directly proportional to log P{sub CO2}), carbonate composition, H{sub 2}O partial pressure and temperature. Urushibata et al. found that the dissolution of the cathode is a primary life limiting constraint of MCFCs, particularly in pressurized operation. With currently available NiO cathodes, the goal of 40,000 hours for the lifetime of MCFC appears achievable with cell operation at atmospheric pressure. However, the cell life at 10 atm and higher cell pressures is in the range between 5,000 to 10,000 hours. The overall objective of this research is to develop a superior cathode for MCFC's with improved catalytic ability, enhanced corrosion resistance with low ohmic losses, improved electronic conductivity. We also plan to understand the corrosion processes occurring at the cathode/molten carbonate interface. The following cathode materials will be subjected to detailed electrochemical, performance, structural and corrosion studies. (i) Passivated NiO alloys using chemical treatment with yttrium ion implantation and anodic yttrium molybdate treatment; (ii) Novel composite materials based on NiO and nanosized Ce, Yt, Mo; (iii) Co doped LiNiO{sub 2} LiNiO{sub 2} doped with 10 to 20% Co (LiCo{sub 0.2}NiO{sub 2}) and NiO cathodes; and (iv) CoO as a replacement for NiO. Passivation treatments will inhibit corrosion and increase the stability of the cathode at high temperatures. Deposition of refractory metals (Mo, W, Li{sub 2}NiCrO{sub 4}) will impart stability to the cathode at high temperatures. Further it will also increase the electrocatalytic activity and corrosion resistance of the cathode. Doping with Co will decrease the alloy dissolution and increase the cycle life of the cathode. In the reporting period the oxidation behavior of Ni and Co in Li + Na carbonate eutectic was investigated under oxidizing environment using cyclic voltammetry, electrochemical impedance spectroscopy and potentiodynamic technique. The open circuit potential was monitored as a function of time in order to evaluate the material's reactivity in the melt.

Anand Durairajan; Bala Haran; Branko N. Popov; Ralph E. White

2000-05-01T23:59:59.000Z

48

A Carbon-Supported Copper Complex of 3,5-Diamino-1,2,4-triazole as a Cathode Catalyst for Alkaline Fuel Cell Applications  

E-Print Network [OSTI]

Fuel Cell Applications Fikile R. Brushett, Matthew S. Thorum, Nicholas S. Lioutas, Matthew S. Naughton-tri/C) is investigated as a cathode material using an alkaline microfluidic H2/O2 fuel cell. The absolute Cu be realized by optimizing catalyst and electrode preparation procedures. Fuel cell-based systems hold promise

Kenis, Paul J. A.

49

Extended reaction zone of La0.6Sr0.4Co0.2Fe0.8O3 cathode for solid oxide fuel cell  

SciTech Connect (OSTI)

The oxygen reduction reaction at the cathode of solid oxide fuel cell (SOFC) is a complicated process which involves the interaction of oxygen molecules, electrons, and oxygen ions. Therefore, it can only proceed at locations where gas, electronic conductor, and an oxygen ion conductor meet. Although the extension of the reaction zone beyond the traditional so-called triple-phase-boundary (TPB) is widely accepted for a mixed ionically and electronically conductive cathode, work in this area has yet to reach a consensus on how far the reaction zone can be extended. In this study, anode-supported fuel cells with a variety of LSCF cathode thicknesses were fabricated and tested in two cathode environments, flowing oxygen and flowing air. In flowing oxygen, the cell performance increased with LSCF cathode thickness over the entire range investigated (from 5 to 33 ?m). In flowing air, the cell performance also increased with the LSCF cathode thickness from 5 to 13 ?m, but then remained almost constant with further increase in cathode thickness. In flowing oxygen, since there was no concentration polarization related to oxygen diffusion, the polarization resistance of oxygen reduction decreased with the LSCF cathode thickness because of the increased number of reaction sites. A linear relationship was established between the reciprocal of the polarization resistance and the cathode thickness, which was explained by a model developed for aqueous gas diffusion electrodes.

Lu, Zigui; Hardy, John S.; Templeton, Jared W.; Stevenson, Jeffry W.

2012-01-03T23:59:59.000Z

50

Electrochemical Performance and Stability of the Cathode for Solid Oxide Fuel Cells. I. Cross Validation of Polarization Measurements by Impedance Spectroscopy and Current-Potential Sweep  

SciTech Connect (OSTI)

The aim of this paper is to address three issues in solid oxide fuel cells: (1) cross-validation of the polarization of a single cell measured using both dc and ac approaches, (2) the precise determination of the total areal specific resistance (ASR), and (3) understanding cathode polarization with LSCF cathodes. The ASR of a solid oxide fuel cell is a dynamic property, meaning that it changes with current density. The ASR measured using ac impedance spectroscopy (low frequency interception with real Z´ axis of ac impedance spectrum) matches with that measured from a dc IV sweep (the tangent of dc i-V curve). Due to the dynamic nature of ASR, we found that an ac impedance spectrum measured under open circuit voltage or on a half cell may not represent cathode performance under real operating conditions, particularly at high current density. In this work, the electrode polarization was governed by the cathode activation polarization; the anode contribution was negligible.

Zhou, Xiao Dong; Pederson, Larry R.; Templeton, Jared W.; Stevenson, Jeffry W.

2009-12-09T23:59:59.000Z

51

Soft X-Ray Spectroscopic Study of Dense Strontium-Doped Lanthanum Manganite Cathodes for Solid Oxide Fuel Cell Applications  

SciTech Connect (OSTI)

The evolution of the Mn charge state, chemical composition, and electronic structure of La{sub 0.8}Sr{sub 0.2}MnO{sub 3} (LSMO) cathodes during the catalytic activation of solid oxide fuel cell (SOFC) has been studies using X-ray spectroscopy of as-processed, exposed, and activated dense thin LSMO films. Comparison of O K-edge and Mn L{sub 3,2}-edge X-ray absorption spectra from the different stages of LSMO cathodes revealed that the largest change after the activation occurred in the Mn charge state with little change in the oxygen environment. Core-level X-ray photoemission spectroscopy and Mn L{sub 3} resonant photoemission spectroscopy studies of exposed and as-processed LSMO determined that the SOFC environment (800 C ambient pressure of O{sub 2}) alone results in La deficiency (severest near the surface with Sr doping >0.55) and a stronger Mn{sup 4+} contribution, leading to the increased insulating character of the cathode prior to activation. Meanwhile, O K-edge X-ray absorption measurements support Sr/La enrichment nearer the surface, along with the formation of mixed Sr{sub x}Mn{sub y}O{sub z} and/or passive MnO{sub x} and SrO species.

L Piper; A Preston; S Cho; A DeMasi; J Laverock; K Smith; L Miara; J Davis; S Basu; et al.

2011-12-31T23:59:59.000Z

52

Soft X-Ray Spectroscopic Study of Dense Strontium-Doped Lanthanum Manganite Cathodes for Solid Oxide Fuel Cell Applications  

SciTech Connect (OSTI)

The modification of the Mn charge-state, chemical composition and electronic structure of La0.8Sr0.2MnO3 (LSMO) cathodes for solid oxide fuel cell (SOFC) applications remains an area of interest, due to the poorly understood enhanced catalytic activity (often referred to as the "burn-in" phenomenon) observed after many hours of operation. Using a combination of core-level X-ray photoemission spectroscopy (XPS), X-ray emission/absorption spectroscopy (XES/XAS), resonant inelastic X-ray scattering (RIXS) and resonant photoemission spectroscopy (RPES), we have monitored the evolution of these properties in LSMO at various stages of fabrication and operation. By rapidly quenching and sealing in vacuum, we were able to directly compare the pristine (as-fabricated) LSMO with both "heat-treated" (800°C in air, and no bias) and "burnt-in" (800°C in air, -1 V bias) LSMO cathodes i.e. before and after the activation observed in our electrochemical impendence spectroscopy measurements. Comparison between the O K-edge XAS/XES and Mn L3,2-edge XAS of pristine and “burnt-in” LSMO cathodes revealed a severe change in the oxygen environment along with a reduced Mn2+ presence near the surface following activation. The change in the oxygen environment is attributed to SrxMnyOz formation, along with possible passive SrO and Mn3O4 species. We present evidence from our “heat-treated” samples that SrxMnyOz regions form at elevated temperatures in air before the application of a cathodic bias. Our core-level XPS, Mn L3,2-edge RIXS and Mn L3 RPES studies of “heat-treated” and pristine LSMO determined that SOFC environments result in La-deficiency (severest near the surface) and stronger Mn4+ contribution, leading to the increased insulating character of the cathode prior to activation. The passive Mn2+ species near the surface and increased hole-doping (>0.6) of the LSMO upon exposure to the operating environment are considered responsible for the initially poor performance of the SOFC. Meanwhile, the improved oxygen reduction following the application of a cathodic bias is considered to be due to enhanced bulk oxygen-ion diffusion resulting from the migration of Mn2+ ions towards the LSMO/electrolyte interface and the SrxMnyOz regions facilitating enhanced bulk oxygen reduction reaction kinetics.

Piper, L.F.J.; Preston, Andrew R.H.; Cho, Sang Wan; DeMasi, Alexander; Chen, Bin; Laverock, J.; Smith, K. E.; Miara, Lincoln J.; Davis, Jacob N.; Basu, Soumendra; Pal, Uday B.; Gopalan, Srikanth; Saraf, Laxmikant V.; Kaspar, Tiffany C.; Matsuura, A. Y.; Glans, P.A.; Guo, Jianzhong

2010-12-02T23:59:59.000Z

53

Exploratory fuel-cell research: I. Direct-hydrocarbon polymer-electrolyte fuel cell. II. Mathematical modeling of fuel-cell cathodes  

SciTech Connect (OSTI)

A strong need exists today for more efficient energy-conversion systems. Our reliance on limited fuel resources, such as petroleum for the majority of our energy needs makes it imperative that we utilize these resources as efficiently as possible. Higher-efficiency energy conversion also means less pollution, since less fuel is consumed and less exhaust created for the same energy output. Additionally, for many industrialized nations, such as the United States which must rely on petroleum imports, it is also imperative from a national-security standpoint to reduce the consumption of these precious resources. A substantial reduction of U.S. oil imports would result in a significant reduction of our trade deficit, as well as costly military spending to protect overseas petroleum resources. Therefore, energy-conversion devices which may utilize alternative fuels are also in strong demand. This paper describes research on fuel cells for transportation.

Perry, M.L.; McLarnon, F.R.; Newman, J.S.; Cairns, E.J.

1996-12-01T23:59:59.000Z

54

Prediction of O2 Dissociation Kinetics on LaMnO3-Based Cathode Materials for Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

First-principles and statistical-theory calculations were applied to examine the interactions between oxygen molecules and the (100) surfaces of LaMnO3 and La0.5Sr0.5MnO2.75, one of the most-used cathode materials in solid oxide fuel cells (SOFCs). To predict the rate constants for the interactions between O2 and LaMnO3 or La0.5Sr0.5MnO2.75, potential energy profiles were constructed using the nudged elastic band (NEB) method. Predicted rate constants for the dissociation of adsorbed oxygen species on LaMnO3 (lm) and La0.5Sr0.5MnO2.75 (lsm) can be expressed as kdiss,lm ) 2.35 × 1012 exp(-0.50 eV/RT) s-1 and kdiss,lsm ) 2.15 × 1012 exp(-0.23 eV/RT) s-1, respectively, in the temperature range of 873-1273 K at 1 atm. Because the activation energy for oxygen dissociation on La0.5Sr0.5MnO2.75 (0.23 eV) is much smaller than that on LaMnO3 (0.50 eV), oxygen vacancies greatly enhance O2 dissociation kinetics. The kinetic and mechanistic studies for the interactions at the molecular level are imperative to gaining a fundamental understanding of oxygen reduction kinetics on cathode materials and to providing important insight into the rational design of more catalytically active cathode materials for SOFCs.

Choi, Yongman; Lynch, Matthew E.; Lin, M. C.; Liu, Meilin

2009-04-30T23:59:59.000Z

55

ACTIVE CATHODES FOR SUPER-HIGH POWER DENSITY SOLID OXIDE FUEL CELLS THROUGH SPACE CHARGE EFFECTS  

SciTech Connect (OSTI)

This report summarizes the work done during the sixth quarter of the project. Effort was directed in three areas: (1) Further development of the model on the role of connectivity on ionic conductivity of porous bodies, including the role of grain boundaries and space charge region. (2) Calculation of the effect of space charge and morphology of porous bodies on the effective charge transfer resistance of porous composite cathodes. (3) The investigation of the three electrode system for the measurement of cathodic polarization using amperometric sensors.

Anil V. Virkar

2004-05-17T23:59:59.000Z

56

Study of oxygen reduction mechanism on Ag modified1 Sm1.8Ce0.2CuO4 cathode for solid oxide fuel cell2  

E-Print Network [OSTI]

to oxygen dissociation and diffusion process.26 KEYWORDS: Solid oxide fuel cell; Silver infiltration-time of the cell/stack/module as well as to reduce the cost of the materials. So32 far, many studies have beenStudy of oxygen reduction mechanism on Ag modified1 Sm1.8Ce0.2CuO4 cathode for solid oxide fuel

Paris-Sud XI, Université de

57

Electrochemical Performance and Stability of the Cathode for Solid Oxide Fuel Cells: III. Role of volatile boron species on LSM/YSZ and LSCF  

SciTech Connect (OSTI)

Boron oxide is a key component to tailor the softening temperature and viscosity of the sealing glass for solid oxide fuel cells. The primary concern regarding the use of boron containing sealing glasses is the volatility of boron species, which possibly results in cathode degradation. In this paper, we report the role of volatile boron species on the electrochemical performance of LSM/YSZ and LSCF cathodes at various SOFC operation temperatures. The transport rate of boron, ~ 3.24×10-12 g/cm2•sec was measured at 750°C with air saturated with 2.8% moisture. A reduction in power density was observed in cells with LSM/YSZ cathodes after introduction of the boron source to the cathode air stream. Partial recovery of the power density was observed after the boron source was removed. Results from post-test secondary ion mass spectroscopy (SIMS) analysis the partial recovery in power density correlated with partil removal of the deposited boron by the clean air stream. The presence of boron was also observed in LSCF cathodes by SIMS analysis, however the effect of boron on the electrochemical performance of LSCF cathode was negligible. Coverage of triple phase boundaries in LSM/YSZ was postulated as the cause for the observed reduction in electrochemical performance.

Zhou, Xiao Dong; Templeton, Jared W.; Zhu, Zihua; Chou, Y. S.; Maupin, Gary D.; Lu, Zigui; Brow, R. K.; Stevenson, Jeffry W.

2010-09-02T23:59:59.000Z

58

Fuel cell with internal flow control  

DOE Patents [OSTI]

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

59

Advanced Cathode Catalysts and Supports for PEM Fuel Cells | Department of  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustionImprovement3-- ------------------------------Chapter 39.208-006 AdvanceEnergy This

60

Development of Ultra-low Platinum Alloy Cathode Catalyst for PEM Fuel Cells  

Energy Savers [EERE]

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61

Advanced Cathode Catalysts and Supports for PEM Fuel Cells | Department of  

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

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62

PRELIMINARY IN-SITU X-RAY ABSORPTION FINE STRUCTURE EXAMINATION OF PT/C AND PTCO/C CATHODE CATALYSTS IN AN OPERATIONAL POLYMER ELECTROLYTE FUEL CELL  

SciTech Connect (OSTI)

State-of-the-art polymer electrolyte fuel cells require a conditioning period to reach optimized cell performance. There is insuffi cient understanding about the behavior of catalysts during this period, especially with regard to the changing environment of the cathode electrocatalyst, which is typically Pt nanoparticles supported on high surface area Vulcan XC-72 carbon (Pt/C). The purpose of this research was to record preliminary observations of the changing environment during the conditioning phase using X-Ray Absorption Fine Structure (XAFS) spectroscopy. XAFS was recorded for a Pt/C cathode at the Pt L3-edge and a PtCo/C cathode at both the Pt L3-edge and Co K-edge. Using precision machined graphite cell-blocks, both transmission and fl uorescence data were recorded at Sector 12-BM-B of Argonne National Laboratory’s Advanced Photon Source. The fl uorescence and transmission edge steps allow for a working description of the changing electrocatalyst environment, especially water concentration, at the anode and cathode as functions of operating parameters. These features are discussed in the context of how future analysis may correlate with potential, current and changing apparent thickness of the membrane electrode assembly through loss of catalyst materials (anode, cathode, carbon support). Such direct knowledge of the effect of the conditioning protocol on the electrocatalyst may lead to better catalyst design. In turn, this may lead to minimizing, or even eliminating, the conditioning period.

Phelan, B.T.; Myers, D.J.; Smith, M.C.

2009-01-01T23:59:59.000Z

63

The Orientation Distributions of Lines, Surfaces, and Interfaces Around Three-Phase Boundaries in Solid Oxide Fuel Cell Cathodes  

SciTech Connect (OSTI)

Three-dimensional electron backscatter diffraction was used to measure the crystallographic distribution of the electrochemically relevant triple phase boundary lines and surfaces near them in SOFC cathodes made up of a porous mixture of yttria-stabilized zirconia and lanthanum strontium manganese oxide, both before and after mild electrochemical loading. All distributions were observed to be nearly isotropic, but non-random textures above the detection threshold were observed. The distributions differ between the two cells, as do the phase fractions and the electrochemical history. The different distributions are interpreted as evidence that steady-state distributions vary locally with phase fractions or that they evolve during the initial operation of the fuel cell. The rates at which triple lines, pore surfaces, and interface boundaries in the porous mixture approach a steady-state value appear to decrease with the average amount of mass transport required to reorient that specific feature. This work provides initial insights into the crystallography of interfaces in a multiphase ceramic material.

Dillon, Shen; Helmick, Lam; Miller, Herbert M.; Johnson, Christopher; Wilson, Lane; Gemmen, Randall; Petrova, Rumyana; Barmak, Katayun; Gerdes, Kirk; Rohrer, Gregory S.; Salvador, Paul A.

2011-11-01T23:59:59.000Z

64

Advanced Cathode Catalysts and Supports for PEM Fuel Cells | Department of  

Office of Environmental Management (EM)

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65

Battery Cathodes > Batteries & Fuel Cells > Research > The Energy Materials  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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66

Better Ham & Cheese: Enhanced Anodes and Cathodes for Fuel Cells > Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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67

Methanol-tolerant cathode catalyst composite for direct methanol fuel cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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68

Hard X-ray Fluorescence Measurements of Heteroepitaxial Solid Oxide Fuel Cell Cathode Materials  

SciTech Connect (OSTI)

Commonly, SOFCs are operated at high temperatures (above 800°C). At these temperatures expensive housing is needed to contain an operating stack as well as coatings to contain the oxidation of the metallic interconnects. Lowering the temperature of an operating device would allow for more conventional materials to be used, thus lowering overall cost. Understanding the surface chemical states of cations in the surface of the SOFC cathode is vital to designing a system that will perform well at lower temperatures. The samples studied were grown by pulsed laser deposition (PLD) at the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory (PNNL). 20% strontium doped lanthanum manganite (LSM-20) was grown on YSZ and NGO (neodymium gallate). The films on YSZ have a fiber texture. LSM-20 on NGO is heteroepitaxial. Lanthanum strontium cobalt ferrite (LSCF-6428) films were grown on LAO and YSZ with a GDC barrier layer. Total X-ray Reflection Fluorescence (TXRF) was used to depth profile the samples. In a typical experiment, the angle of the incident beam is varied though the critical angle. Below the critical angle, the x-ray decays as an evanescent wave and will only penetrate the top few nanometers. TXRF experiments done on LSM films have suggested strontium segregates to the surface and form strontium enriched nanoparticles (1). It should be pointed out that past studies have focused on 30% strontium A-site doping, but this project uses 20% strontium doped lanthanum manganite. XANES and EXAFS data were taken as a function of incoming angle to probe composition as a function of depth. XANES spectra can be difficult to analyze fully. For other materials density functional theory calculations compared to near edge measurements have been a good way to understand the 3d valence electrons (2).

Davis, Jacob N.; Miara, Lincoln J.; Saraf, Laxmikant V.; Kaspar, Tiffany C.; Gopalan, Srikanth; Pal, Uday B.; Woicik, Joseph C.; Basu, Soumendra N.; Ludwig, Karl F.

2012-12-01T23:59:59.000Z

69

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

70

A calorimetric analysis of a polymer electrolyte fuel cell and the production of H2O2 at the cathode  

E-Print Network [OSTI]

fuel cell that is operated on hydrogen and oxygen at 50 °C and 1 bar. The cell had a SolviCore Catalyst31.08.2009 1 A calorimetric analysis of a polymer electrolyte fuel cell and the production of H2O2 1. INTRODUCTION The energy that is dissipated as heat in fuel cells is interesting for several

Kjelstrup, Signe

71

E-Print Network 3.0 - air-cathode microbial fuel Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Bioelectronics 30 (2011) 267271 Summary: .elsevier.comlocatebios Air-cathode structure optimization in separator-coupled microbial fuel cells Xiaoyuan Zhanga , Haotian... :...

72

A Parametric Study of Cathode Catalyst Layer Structural Parameters on the Performance of a PEM Fuel Cell  

E-Print Network [OSTI]

exchange membrane fuel cell (PEMFC) and how changes in its structural parameters affect performance. These results give useful guidelines for manufactures of PEMFC catalyst layers. Keywords: PEM fuel cell In a proton exchange membrane fuel cell (or PEMFC), electrical energy is generated directly through

Stockie, John

73

A MULTI-LENGTH SCALE APPROACH TO CORRELATING SOLID OXIDE FUEL CELL POROUS CATHODE MICROSTRUCTURE TO ELECTROCHEMICAL PERFORMANCE  

E-Print Network [OSTI]

........................................................................................................27 3 COMPREHENSIVE QUANTIFICATION OF POROUS LSCF CATHODE MICROSTRUCTURE AND ELECTROCHEMICAL IMPEDANCE

Florida, University of

74

Microbial fuel cells  

DOE Patents [OSTI]

A microbial fuel cell includes an anode compartment with an anode and an anode biocatalyst and a cathode compartment with a cathode and a cathode biocatalyst, with a membrane positioned between the anode compartment and the cathode compartment, and an electrical pathway between the anode and the cathode. The anode biocatalyst is capable of catalyzing oxidation of an organic substance, and the cathode biocatalyst is capable of catalyzing reduction of an inorganic substance. The reduced organic substance can form a precipitate, thereby removing the inorganic substance from solution. In some cases, the anode biocatalyst is capable of catalyzing oxidation of an inorganic substance, and the cathode biocatalyst is capable of catalyzing reduction of an organic or inorganic substance.

Nealson, Kenneth H; Pirbazari, Massoud; Hsu, Lewis

2013-04-09T23:59:59.000Z

75

Surface Wettability Impact on Water Management in PEM Fuel Cell.  

E-Print Network [OSTI]

??Excessive water formation inside the polymer electrolyte membrane (PEM) fuel cell’s structures leads to the flooding of the cathode gas diffusion layer (GDL) and cathode… (more)

Al Shakhshir, Saher

2012-01-01T23:59:59.000Z

76

Optimal Shape Design for Polymer Electrolyte Membrane Fuel Cell Cathode Air Channel: Modelling, Computational and Mathematical Analysis .  

E-Print Network [OSTI]

??Hydrogen fuel cells are devices used to generate electricity from the electrochemical reaction between air and hydrogen gas. An attractive advantage of these devices is… (more)

Al-Smail, Jamal Hussain

2012-01-01T23:59:59.000Z

77

New insights in the polarization resistance of anode-supported solid oxide fuel cells with La0.6Sr0.4Co0.2Fe0.8O3 cathodes  

SciTech Connect (OSTI)

In this study, the polarization resistance of the La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) solid oxide fuel cell (SOFC) cathode was investigated by I-V sweep and electrochemcial impedance spectroscopy under a series of dc bias voltages and cathode environments (i.e. stagnant air, flowing air, and flowing oxygen) at temperatures from 550 to 750 °C. In flowing oxygen, the polarization resistance of the fuel cell decreased considerably with the applied current density. A linear relationship was observed between the ohmic-free over-potential and the logarithm of the current density of the fuel cell at all the measuring temperatures. In stagnant or flowing air, a new arc related to the molecular oxygen diffusion in the pores of the cathode was identified at high temperatures and high current densities. The magnitude of this arc increased with the applied current density due to the decreased oxygen partial pressure at the interface of the cathode and the electrolyte. It is found that the performance of the fuel cell in air is mainly determined by the oxygen diffusion process. Elimination of this process by flowing oxygen to the cathode improved the cell performance significantly. At 750 °C, for a fuel cell with a laser-deposited Sm0.2Ce0.8O1.9 (SDC) interlayer, an extraordinarily high power density of 2.6 W cm-2 at 0.7 V was achieved in flowing oxygen, as a result of reduced ohmic and polarization resistance of the fuel cell, which were 0.06 ? cm2 and 0.03 ? cm2, respectively. The results indicate that optimization of the microstructure of the LSCF cathode or adoption of a new cell design which can mitigate the diffusion problem in the cathode might enhance cell performance significantly.

Lu, Zigui; Hardy, John S.; Templeton, Jared W.; Stevenson, Jeffry W.

2011-01-01T23:59:59.000Z

78

Cathode Connector For Aluminum Low Temperature Smelting Cell  

DOE Patents [OSTI]

Cathode connector means for low temperature aluminum smelting cell for connecting titanium diboride cathode or the like to bus bars.

Brown, Craig W. (Seattle, WA); Beck, Theodore R. (Seattle, WA); Frizzle, Patrick B. (Seattle, WA)

2003-07-16T23:59:59.000Z

79

Use of Pyrolyzed Iron Ethylenediaminetetraacetic Acid Modified Activated Carbon as Air-Cathode Catalyst in Microbial Fuel Cells  

E-Print Network [OSTI]

. Logan*,, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China Department of Civil and Environmental better than Pt-catalyzed cathodes. After 4.5 months of operation, the maximum power density of Pt cathode

80

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 for further treatment and possible recycling as a fresh blanket or 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 is disposed about the outer anodic dissolution baskets. Uranium is transported from the anode baskets and deposited 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 deposition rate enhanced by increasing the electrode area and reducing the anode-cathode spacing. Collection efficiency is enhanced by trapping and recovery of uranium dendrites scrapped off of the cylindrical cathodes which may be greater in number than two.

Gay, Eddie C. (Park Forest, IL); Miller, William E. (Naperville, IL); Laidler, James J. (Burr Ridge, IL)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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.


81

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 for further treatment and possible recycling as a fresh blanket or 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 is disposed about the outer anodic dissolution baskets. Uranium is transported from the anode baskets and deposited 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 deposition rate enhanced by increasing the electrode area and reducing the anode-cathode spacing. Collection efficiency is enhanced by trapping and recovery of uranium dendrites scrapped off of the cylindrical cathodes which may be greater in number than two. 12 figs.

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

1997-07-22T23:59:59.000Z

82

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

83

Corrosion free phosphoric acid fuel cell  

DOE Patents [OSTI]

A phosphoric acid fuel cell with an electrolyte fuel system which supplies electrolyte via a wick disposed adjacent a cathode to an absorbent matrix which transports the electrolyte to portions of the cathode and an anode which overlaps the cathode on all sides to prevent corrosion within the cell.

Wright, Maynard K. (Bethel Park, PA)

1990-01-01T23:59:59.000Z

84

Platinum-Alloy Cathode Catalyst Degradation in Proton Exchange Membrane Fuel Cells: Nanometer-Scale Compositional and Morphological Changes  

E-Print Network [OSTI]

Electrochemical measurements showed an ?75% Pt surface area loss and an ?40% specific activity loss for a membrane electrode assembly (MEA) cathode with acid-treated “Pt[subscript 3]Co ” catalyst particles in a H[subscript ...

Chen, Shuo

85

Fuel Cell Stack Components BipolarPlate  

E-Print Network [OSTI]

Fuel Cell Stack Components Fuel Processor BipolarPlate Cathode+ Anode- Electrolyte H+ H+ HYDROGEN · Low-Platinum and Platinum-Free Catalysts for Oxygen Reduction at PEM Fuel Cell Cathodes · Low-Platinum-Loading Catalysts for Fuel Cells · Scale-Up of Carbon/Carbon Composite Bipolar Plates #12;Stack Component Projects

86

Fuel cell gas management system  

DOE Patents [OSTI]

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

87

Co-Pt core-shell nanostructured catalyst prepared by selective chemical vapor pulse deposition of Pt on Co as a cathode in polymer electrolyte fuel cells  

SciTech Connect (OSTI)

A new type of PtCo/C catalyst for use as a cathode in polymer electrolyte fuel cells was prepared by selective chemical vapor pulse deposition (CVPD) of Pt on the surface of Co. The activity of the prepared catalyst for oxygen reduction was higher than that of a catalyst prepared by sequential impregnation (IMP) with the two metallic components. This catalytic activity difference occurs because the former catalyst has smaller Pt crystallites that produce stronger Pt-Co interactions and have a larger Pt surface area. Consequently, the CVPD catalyst has a great number of Co particles that are in close contact with the added Pt. The Pt surface was also electronically modified by interactions with Co, which were stronger in the CVPD catalyst than in the IMP catalyst, as indicated by X-ray diffraction, X-ray photoemission spectroscopy, and cyclic voltammetry measurements of the catalysts.

Seo, Sang-Joon; Chung, Ho-Kyoon [SKKU Advanced Institute of Nanotechnology (SAINT) and Center for Human Interface Nanotechnology (HINT), Sungkyunkwan University, Suwon, Gyeonggi 440-746 (Korea, Republic of); Yoo, Ji-Beom [SKKU Advanced Institute of Nanotechnology (SAINT) and Center for Human Interface Nanotechnology (HINT), Sungkyunkwan University, Suwon, Gyeonggi 440-746, Korea and School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Gyeonggi 440-746 (Korea, Republic of); Chae, Heeyeop; Seo, Seung-Woo; Min Cho, Sung, E-mail: sungmcho@skku.edu [School of Chemical Engineering, Sungkyunkwan University, Suwon, Gyeonggi 440-746 (Korea, Republic of)

2014-01-15T23:59:59.000Z

88

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

89

Cells having cathodes containing polycarbon disulfide materials  

DOE Patents [OSTI]

The present invention relates to an electric current producing cell which contains an anode, a cathode having as a cathode-active material one or more carbon-sulfur compounds of the formula (CS.sub.x).sub.n, in which x takes values from 1.2 to 2.3 and n is greater or equal to 2, and where the redox process does not involve polymerization and de-polymerization by forming and breaking S--S bonds in the polymer backbone. The cell also contains an electrolyte which is chemically inert with respect to the anode and the cathode.

Okamoto, Yoshi (Fort Lee, NJ); Skotheim, Terje A. (Shoreham, NY); Lee, Hung S. (Rocky Point, NY)

1995-08-15T23:59:59.000Z

90

OPTIMIZATION OF THE CATHODE LONG-TERM STABILITY IN MOLTEN CARBONATE FUEL CELLS: EXPERIMENTAL STUDY AND MATHEMATICAL MODELING  

SciTech Connect (OSTI)

SS 304 was encapsulated with thin layers of Co-Ni by an electroless deposition process. The corrosion behavior of SS304 and Co-Ni-SS304 was investigated in molten carbonate under cathode gas atmosphere with electrochemical and surface characterization tools. Surface modification of SS304 reduced the dissolution of chromium and nickel into the molten carbonate melt. Composition of the corrosion scale formed in case of Co-Ni-SS304 is different from SS304 and shows the presence of Co and Ni oxides while the latter shows the presence of lithium ferrite. Polarization resistance for oxygen reduction reaction and conductivity of corrosion values for the corrosion scales were obtained using impedance analysis and current-potential plots. The results indicated lower polarization resistance for oxygen reduction reaction in the case of Co-Ni-SS304 when compared to SS304. Also, the conductivity of the corrosion scales was considerably higher in case of Co-Ni-SS304 than the SS304. This study shows that modifying the current collector surface with Co-Ni coatings leads to the formation of oxide scales with improved barrier properties and electronic conductivity.

Dr. Ralph E. White

2001-03-31T23:59:59.000Z

91

Palladium-based electrocatalysts and fuel cells employing such electrocatalysts  

DOE Patents [OSTI]

A direct organic fuel cell includes a fluid fuel comprising formic acid, an anode having an electrocatalyst comprising palladium nanoparticles, a fluid oxidant, a cathode electrically connected to the anode, and an electrolyte interposed between the anode and the cathode.

Masel; Richard I. (Champaign, IL), Zhu; Yimin (Urbana, IL), Larsen; Robert T. (Champaign, IL)

2010-08-31T23:59:59.000Z

92

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

DOE Patents [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

93

Carbon fuel cells with carbon corrosion suppression  

DOE Patents [OSTI]

An electrochemical cell apparatus that can operate as either a fuel cell or a battery includes a cathode compartment, an anode compartment operatively connected to the cathode compartment, and a carbon fuel cell section connected to the anode compartment and the cathode compartment. An effusion plate is operatively positioned adjacent the anode compartment or the cathode compartment. The effusion plate allows passage of carbon dioxide. Carbon dioxide exhaust channels are operatively positioned in the electrochemical cell to direct the carbon dioxide from the electrochemical cell.

Cooper, John F. (Oakland, CA)

2012-04-10T23:59:59.000Z

94

Long-term cathode performance and the microbial communities that develop in microbial fuel cells fed different fermentation endproducts  

E-Print Network [OSTI]

theoretical yield by dark fermentation is 4 mol of hydrogen (33%) when two moles of acetate are produced fed different fermentation endproducts Patrick D. Kiely, Geoffrey Rader, John M. Regan, Bruce E. Logan cells were operated for more than 1 year with individual endproducts of lignocellulose fermentation

95

Low temperature aluminum reduction cell using hollow cathode  

DOE Patents [OSTI]

A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte. A plurality of non-consumable anodes are disposed substantially vertically in the electrolyte along with a plurality of monolithic hollow cathodes. Each cathode has a top and bottom and the cathodes are disposed vertically in the electrolyte and the anodes and the cathodes are arranged in alternating relationship. Each of the cathodes is comprised of a first side facing a first opposing anode and a second side facing a second opposing anode. The first and second sides are joined by ends to form a reservoir in the hollow cathode for collecting aluminum therein deposited at the cathode.

Brown, Craig W. (Seattle, WA); Frizzle, Patrick B. (Seattle, WA)

2002-08-20T23:59:59.000Z

96

Cathode for an electrochemical cell  

DOE Patents [OSTI]

Described is a thin-film battery, especially a thin-film microbattery, and a method for making same having application as a backup or primary integrated power source for electronic devices. The battery includes a novel electrolyte which is electrochemically stable and does not react with the lithium anode and a novel vanadium oxide cathode. Configured as a microbattery, the battery can be fabricated directly onto a semiconductor chip, onto the semiconductor die or onto any portion of the chip carrier. The battery can be fabricated to any specified size or shape to meet the requirements of a particular application. The battery is fabricated of solid state materials and is capable of operation between -15.degree. C. and 150.degree. C.

Bates, John B. (Oak Ridge, TN); Dudney, Nancy J. (Knoxville, TN); Gruzalski, Greg R. (Oak Ridge, TN); Luck, Christopher F. (Knoxville, TN)

2001-01-01T23:59:59.000Z

97

Separator plate for a fuel cell  

DOE Patents [OSTI]

A separator plate is described for a fuel cell comprising an anode current collector, a cathode current collector and a main plate, the main plate disposed between the anode current collector and the cathode current collector. The anode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the anode side of the separator plate and the cathode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the cathode side of the separator plate. In this manner, the number of components required to manufacture and assemble a fuel cell stack is reduced. 9 figs.

Petri, R.J.; Meek, J.; Bachta, R.P.; Marianowski, L.G.

1996-04-02T23:59:59.000Z

98

Separator plate for a fuel cell  

DOE Patents [OSTI]

A separator plate for a fuel cell comprising an anode current collector, a cathode current collector and a main plate, the main plate disposed between the anode current collector and the cathode current collector. The anode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the anode side of the separator plate and the cathode current collector forms a flattened peripheral wet seal structure and manifold wet seal structure on the cathode side of the separator plate. In this manner, the number of components required to manufacture and assemble a fuel cell stack is reduced.

Petri, Randy J. (Crete, IL); Meek, John (Downers Grove, IL); Bachta, Robert P. (Chicago, IL); Marianowski, Leonard G. (Mount Prospect, IL)

1996-01-01T23:59:59.000Z

99

Nanostructured thin films for solid oxide fuel cells  

E-Print Network [OSTI]

The goals of this work were to synthesize high performance perovskite based thin film solid oxide fuel cell (TF-SOFC) cathodes by pulsed laser deposition (PLD), to study the structural, electrical and electrochemical properties of these cathodes...

Yoon, Jongsik

2009-05-15T23:59:59.000Z

100

Vehicle Technologies Office Merit Review 2014: High Energy Novel Cathode / Alloy Automotive Cell  

Broader source: Energy.gov [DOE]

Presentation given by 3M at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high energy novel cathode / alloy...

Note: This page contains sample records for the topic "fuel cell cathode" 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

Rapidly refuelable fuel cell  

DOE Patents [OSTI]

A rapidly refuelable dual cell of an electrochemical type is described wherein a single anode cooperates with two cathodes and wherein the anode has a fixed position and the cathodes are urged toward opposite faces of the anodes at constant and uniform force. The associated cathodes are automatically retractable to permit the consumed anode remains to be removed from the housing and a new anode inserted between the two cathodes.

Joy, R.W.

1982-09-20T23:59:59.000Z

102

High Energy Novel Cathode / Alloy Automotive Cell  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

103

Polymer Electrolyte Fuel Cell Lifetime Limitations: The Role...  

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

More Documents & Publications Non-Platinum Bimetallic Cathode Electrocatalysts Testing Oxygen Reduction Reaction Activity with the Rotating Disc Electrode Technique DOE Fuel Cell...

104

Fuel Cell R&D Pre-Solicitiation Workshop  

Broader source: Energy.gov (indexed) [DOE]

of 20-40% depending on stage of development * Potential Topics of Research: * Improved Fuel Cell Membranes * Water Transport Within the Stack * Advanced Cathode Catalysts and...

105

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

106

Annular feed air breathing fuel cell stack  

DOE Patents [OSTI]

A stack of polymer electrolyte fuel cells is formed from a plurality of unit cells where each unit cell includes fuel cell components defining a periphery and distributed along a common axis, where the fuel cell components include a polymer electrolyte membrane, an anode and a cathode contacting opposite sides of the membrane, and fuel and oxygen flow fields contacting the anode and the cathode, respectively, wherein the components define an annular region therethrough along the axis. A fuel distribution manifold within the annular region is connected to deliver fuel to the fuel flow field in each of the unit cells. In a particular embodiment, a single bolt through the annular region clamps the unit cells together. In another embodiment, separator plates between individual unit cells have an extended radial dimension to function as cooling fins for maintaining the operating temperature of the fuel cell stack.

Wilson, Mahlon S. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

107

Fuel-cell engine stream conditioning system  

DOE Patents [OSTI]

A stream conditioning system for a fuel cell gas management system or fuel cell engine. The stream conditioning system manages species potential in at least one fuel cell reactant stream. A species transfer device is located in the path of at least one reactant stream of a fuel cell's inlet or outlet, which transfer device conditions that stream to improve the efficiency of the fuel cell. The species transfer device incorporates an exchange media and a sorbent. The fuel cell gas management system can include a cathode loop with the stream conditioning system 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 related 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)

2002-01-01T23:59:59.000Z

108

Interconnection of bundled solid oxide fuel cells  

DOE Patents [OSTI]

A system and method for electrically interconnecting a plurality of fuel cells to provide dense packing of the fuel cells. Each one of the plurality of fuel cells has a plurality of discrete electrical connection points along an outer surface. Electrical connections are made directly between the discrete electrical connection points of adjacent fuel cells so that the fuel cells can be packed more densely. Fuel cells have at least one outer electrode and at least one discrete interconnection to an inner electrode, wherein the outer electrode is one of a cathode and and anode and wherein the inner electrode is the other of the cathode and the anode. In tubular solid oxide fuel cells the discrete electrical connection points are spaced along the length of the fuel cell.

Brown, Michael; Bessette, II, Norman F; Litka, Anthony F; Schmidt, Douglas S

2014-01-14T23:59:59.000Z

109

*sja@iet.aau.dkwww.iet.aau.dk Development of a 400 W High Temperature PEM Fuel Cell Power Pack : Fuel Cell Stack Test  

E-Print Network [OSTI]

supplied with pure hydrogen and is designed for cathode air cooling, which simplifies the system blowers for cathode air supply and cooling. "Simple and reliable HTPEM fuel cell system with cathode air significantly. The experiences obtained operating the system are, that the cathode air cooling efficiently cools

Berning, Torsten

110

Catalytic membranes for fuel cells  

DOE Patents [OSTI]

A fuel cell of the present invention comprises a cathode and an anode, one or both of the anode and the cathode including a catalyst comprising a bundle of longitudinally aligned graphitic carbon nanotubes including a catalytically active transition metal incorporated longitudinally and atomically distributed throughout the graphitic carbon walls of said nanotubes. The nanotubes also include nitrogen atoms and/or ions chemically bonded to the graphitic carbon and to the transition metal. Preferably, the transition metal comprises at least one metal selected from the group consisting of Fe, Co, Ni, Mn, and Cr.

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

2011-04-19T23:59:59.000Z

111

PEM fuel cell monitoring system  

DOE Patents [OSTI]

Method and apparatus for monitoring the performance of H.sub.2 --O.sub.2 PEM fuel cells. Outputs from a cell/stack voltage monitor and a cathode exhaust gas H.sub.2 sensor are corrected for stack operating conditions, and then compared to predetermined levels of acceptability. If certain unacceptable conditions coexist, an operator is alerted and/or corrective measures are automatically undertaken.

Meltser, Mark Alexander (Pittsford, NY); Grot, Stephen Andreas (West Henrietta, NY)

1998-01-01T23:59:59.000Z

112

PEM fuel cell monitoring system  

DOE Patents [OSTI]

Method and apparatus are disclosed for monitoring the performance of H{sub 2}--O{sub 2} PEM fuel cells. Outputs from a cell/stack voltage monitor and a cathode exhaust gas H{sub 2} sensor are corrected for stack operating conditions, and then compared to predetermined levels of acceptability. If certain unacceptable conditions coexist, an operator is alerted and/or corrective measures are automatically undertaken. 2 figs.

Meltser, M.A.; Grot, S.A.

1998-06-09T23:59:59.000Z

113

Fuel cell-fuel cell hybrid system  

DOE Patents [OSTI]

A device for converting chemical energy to electricity is provided, the device comprising a high temperature fuel cell with the ability for partially oxidizing and completely reforming fuel, and a low temperature fuel cell juxtaposed to said high temperature fuel cell so as to utilize remaining reformed fuel from the high temperature fuel cell. Also provided is a method for producing electricity comprising directing fuel to a first fuel cell, completely oxidizing a first portion of the fuel and partially oxidizing a second portion of the fuel, directing the second fuel portion to a second fuel cell, allowing the first fuel cell to utilize the first portion of the fuel to produce electricity; and allowing the second fuel cell to utilize the second portion of the fuel to produce electricity.

Geisbrecht, Rodney A.; Williams, Mark C.

2003-09-23T23:59:59.000Z

114

Intermediate Temperature Solid Oxide Fuel Cell Development  

SciTech Connect (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

115

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

Research Institute 1990 Fuel Cell Status," Proceedings ofMiller, "Introduction: Fuel-Cell-Powered Vehicle DevelopmentPrograms," presented at Fuel Cells for Transportation,

Delucchi, Mark

1992-01-01T23:59:59.000Z

116

Design and Evaluation of Novel High Capacity Cathode Materials...  

Broader source: Energy.gov (indexed) [DOE]

and Evaluation of Novel High Capacity Cathode Materials Design and Evaluation of Novel High Capacity Cathode Materials 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

117

Additives and Cathode Materials for High-Energy Lithium Sulfur...  

Broader source: Energy.gov (indexed) [DOE]

Additives and Cathode Materials for High-Energy Lithium Sulfur Batteries Additives and Cathode Materials for High-Energy Lithium Sulfur Batteries 2013 DOE Hydrogen and Fuel Cells...

118

Electrochemical Performance and Stability of the Cathode for...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

total areal specific resistance (ASR), and (3) understanding cathode polarization with LSCF cathodes. The ASR of a solid oxide fuel cell is a dynamic property, meaning that it...

119

Fuel Cell Projects Kickoff Meeting February 13, 2007  

E-Print Network [OSTI]

:40 Aligned Carbon Nanotube-Based MEA and PEMFC D-J Liu, ANL 4:00 Light Weight Low Cost PEM Fuel Cell Stacks J in PEM Fuel Cells: Advanced Modeling, Material Selection, testing, and Design Characterization V. Cole Performance Cathode Supports for PEM Fuel Cells Y. Wang, PNNL 3:10 Break #12;Innovative Fuel Cell Concepts 3

120

Project Sponsors:National Fuel Cell Research Center  

E-Print Network [OSTI]

Project Sponsors:National Fuel Cell Research Center www.nfcrc.uci.edu RESULTS · PEM fuel cell the results of subjecting a hydrogen-anode, air-breathing cathode Proton Exchange Membrane (PEM) fuel cell., and Samuelsen, G. S. (2003). "Experimental Evaluation and Computer Simulation of an Air-Breathing PEM Fuel Cell

Mease, Kenneth D.

Note: This page contains sample records for the topic "fuel cell cathode" 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

Annular feed air breathing fuel cell stack  

DOE Patents [OSTI]

A stack of polymer electrolyte fuel cells is formed from a plurality of unit cells where each unit cell includes fuel cell components defining a periphery and distributed along a common axis, where the fuel cell components include a polymer electrolyte membrane, an anode and a cathode contacting opposite sides of the membrane, and fuel and oxygen flow fields contacting the anode and the cathode, respectively, wherein the components define an annular region therethrough along the axis. A fuel distribution manifold within the annular region is connected to deliver fuel to the fuel flow field in each of the unit cells. The fuel distribution manifold is formed from a hydrophilic-like material to redistribute water produced by fuel and oxygen reacting at the cathode. In a particular embodiment, a single bolt through the annular region clamps the unit cells together. In another embodiment, separator plates between individual unit cells have an extended radial dimension to function as cooling fins for maintaining the operating temperature of the fuel cell stack.

Wilson, Mahlon S. (Los Alamos, NM); Neutzler, Jay K. (Peoria, AZ)

1997-01-01T23:59:59.000Z

122

Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibilityFieldMinds"OfficeTourFrom3, 2015 7:00FuelFuelFuel

123

Fuel Cell Technologies Overview: 2011 Fuel Cell Seminar | Department...  

Broader source: Energy.gov (indexed) [DOE]

Fuel Cell Technologies Overview: 2011 Fuel Cell Seminar Fuel Cell Technologies Overview: 2011 Fuel Cell Seminar Presentation by Sunita Satyapal at the Fuel Cell Seminar on November...

124

Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities...  

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

Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities Presentation covers stationary fuel cells...

125

Formic acid fuel cells and catalysts  

DOE Patents [OSTI]

An exemplary fuel cell of the invention includes a formic acid fuel solution in communication with an anode (12, 134), an oxidizer in communication with a cathode (16, 135) electrically linked to the anode, and an anode catalyst that includes Pd. An exemplary formic acid fuel cell membrane electrode assembly (130) includes a proton-conducting membrane (131) having opposing first (132) and second surfaces (133), a cathode catalyst on the second membrane surface, and an anode catalyst including Pd on the first surface.

Masel, Richard I.; Larsen, Robert; Ha, Su Yun

2010-06-22T23:59:59.000Z

126

Using a Quasipotential Transformation for Modeling Diffusion Media in Polymer-Electrolyte Fuel Cells  

E-Print Network [OSTI]

of Performance of PEM Fuel Cells with Conventional andLayers of the Cathode of a PEM Fuel Cell , Journal of thea Microporous Sublayer for PEM Fuel Cells , Journal of Power

Weber, Adam Z.

2008-01-01T23:59:59.000Z

127

Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickr Flickr Editor's note:Computing | ArgonnechallengingFryFuel

128

Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibilityFieldMinds"OfficeTourFrom3, 2015

129

Effects of Chrome Contamination on the Performance of La0.6Sr0.4Co0.2Fe0.8O­3 Cathode Used in Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

Chrome poisoning effects of various Cr-containing metal sources on the electrochemical performance of the La0.6Sr0.4Co0.2Fe0.8O­3 (LSCF6428) cathode have been investigated. It was found that chromia-forming metals caused significant fade in power density due to the chrome poisoning, while alumina-forming alloys exhibited no influence on the cell degradation. This degradation caused by the chrome poisoning was accelerated at higher operating temperatures. Microstructural analysis conducted on the cells tested with chromia-formers exhibited the formation of a strontium chromate phase in the entire cathode, leading to the homogeneous distribution of Cr in the cathode. Although the Mn-containing chromia former such as Crofer22 formed a continuous layer of the Cr-Mn oxide scale on the mesh surface, it was not effective enough to prevent Cr poisoning of the cathode. In contrast, alumina-formers such as Haynes214 and Kanthal formed a continuous layer of the alumina scale, resulting in no Cr contamination in the LSCF cathode.

Kim, Jin Yong Y.; Sprenkle, Vince L.; Canfield, Nathan L.; Meinhardt, Kerry D.; Chick, Lawrence A.

2006-04-01T23:59:59.000Z

130

Once through molten carbonate fuel cell system  

SciTech Connect (OSTI)

This patent describes a fuel cell system. It comprises: a plurality of fuel cells connected electrically through a load, each cell comprising a cathode electrode, an anode electrode, an electrolyte disposed therebetween, a cathode chamber, and an anode chamber; an autothermal reformer for partial oxidation and steam reforming reactions; means for introducing fuel wherein the fuel enters the system through the autothermal reformer; means for delivering the gases from the autothermal reformer to the anode chamber; means for delivering the gases from a heat recovery means to a burner; means for introducing pre-heated air, the air being a source of oxygen and nitrogen for the system, to the burner wherein excess fuel is burned; means for delivering the resulting gases to the cathode chamber; means for delivering the effluent gases from the cathode chamber to the autothermal reformer; and means for exhausting excess gases from the system. The water produced in the anode chamber and the excess oxygen in the cathode chamber are utilized in the autothermal reformer for the partial oxidation and steam reformation reactions.

Wertheim, R.J.

1990-02-20T23:59:59.000Z

131

In situ synchrotron x-ray studies of dense thin-film strontium-doped lanthanum manganite solid oxide fuel cell cathodes.  

SciTech Connect (OSTI)

Using a model cathode-electrolyte system composed of epitaxial thin-films of La{sub 1-x}Sr{sub x}MnO{sub 3-{delta}} (LSM) on single crystal yttria-stabilized zirconia (YSZ), we investigated changes in the cation concentration profile in the LSM during heating and under applied potential using grazing incidence x-rays. Pulsed laser deposition (PLD) was used to grow epitaxial LSM(011) on YSZ(111). At room temperature, we find that Sr segregates to form Sr enriched nanoparticles and upon heating the sample to 700 C, Sr is slowly reincorporated into the film. We also find different amounts of Sr segregation as the X-ray beam is moved across the sample. The variation in the amount of Sr segregation is greater on the sample that has been subject to 72 hours of applied potential, suggesting that the electrochemistry plays a role in the Sr segregation.

Chang, K. C.; Ingram, B.; Kavaipatti, B.; Yildiz, B.; Hennessy, D.; Salvador, P.; Leyarovski, N.; You, H.; Carnegie Mellon Univ.; Massachusetts Inst. of Tech.

2009-01-01T23:59:59.000Z

132

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

the membrane for a PEM fuel cell would cost $5/ft (1990$) inmass-produced PEM fuel cell could cost $10/kW or less. Totalparameter for PEM fuel cells: thinner membranes cost less

Delucchi, Mark

1992-01-01T23:59:59.000Z

133

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

$ b materials cost, % a Fuel cell stack cost only. Includesof the cost of fuel-cell stacks, 1990$° Cost item GE Swan cAnnual maintenance cost of fuel cell stack and auxiliaries (

Delucchi, Mark

1992-01-01T23:59:59.000Z

134

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

Hydrogen Fuel Cell Vehicles UCD-ITS-RR-92-14 September bycost than both. Solar-hydrogen fuel- cell vehicles would becost than both. Solar-hydrogen fuel- cell vehicles would be

Delucchi, Mark

1992-01-01T23:59:59.000Z

135

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

Hydrogen Fuel Cell Vehicles UCD-ITS-RR-92-14 September byet al. , 1988,1989 HYDROGEN FUEL-CELL VEHICLES: TECHNICALIn the FCEV, the hydrogen fuel cell could supply the "net"

Delucchi, Mark

1992-01-01T23:59:59.000Z

136

Parallel and Adaptive Simulation of Fuel Cells Robert Klfkorn1  

E-Print Network [OSTI]

Parallel and Adaptive Simulation of Fuel Cells in 3d Robert Klöfkorn1 , Dietmar Kröner1 , Mario) fuel cells. Hereby, we focus on the simulation done in 3d us- ing modern techniques like higher order and the transport of species in the cathodic gas diffusion layer of the fuel cell. Therefore, from the detailed

Münster, Westfälische Wilhelms-Universität

137

DOE Fuel Cell Technologies Office: 2013 Fuel Cell Seminar and...  

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

DOE Fuel Cell Technologies Office: 2013 Fuel Cell Seminar and Energy Exposition DOE Fuel Cell Technologies Office: 2013 Fuel Cell Seminar and Energy Exposition Overview of DOE's...

138

DOE Fuel Cell Technologies Office Record 13012: Fuel Cell System...  

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

Fuel Cell Technologies Office Record 13012: Fuel Cell System Cost - 2013 DOE Fuel Cell Technologies Office Record 13012: Fuel Cell System Cost - 2013 This program record from the...

139

Hydrogen and Fuel Cell Technologies Update: 2010 Fuel Cell Seminar...  

Broader source: Energy.gov (indexed) [DOE]

Hydrogen and Fuel Cell Technologies Update: 2010 Fuel Cell Seminar and Exposition Hydrogen and Fuel Cell Technologies Update: 2010 Fuel Cell Seminar and Exposition Presentation by...

140

Microbial fuel cell treatment of fuel process wastewater  

DOE Patents [OSTI]

The present invention is directed to a method for cleansing fuel processing effluent containing carbonaceous compounds and inorganic salts, the method comprising contacting the fuel processing effluent with an anode of a microbial fuel ell, the anode containing microbes thereon which oxidatively degrade one or more of the carbonaceous compounds while producing electrical energy from the oxidative degradation, and directing the produced electrical energy to drive an electrosorption mechanism that operates to reduce the concentration of one or more inorganic salts in the fuel processing effluent, wherein the anode is in electrical communication with a cathode of the microbial fuel cell. The invention is also directed to an apparatus for practicing the method.

Borole, Abhijeet P; Tsouris, Constantino

2013-12-03T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

Water injected fuel cell system compressor  

DOE Patents [OSTI]

A fuel cell system including a dry compressor for pressurizing air supplied to the cathode side of the fuel cell. An injector sprays a controlled amount of water on to the compressor's rotor(s) to improve the energy efficiency of the compressor. The amount of water sprayed out the rotor(s) is controlled relative to the mass flow rate of air inputted to the compressor.

Siepierski, James S. (Williamsville, NY); Moore, Barbara S. (Victor, NY); Hoch, Martin Monroe (Webster, NY)

2001-01-01T23:59:59.000Z

142

A NEW PEMFC FLOW FIELD PLATE OPTIMIZATION COMPARISON - ANSYS FLUENT FUEL-CELL SIMULATION.  

E-Print Network [OSTI]

??The performance of a new cathode flow field plate located on a PEM fuel cell was compared to an industry standard and optimal serpentine design… (more)

Soueidan, Ahmed Yassin

2012-01-01T23:59:59.000Z

143

SYNTHESIS, CHARACTERIZATION AND PERFORMANCE TESTING OF PT- BASED ELECTROCATALYSTS FOR LOW TEMPERATURE PEM FUEL CELLS.  

E-Print Network [OSTI]

??The oxygen reduction reaction (ORR) activity on the cathode plays a significant role in deciding the overall performance of proton exchange membrane (PEM) fuel cells.… (more)

Gong, Yanming

2008-01-01T23:59:59.000Z

144

Inactive end cell assembly for fuel cells for improved electrolyte management and electrical contact  

DOE Patents [OSTI]

An assembly for storing electrolyte in a carbonate fuel cell is provided. The combination of a soft, compliant and resilient cathode current collector and an inactive anode part including a foam anode in each assembly mitigates electrical contact loss during operation of the fuel cell stack. In addition, an electrode reservoir in the positive end assembly and an electrode sink in the negative end assembly are provided, by which ribbed and flat cathode members inhibit electrolyte migration in the fuel cell stack.

Yuh, Chao-Yi (New Milford, CT); Farooque, Mohammad (Danbury, CT); Johnsen, Richard (New Fairfield, CT)

2007-04-10T23:59:59.000Z

145

High Energy Novel Cathode / Alloy Automotive Cell | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency| -4Novel Cathode

146

Micro-electro-mechanical systems phosphoric acid fuel cell  

DOE Patents [OSTI]

A phosphoric acid fuel cell system comprising a porous electrolyte support, a phosphoric acid electrolyte in the porous electrolyte support, a cathode electrode contacting the phosphoric acid electrolyte, and an anode electrode contacting the phosphoric acid electrolyte.

Sopchak, David A. (Livermore, CA); Morse, Jeffrey D. (Martinez, CA); Upadhye, Ravindra S. (Pleasanton, CA); Kotovsky, Jack (Oakland, CA); Graff, Robert T. (Modesto, CA)

2010-12-21T23:59:59.000Z

147

Micro-electro-mechanical systems phosphoric acid fuel cell  

DOE Patents [OSTI]

A phosphoric acid fuel cell system comprising a porous electrolyte support, a phosphoric acid electrolyte in the porous electrolyte support, a cathode electrode contacting the phosphoric acid electrolyte, and an anode electrode contacting the phosphoric acid electrolyte.

Sopchak, David A. (Livermore, CA); Morse, Jeffrey D. (Martinez, CA); Upadhye, Ravindra S. (Pleasanton, CA); Kotovsky, Jack (Oakland, CA); Graff, Robert T. (Modesto, CA)

2010-08-17T23:59:59.000Z

148

Fuel cell system with combustor-heated reformer  

DOE Patents [OSTI]

A fuel cell system including a fuel reformer heated by a catalytic combustor fired by anode effluent and/or fuel from a liquid fuel supply providing fuel for the fuel cell. The combustor includes a vaporizer section heated by the combustor exhaust gases for vaporizing the fuel before feeding it into the combustor. Cathode effluent is used as the principle oxidant for the combustor.

Pettit, William Henry (Rochester, NY)

2000-01-01T23:59:59.000Z

149

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel  

E-Print Network [OSTI]

collectors. In a Polymer Electrolyte Membrane (PEM) fuel cell, which is widely regarded as the most promisingFUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel Cell Technologies Program: Fuel Cells Fuel Cells -- is the key to making it happen. Stationary fuel cells can be used for backup power, power for remote loca

150

POLYMER ELECTROLYTE FUEL CELLS  

E-Print Network [OSTI]

POLYMER ELECTROLYTE FUEL CELLS: The Gas Diffusion Layer Johannah Itescu Princeton University PRISM REU #12;PEM FUEL CELLS: A little background information I. What do fuel cells do? Generate electricity through chemical reaction #12;PEM FUEL CELLS: A little background information -+ + eHH 442 2 0244 22 He

Petta, Jason

151

Micro Fuel Cells Direct Methanol Fuel Cells  

E-Print Network [OSTI]

energy density of 1.5 Wh/cc; 1.5Wh/g = X5; x10 energy density of Li ion battery * Direct & complete Content (Wh) Volume(cm^3) Li-Ion Battery DMFC #12;Micro Fuel Cells TM State of MTI Micro Fuel Cells Energy Content (Wh) Volume(cm^3) Li-Ion Battery DMFC #12;Direct Methanol Fuel Cell Technology

152

Hydrogen and Fuel Cell Technologies Update: 2010 Fuel Cell Seminar...  

Energy Savers [EERE]

Update: 2010 Fuel Cell Seminar and Exposition Hydrogen and Fuel Cell Technologies Update: 2010 Fuel Cell Seminar and Exposition Presentation by Sunita Satyapal at the 2010 Fuel...

153

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

154

Inert Anode/Cathode Program: Fiscal Year 1986 annual report. [For Hall-Heroult cells  

SciTech Connect (OSTI)

Purpose of the program is to develop long-lasting, energy-efficient anodes, cathodes, and ancillary equipment for Hall-Heroult cells used by the aluminum industry. The program is divided into four tasks: Inert Anode Development, Cathode Materials Evaluation, Cathode Bonding Development, and Sensor Development. To devise sensors to control the chemistry of Hall-Heroult cells using stable anodes and cathodes. This report highlights the major FY86 technical accomplishments, which are presented in the following sections: Management, Materials Development, Materials Evaluation, Thermodynamic Evaluation, Laboratory Cell Tests, Large-Scale Tests, Cathode Materials Evaluation, Cathode Bonding Development, and Sensor Development.

Brenden, B.B.; Davis, N.C.; Koski, O.H.; Marschman, S.C.; Pool, K.H.; Schilling, C.H.; Windisch, C.F.; Wrona, B.J.

1987-06-01T23:59:59.000Z

155

Rapid thermal cycling of metal-supported solid oxide fuel cell membranes  

E-Print Network [OSTI]

co- firing at 1350°C. LSCF cathode L SCF cathode Electrolyte+6AT supported fuel cell with LSCF cathode before and afterProducts, Inc. Subsequently, LSCF (La 0.6 Sr 0.4 Co 0.8 FeO

Matus, Yuriy B.; De Jonghe, Lutgard C.; Jacobson, Craig P.; Visco, Steven J.

2004-01-01T23:59:59.000Z

156

Modelling microscale fuel cells.  

E-Print Network [OSTI]

??The focus of this work is to investigate transport phenomena in recently developed microscale fuel cell designs using computational fluid dynamics (CFD). Two microscale fuel… (more)

Bazylak, Aimy Ming Jii

2009-01-01T23:59:59.000Z

157

Fuel Cell Technologies Overview  

Broader source: Energy.gov (indexed) [DOE]

Cells Key Benefits Very High Efficiency Reduced CO 2 Emissions Reduced Oil Use Reduced Air Pollution Fuel Flexibility * 40 - 60% (electrical) * > 70% (electrical, hybrid fuel...

158

Investigation of the performance and water transport of a polymer electrolyte membrane (pem) fuel cell  

E-Print Network [OSTI]

Fuel cell performance was obtained as functions of the humidity at the anode and cathode sites, back pressure, flow rate, temperature, and channel depth. The fuel cell used in this work included a membrane and electrode assembly (MEA) which...

Park, Yong Hun

2009-05-15T23:59:59.000Z

159

High specific power, direct methanol fuel cell stack  

DOE Patents [OSTI]

The present invention is a fuel cell stack including at least one direct methanol fuel cell. A cathode manifold is used to convey ambient air to each fuel cell, and an anode manifold is used to convey liquid methanol fuel to each fuel cell. Tie-bolt penetrations and tie-bolts are spaced evenly around the perimeter to hold the fuel cell stack together. Each fuel cell uses two graphite-based plates. One plate includes a cathode active area that is defined by serpentine channels connecting the inlet manifold with an integral flow restrictor to the outlet manifold. The other plate includes an anode active area defined by serpentine channels connecting the inlet and outlet of the anode manifold. Located between the two plates is the fuel cell active region.

Ramsey, John C. (Los Alamos, NM); Wilson, Mahlon S. (Los Alamos, NM)

2007-05-08T23:59:59.000Z

160

Solid oxide 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.

Jankowksi, Alan F.; Morse, Jeffrey D.

2007-03-13T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

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

162

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

163

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

164

Microfluidic fuel cells.  

E-Print Network [OSTI]

??Microfluidic fuel cell architectures are presented in this thesis. This work represents the mechanical and microfluidic portion of a microfluidic biofuel cell project. While the… (more)

Kjeang, Erik

2007-01-01T23:59:59.000Z

165

fuel cells | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

fuel cells fuel cells Leads No leads are available at this time. The Molecular Bond: October 2014 The Molecular Bond newsletter banner October 2014 FROM THE DIRECTOR Read more...

166

Fuel cell power supply with oxidant and fuel gas switching  

DOE Patents [OSTI]

This invention relates to a fuel cell vehicular power plant. Fuel for the fuel stack is supplied by a hydrocarbon (methanol) catalytic cracking reactor and CO shift reactor. A water electrolysis subsystem is associated with the stack. During low power operation part of the fuel cell power is used to electrolyze water with hydrogen and oxygen electrolysis products being stored in pressure vessels. During peak power intervals, viz, during acceleration or start-up, pure oxygen and pure hydrogen from the pressure vessel are supplied as the reaction gases to the cathodes and anodes in place of air and methanol reformate. This allows the fuel cell stack to be sized for normal low power/air operation but with a peak power capacity several times greater than that for normal operation.

McElroy, James F. (Hamilton, MA); Chludzinski, Paul J. (Swampscott, MA); Dantowitz, Philip (Peabody, MA)

1987-01-01T23:59:59.000Z

167

Fuel cell power supply with oxidant and fuel gas switching  

DOE Patents [OSTI]

This invention relates to a fuel cell vehicular power plant. Fuel for the fuel stack is supplied by a hydrocarbon (methanol) catalytic cracking reactor and CO shift reactor. A water electrolysis subsystem is associated with the stack. During low power operation part of the fuel cell power is used to electrolyze water with hydrogen and oxygen electrolysis products being stored in pressure vessels. During peak power intervals, viz, during acceleration or start-up, pure oxygen and pure hydrogen from the pressure vessel are supplied as the reaction gases to the cathodes and anodes in place of air and methanol reformate. This allows the fuel cell stack to be sized for normal low power/air operation but with a peak power capacity several times greater than that for normal operation. 2 figs.

McElroy, J.F.; Chludzinski, P.J.; Dantowitz, P.

1987-04-14T23:59:59.000Z

168

Webinar: Fuel Cell Buses  

Broader source: Energy.gov [DOE]

Video recording and text version of the webinar titled, Fuel Cell Buses, originally presented on September 12, 2013.

169

FUEL CELLS FOR TRANSPORTATION  

E-Print Network [OSTI]

................................................................................................... 34 E. Cost Analyses of Fuel Cell Stacks/Systems ­ Arthur D. Little, Inc. ......................................... 40 F. DFMA Cost Estimates of Fuel-Cell/Reformer Systems at Low/Medium/High Production Rates&D of a Novel Breadboard Device Suitable for Carbon Monoxide Remediation in an Automotive PEM Fuel Cell Power

170

In situ Foaming of Porous (La{sub 0.6}Sr{sub 0.4}){sub 0.98} (Co{sub 0.2} Fe{sub 0.8}) O{sub 3-{delta}} (LSCF) Cathodes for Solid Oxide Fuel Cell Applications  

SciTech Connect (OSTI)

A binder system containing polyurethane precursors was used to in situ foam (direct foam) a (La{sub 0.6}Sr{sub 0.4}){sub 0.98} (Co{sub 0.2} Fe{sub 0.8}) O{sub 3-{#2;delta}} (LSCF) composition for solid oxide fuel cell (SOFC) cathode applications. The relation between in situ foaming parameters on the final microstructure and electrochemical properties was characterized by microscopy and electrochemical impedance spectroscopy (EIS), respectively. The optimal porous cathode architecture was formed with a 70 vol% solids loading within a polymer precursor composition with a volume ratio of 8:4:1 (isocyanate: PEG: surfactant) in a terpineol-based ink vehicle. The resultant microstructure displayed a broad pore size distribution with highly elongated pore structure.

Gandavarapu, Sodith; Sabolsky, Edward; Sabolsky, Katarzyna; Gerdes, Kirk

2013-07-01T23:59:59.000Z

171

Proceedings of FUELCELL2006 The 4th International Conference on FUEL CELL SCIENCE, ENGINEERING and TECHNOLOGY  

E-Print Network [OSTI]

-models: anode, cathode, fuel cell body, and cooling. Additionally, the oxidant supply blower, cooling pump, and cooling fan are explicitly incorporated. Mass and energy conservation are applied to each using a lumped an Anode ca Cathode clt Coolant co Crossover dyn Dynamic f Liquid fluid fan Cooling fan fc Fuel cell fs

Yao, Bin

172

Solid oxide fuel cell having monolithic core  

DOE Patents [OSTI]

A solid oxide fuel cell is described for electrochemically combining fuel and oxidant for generating galvanic output, wherein the cell core has an array of electrolyte and interconnect walls that are substantially devoid of any composite inert materials for support. Instead, the core is monolithic, where each electrolyte wall consists of thin layers of cathode and anode materials sandwiching a thin layer of electrolyte material therebetween. The electrolyte walls are arranged and backfolded between adjacent interconnect walls operable to define a plurality of core passageways alternately arranged where the inside faces thereof have only the anode material or only the cathode material exposed. Means direct the fuel to the anode-exposed core passageways and means direct the oxidant to the anode-exposed core passageways and means direct the oxidant to the cathode-exposed core passageway; and means also direct the galvanic output to an exterior circuit. Each layer of the electrolyte and interconnect materials is of the order of 0.002 to 0.01 cm thick; and each layer of the cathode and anode materials is of the order of 0.002 to 0.05 cm thick.

Ackerman, J.P.; Young, J.E.

1983-10-12T23:59:59.000Z

173

Tubular solid oxide fuel cell current collector  

DOE Patents [OSTI]

An internal current collector for use inside a tubular solid oxide fuel cell (TSOFC) electrode comprises a tubular coil spring disposed concentrically within a TSOFC electrode and in firm uniform tangential electrical contact with the electrode inner surface. The current collector maximizes the contact area between the current collector and the electrode. The current collector is made of a metal that is electrically conductive and able to survive under the operational conditions of the fuel cell, i.e., the cathode in air, and the anode in fuel such as hydrogen, CO, CO.sub.2, H.sub.2O or H.sub.2S.

Bischoff, Brian L. (Knoxville, TN); Sutton, Theodore G. (Kingston, TN); Armstrong, Timothy R. (Clinton, TN)

2010-07-20T23:59:59.000Z

174

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

175

Direct hydrocarbon fuel cells  

DOE Patents [OSTI]

The direct electrochemical oxidation of hydrocarbons in solid oxide fuel cells, to generate greater power densities at lower temperatures without carbon deposition. The performance obtained is comparable to that of fuel cells used for hydrogen, and is achieved by using novel anode composites at low operating temperatures. Such solid oxide fuel cells, regardless of fuel source or operation, can be configured advantageously using the structural geometries of this invention.

Barnett, Scott A.; Lai, Tammy; Liu, Jiang

2010-05-04T23:59:59.000Z

176

Automated brush plating process for solid oxide fuel cells  

DOE Patents [OSTI]

A method of depositing a metal coating (28) on the interconnect (26) of a tubular, hollow fuel cell (10) contains the steps of providing the fuel cell (10) having an exposed interconnect surface (26); contacting the inside of the fuel cell (10) with a cathode (45) without use of any liquid materials; passing electrical current through a contacting applicator (46) which contains a metal electrolyte solution; passing the current from the applicator (46) to the cathode (45) and contacting the interconnect (26) with the applicator (46) and coating all of the exposed interconnect surface.

Long, Jeffrey William (Pittsburgh, PA)

2003-01-01T23:59:59.000Z

177

Hybrid direct methanol fuel cells.  

E-Print Network [OSTI]

??A new type of fuel cell that combines the advantages of a proton exchange membrane fuel cells and anion exchange membrane fuel cells operated with… (more)

Joseph, Krishna Sathyamurthy

2012-01-01T23:59:59.000Z

178

DOE Fuel Cell Technologies Office Record 14012: Fuel Cell System...  

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

2: Fuel Cell System Cost - 2013 DOE Fuel Cell Technologies Office Record 14012: Fuel Cell System Cost - 2013 This program record from the U.S. Department of Energy's Fuel Cell...

179

Electroless deposition of electrodes in solid-oxide fuel cells  

SciTech Connect (OSTI)

This study demonstrates the use of electroless deposition for depositing anode and cathode electrocatalysts in solid-oxide fuel cells (SOFC). Ni, Pd, and Ag films produced by electroless deposition techniques were in intimate contact with the electrolyte yttria-stabilized zirconia, and were found to catalyze SOFC anodic and cathodic reactions. Power densities of such cells were in the range of 0.33 W/cm[sup 2] at 800 C. The operating life is low due to agglomeration of the anode and densification of the cathode. For intermediate temperature/range SOFCs electroless deposition is an alternative technique for electrode preparation, if long-term stability can be attained.

Murphy, M.M.; Van Herle, J.; McEvoy, A.J.; Thampi, K.R. (Ecole Polytechnique Federale de Lausanne (Switzerland). Inst. de Chimie Physique)

1994-08-01T23:59:59.000Z

180

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

Note: This page contains sample records for the topic "fuel cell cathode" 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.


181

Method of fabricating a monolithic solid oxide fuel cell  

DOE Patents [OSTI]

In a two-step densifying process of making a monolithic solid oxide fuel cell, a limited number of anode-electrolyte-cathode cells separated by an interconnect layer are formed and partially densified. Subsequently, the partially densified cells are stacked and further densified to form a monolithic array.

Minh, Nguyen Q. (Fountain Valley, CA); Horne, Craig R. (Redondo Beach, CA)

1994-01-01T23:59:59.000Z

182

Method of fabricating a monolithic solid oxide fuel cell  

DOE Patents [OSTI]

In a two-step densifying process of making a monolithic solid oxide fuel cell, a limited number of anode-electrolyte-cathode cells separated by an interconnect layer are formed and partially densified. Subsequently, the partially densified cells are stacked and further densified to form a monolithic array. 10 figures.

Minh, N.Q.; Horne, C.R.

1994-03-01T23:59:59.000Z

183

Webinar: Fuel Cell Mobile Lighting  

Broader source: Energy.gov [DOE]

Video recording of the Fuel Cell Technologies Office webinar, Fuel Cell Mobile Lighting, originally presented on November 13, 2012.

184

Direct Ethanol Fuel Cells: Platinum/Rhodium Anode  

E-Print Network [OSTI]

Direct Ethanol Fuel Cells: Platinum/Rhodium Anode Catalysis Ken Ellis-Guardiola PCCM REU 2010 #12 EtOH+3H2O 12H+ +2CO2+ 12e- Pt C 4H+ + 4e- + O2 2H2O O2 Anode Cathode The Direct Ethanol Fuel Cell #12;The addition of other metals to Platinum improves its fuel cell performance Pt alone is easily

Petta, Jason

185

Microcomposite Fuel Cell Membranes  

Broader source: Energy.gov [DOE]

Summary of microcomposite fuel cell membrane work presented to the High Temperature Membrane Working Group Meeting, Orlando FL, October 17, 2003

186

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.

187

Electrochimica Acta 50 (2005) 53905398 Membraneless laminar flow-based micro fuel cells operating in alkaline,  

E-Print Network [OSTI]

Electrochimica Acta 50 (2005) 5390­5398 Membraneless laminar flow-based micro fuel cells operating) in membraneless, laminar flow-based micro fuel cells (LF-FCs) eliminates several PEM-related issues such as fuel the anode is in acidic media while the cathode is in alkali, or vice versa. Operating a fuel cell under

Kenis, Paul J. A.

188

Direct methanol fuel cell and system  

DOE Patents [OSTI]

A fuel cell having an anode and a cathode and a polymer electrolyte membrane located between anode and cathode gas diffusion backings uses a methanol vapor fuel supply. A permeable polymer electrolyte membrane having a permeability effective to sustain a carbon dioxide flux equivalent to at least 10 mA/cm.sup.2 provides for removal of carbon dioxide produced at the anode by reaction of methanol with water. Another aspect of the present invention includes a superabsorpent polymer material placed in proximity to the anode gas diffusion backing to hold liquid methanol or liquid methanol solution without wetting the anode gas diffusion backing so that methanol vapor from the liquid methanol or liquid methanol-water solution is supplied to the membrane.

Wilson, Mahlon S. (Los Alamos, NM)

2004-10-26T23:59:59.000Z

189

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

190

Fuel Cell Technologies Overview  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy Frozen TelescopeRenewable 0 0 A N09Fuel Cell

191

DOE Fuel Cell Technologies Program Record, Record # 11003, Fuel...  

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

DOE Fuel Cell Technologies Program Record, Record 11003, Fuel Cell Stack Durability DOE Fuel Cell Technologies Program Record, Record 11003, Fuel Cell Stack Durability Dated...

192

Indirect-fired gas turbine dual fuel cell power cycle  

DOE Patents [OSTI]

A fuel cell and gas turbine combined cycle system which includes dual fuel cell cycles combined with a gas turbine cycle wherein a solid oxide fuel cell cycle operated at a pressure of between 6 to 15 atms tops the turbine cycle and is used to produce CO.sub.2 for a molten carbonate fuel cell cycle which bottoms the turbine and is operated at essentially atmospheric pressure. A high pressure combustor is used to combust the excess fuel from the topping fuel cell cycle to further heat the pressurized gas driving the turbine. A low pressure combustor is used to combust the excess fuel from the bottoming fuel cell to reheat the gas stream passing out of the turbine which is used to preheat the pressurized air stream entering the topping fuel cell before passing into the bottoming fuel cell cathode. The CO.sub.2 generated in the solid oxide fuel cell cycle cascades through the system to the molten carbonate fuel cell cycle cathode.

Micheli, Paul L. (Sacramento, CA); Williams, Mark C. (Morgantown, WV); Sudhoff, Frederick A. (Morgantown, WV)

1996-01-01T23:59:59.000Z

193

Fuel cell water transport  

DOE Patents [OSTI]

The moisture content and temperature of hydrogen and oxygen gases is regulated throughout traverse of the gases in a fuel cell incorporating a solid polymer membrane. At least one of the gases traverses a first flow field adjacent the solid polymer membrane, where chemical reactions occur to generate an electrical current. A second flow field is located sequential with the first flow field and incorporates a membrane for effective water transport. A control fluid is then circulated adjacent the second membrane on the face opposite the fuel cell gas wherein moisture is either transported from the control fluid to humidify a fuel gas, e.g., hydrogen, or to the control fluid to prevent excess water buildup in the oxidizer gas, e.g., oxygen. Evaporation of water into the control gas and the control gas temperature act to control the fuel cell gas temperatures throughout the traverse of the fuel cell by the gases.

Vanderborgh, Nicholas E. (Los Alamos, NM); Hedstrom, James C. (Los Alamos, NM)

1990-01-01T23:59:59.000Z

194

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

195

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

196

Automotive Fuel Cell Corporation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program Cumulus Humilis, 2014AutomatedAutomotive Fuel Cell

197

Fuel Cells Vehicle Systems Analysis (Fuel Cell Freeze Investigation)  

SciTech Connect (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

198

Compliant fuel cell system  

DOE Patents [OSTI]

A fuel cell assembly comprising at least one metallic component, at least one ceramic component and a structure disposed between the metallic component and the ceramic component. The structure is configured to have a lower stiffness compared to at least one of the metallic component and the ceramic component, to accommodate a difference in strain between the metallic component and the ceramic component of the fuel cell assembly.

Bourgeois, Richard Scott (Albany, NY); Gudlavalleti, Sauri (Albany, NY)

2009-12-15T23:59:59.000Z

199

Composite fuel cell membranes  

SciTech Connect (OSTI)

A bilayer or trilayer composite ion exchange membrane 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, Keith R. (Lake Jackson, TX); Rehg, Timothy J. (Lake Jackson, TX); Davis, Larry W. (West Columbia, TX); Carl, William P. (Marble Falls, TX); Cisar, Alan J. (Cypress, TX); Eastland, Charles S. (West Columbia, TX)

1997-01-01T23:59:59.000Z

200

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

Note: This page contains sample records for the topic "fuel cell cathode" 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

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 productthe potential advantages of fuel cells as clean and reliable

Lipman, Timothy E.

2000-01-01T23:59:59.000Z

202

Low cost fuel cell diffusion layer configured for optimized anode water management  

DOE Patents [OSTI]

A fuel cell comprises a cathode gas diffusion layer, a cathode catalyst layer, an anode gas diffusion layer, an anode catalyst layer and an electrolyte. The diffusion resistance of the anode gas diffusion layer when operated with anode fuel is higher than the diffusion resistance of the cathode gas diffusion layer. The anode gas diffusion layer may comprise filler particles having in-plane platelet geometries and be made of lower cost materials and manufacturing processes than currently available commercial carbon fiber substrates. The diffusion resistance difference between the anode gas diffusion layer and the cathode gas diffusion layer may allow for passive water balance control.

Owejan, Jon P; Nicotera, Paul D; Mench, Matthew M; Evans, Robert E

2013-08-27T23:59:59.000Z

203

High Power Impulse Magnetron Sputtering deposition of Pt inside fuel cell electrodes  

E-Print Network [OSTI]

1 High Power Impulse Magnetron Sputtering deposition of Pt inside fuel cell electrodes S Cuynet1 as a cathode of a proton exchange membrane fuel cell. An increase of 80 % at 0.65 V of the PEMFC power density) 272001" #12;2 Proton exchange membrane fuel cells (PEMFC) have the potential to provide

Paris-Sud XI, Université de

204

Sputter-Deposited Pt PEM Fuel Cell Electrodes: Particles vs M. D. Gasda,a  

E-Print Network [OSTI]

Sputter-Deposited Pt PEM Fuel Cell Electrodes: Particles vs Layers M. D. Gasda,a R. Teki,b T.-M. Lu as cathode electrodes in proton exchange membrane PEM fuel cells using Nafion 1135 membranes and Teflon, 2009. Published March 24, 2009. Polymer electrolyte membrane or proton exchange membrane PEM fuel cells

Gall, Daniel

205

Modeling of the mixed potential in hydrogen peroxide-based fuel cells  

E-Print Network [OSTI]

Modeling of the mixed potential in hydrogen peroxide-based fuel cells L. An, T.S. Zhao*, Z.H. Chai 28 February 2014 Available online 31 March 2014 Keywords: Fuel cell Hydrogen peroxide Mixed potential (HPOR) at the cathode of hydrogen peroxide-based fuel cells. The complicated physicochemical processes

Zhao, Tianshou

206

Doped Graphene as a Material for Oxygen Reduction Reaction in Hydrogen Fuel Cells: A Computational Study  

E-Print Network [OSTI]

Doped Graphene as a Material for Oxygen Reduction Reaction in Hydrogen Fuel Cells: A Computational be used to make an efficient and relatively inexpensive graphene-based material for hydrogen fuel cells fuel cells for oxygen reduction at the cathode. In an attempt to find a cheap yet efficient catalyst

Krasheninnikov, Arkady V.

207

FUEL CELL TECHNOLOGIES PROGRAM Technologies  

E-Print Network [OSTI]

and fuel cells offer great promise for our energy future. Fuel cell vehicles are not yet commercially, such as a hydrogen fueling station or hydrogen fuel cell vehicle. Technology validation does not certify, and the Federal Government to evaluate hydrogen fuel cell vehicle and infrastructure technologies together in real

208

Fuel Cell Technologies Program Overview  

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

CSD Workshop Washington, DC Fuel Cell Technologies Program Overview Dr. Sunita Satyapal Director, Fuel Cell Technologies Office Energy Efficiency and Renewable Energy U.S....

209

Fuel cells: A handbook (Revision 3)  

SciTech Connect (OSTI)

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

210

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

SciTech Connect (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

211

2003 DOE Hydrogen and Fuel Cells Merit Review Meeting, May 19-22, 2003  

E-Print Network [OSTI]

Rapid ORR EC Screening Platform Optimization Scale up of best catalyst Cathode Structure Optimization 50 Modeling an optimization of novel cathode structures Scale up of best catalyst SMP DuPont Fuel Cells SMP Reactor Quench Collection Regent Feed Stock Droplet Generation Droplet Size Distribution Modification Low

212

Energy 101: Fuel Cells | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Fuel Cells Energy 101: Fuel Cells Addthis Description Learn everything you need to know about fuel cells. Topic Hydrogen & Fuel Cells...

213

Cell Analysis ? High-Energy Density Cathodes and Anodes  

Broader source: Energy.gov (indexed) [DOE]

does not contain any proprietary, confidential, or otherwise restricted information LBNL Project ID: ES053 OVERVIEW Timeline * PI Joined BATT 2001 * Cathodes Task Started 2001...

214

Fuel dissipater for pressurized fuel cell generators  

DOE Patents [OSTI]

An apparatus and method are disclosed for eliminating the chemical energy of fuel remaining in a pressurized fuel cell generator (10) when the electrical power output of the fuel cell generator is terminated during transient operation, such as a shutdown; where, two electrically resistive elements (two of 28, 53, 54, 55) at least one of which is connected in parallel, in association with contactors (26, 57, 58, 59), a multi-point settable sensor relay (23) and a circuit breaker (24), are automatically connected across the fuel cell generator terminals (21, 22) at two or more contact points, in order to draw current, thereby depleting the fuel inventory in the generator.

Basel, Richard A.; King, John E.

2003-11-04T23:59:59.000Z

215

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

216

Seventh Edition Fuel Cell Handbook  

SciTech Connect (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

217

National Fuel Cell Research Center  

E-Print Network [OSTI]

National Fuel Cell Research Center www.nfcrc.uci.edu MOLTEN CARBONATE FUEL CELLS STEADY STATE MODELING OF MOLTEN CARBONATE FUEL CELLS FOR SYSTEM PERFORMANCE ANALYSES OVERVIEW Development of steady state and dynamic simulation capabilities for molten carbonate fuel cell (MCFC) technology is being

Mease, Kenneth D.

218

Shipboard Fuel Cell Biofuel Introduction  

E-Print Network [OSTI]

Update FuelCell Energy (Frank Wolak) 1230 PNNL SOFC Power Systems Update PNNL (Larry Chick) 1300 PEM Lessons Learned · System Generic Concepts (PEM, HT PEM, MCFC, SOFC) · Shipboard Fuel Cell CharacteristicsShipboard Fuel Cell ­ Biofuel Introduction: This program will demonstrate a shipboard fuel cell

219

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.

220

Enhanced methanol utilization in direct methanol fuel cell  

DOE Patents [OSTI]

The fuel utilization of a direct methanol fuel cell is enhanced for improved cell efficiency. Distribution plates at the anode and cathode of the fuel cell are configured to distribute reactants vertically and laterally uniformly over a catalyzed membrane surface of the fuel cell. A conductive sheet between the anode distribution plate and the anodic membrane surface forms a mass transport barrier to the methanol fuel that is large relative to a mass transport barrier for a gaseous hydrogen fuel cell. In a preferred embodiment, the distribution plate is a perforated corrugated sheet. The mass transport barrier may be conveniently increased by increasing the thickness of an anode conductive sheet adjacent the membrane surface of the fuel cell.

Ren, Xiaoming (Los Alamos, NM); Gottesfeld, Shimshon (Los Alamos, NM)

2001-10-02T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

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...

Acharya, Prabha Ramchandra

2005-11-01T23:59:59.000Z

222

On the mechanism of operation of a cathode spot cell in a vacuum arc  

SciTech Connect (OSTI)

The erosive structures formed on a tungsten cathode as a result of the motion of the cathode spot of a vacuum arc over the cathode surface have been examined. It has been found that the average mass of a cathode microprotrusion having the shape of a solidified jet is approximately equal to the mass of ions removed from the cathode within the lifetime of a cathode spot cell carrying a current of several amperes. The time of formation of a new liquid-metal jet under the action of the reactive force of the plasma ejected by the cathode spot is about 10?ns, which is comparable to the lifetime of a cell. The growth rate of a liquid-metal jet is ?10{sup 4}?cm/s. The geometric shape and size of a solidified jet are such that a new explosive emission center (spot cell) can be initiated within several nanoseconds during the interaction of the jet with the dense cathode plasma. This is the underlying mechanism of the self-sustained operation of a vacuum arc.

Mesyats, G. A.; Petrov, A. A. [P. N. Lebedev Physical Institute, RAS, 53 Leninsky Ave., Moscow 119991 (Russian Federation); Bochkarev, M. B. [Institute of Electrophysics, UB, RAS, 106 Amundsen St., Ekaterinburg 620016 (Russian Federation); Barengolts, S. A., E-mail: sb@nsc.gpi.ru [A. M. Prokhorov General Physics Institute, RAS, 38 Vavilov St., Moscow 119991 (Russian Federation)

2014-05-05T23:59:59.000Z

223

Deactivation and poisoning of fuel cell catalysts  

SciTech Connect (OSTI)

The deactivation and poisoning phenomena reviewed are: the poisoning of anode (fuel electrode) catalyst by carbon monoxide and hydrogen sulfide; the deactivation of the cathode (air electrode) catalyst by sintering; and the deactivation of the cathode by corrosion of the support. The anode catalyst is Pt supported on a conductive, high area carbon black, usually at a loading of 10 w/o. This catalyst is tolerant to some level of carbon monoxide or hydrogen sulfide or both in combination, the level depending on temperature and pressure. Carbon monoxide poisoning has been studied extensively, including detailed adsorption studies at various temperatures and pressures. Predictive models have been developed that effectively predict anode tolerance to carbon monoxide. Much less is known about hydrogen sulfide poisoning. Typical tolerance levels are 2% CO, and 10 ppM H/sub 2/S. The cathode catalyst is typically Pt supported on a graphitic carbon black, usually a furnace black heat-treated to 2700/sup 0/C. The Pt loading is typically 10 w/o, and the dispersion (or percent exposed) as-prepared is typically 30%. The loss of dispersion in use depends on the operational parameters, most especially the cathode potential history, i.e. higher potentials cause more rapid decrease in dispersion. The mechanism of loss of dispersion is not well known. The graphitic carbon support corrodes at a finite rate that is also potential dependent. Support corrosion causes thickening of the eletrolyte film between the gas pores and the catalyst particles, which in turn causes increased diffusional resistance and performance loss. In addition, support corrosion may also cause loss of Pt into the separator. Support corrosion appears to be the life limiting factor for phosphoric acid fuel cells.

Ross, P.N. Jr.

1985-06-01T23:59:59.000Z

224

Advanced Cathode Catalysts and Supports for  

E-Print Network [OSTI]

1 Advanced Cathode Catalysts and Supports for PEM Fuel Cells Mark K. Debe 3M Company May 10, 2011 restricted information 2011 Annual Merit Review DOE Hydrogen and Fuel Cells and Vehicle Technologies Programs.125 Performance @ Rated (W/cm2 ) @ 0.8V 1 0.25 1 0.25 Additional Interactions GM Fuel Cell Activities, Nuvera Fuel

225

Solid oxide fuel cell matrix and modules  

DOE Patents [OSTI]

Porous refractory ceramic blocks arranged in an abutting, stacked configuration and forming a three dimensional array provide a support structure and coupling means for a plurality of solid oxide fuel cells (SOFCs). Each of the blocks includes a square center channel which forms a vertical shaft when the blocks are arranged in a stacked array. Positioned within the channel is a SOFC unit cell such that a plurality of such SOFC units disposed within a vertical shaft form a string of SOFC units coupled in series. A first pair of facing inner walls of each of the blocks each include an interconnecting channel hole cut horizontally and vertically into the block walls to form gas exit channels. A second pair of facing lateral walls of each block further include a pair of inner half circular grooves which form sleeves to accommodate anode fuel and cathode air tubes. The stack of ceramic blocks is self-supporting, with a plurality of such stacked arrays forming a matrix enclosed in an insulating refractory brick structure having an outer steel layer. The necessary connections for air, fuel, burnt gas, and anode and cathode connections are provided through the brick and steel outer shell. The ceramic blocks are so designed with respect to the strings of modules that by simple and logical design the strings could be replaced by hot reloading if one should fail. The hot reloading concept has not been included in any previous designs.

Riley, Brian (Willimantic, CT)

1990-01-01T23:59:59.000Z

226

Novel Composite Cathode Structures  

Broader source: Energy.gov (indexed) [DOE]

Relevance * New cathode materials are required to improve the energy density of Li-ion cells for transportation technologies. * The cathode system in this project directly...

227

In-situ measurement of ethanol tolerance in an operating fuel cell  

E-Print Network [OSTI]

In-situ measurement of ethanol tolerance in an operating fuel cell Matt S. Naughton a , Claire E online xxx Keywords: Alkaline fuel cell Gas diffusion electrodes Ag cathode Electrode characterization Reference electrode Non-Platinum catalyst a b s t r a c t Ethanol is seen as an attractive option as a fuel

Kenis, Paul J. A.

228

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

229

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel  

E-Print Network [OSTI]

FUEL CELL TECHNOLOGIES PROGRAM Hydrogen and Fuel Cell Technologies Program: Storage Hydrogen Storage Developing safe, reliable, compact, and cost-effective hydrogen storage tech- nologies is one be Stored? Hydrogen storage will be required onboard vehicles and at hydrogen production sites, hydrogen

230

Fuel Quality Issues in Stationary Fuel Cell Systems | Department...  

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

Fuel Quality Issues in Stationary Fuel Cell Systems Fuel Quality Issues in Stationary Fuel Cell Systems This report, prepared by Argonne National Laboratory, looks at impurities...

231

Webinar: Hydrogen Fueling for Current and Anticipated Fuel Cell...  

Broader source: Energy.gov (indexed) [DOE]

Hydrogen Fueling for Current and Anticipated Fuel Cell Electric Vehicles (FCEVs) Webinar: Hydrogen Fueling for Current and Anticipated Fuel Cell Electric Vehicles (FCEVs) Below is...

232

Light Duty Fuel Cell Electric Vehicle Hydrogen Fueling Protocol...  

Broader source: Energy.gov (indexed) [DOE]

Light Duty Fuel Cell Electric Vehicle Hydrogen Fueling Protocol Light Duty Fuel Cell Electric Vehicle Hydrogen Fueling Protocol Webinar slides from the U.S. Department of Energy...

233

Texas Hydrogen Highway - Fuel Cell Hybrid Bus and Fueling Infrastructu...  

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

Hydrogen Highway - Fuel Cell Hybrid Bus and Fueling Infrastructure Technology Showcase Texas Hydrogen Highway - Fuel Cell Hybrid Bus and Fueling Infrastructure Technology Showcase...

234

High pressure low heat rate phosphoric acid fuel cell stack  

SciTech Connect (OSTI)

A high pressure phosphoric acid fuel cell stack assembly is described comprising: (a) a stack of fuel cells for producing electricity, the stack including cathode means, anode means, and heat exchange means; (b) means for delivering pressurized air to the cathode means; (c) means for delivering a hydrogen rich fuel gas to the anode means for electrochemically reacting with oxygen in the pressurized air to produce electricity and water; (d) first conduit means connected to the cathode means for exhausting a mixture of oxygen-depleted air and reaction water from the cathode means; (e) second conduit means connected to the first conduit means for delivering a water fog to the first conduit means for entrainment in the mixture of oxygen-depleted air and reaction water to form a two phase coolant having a gaseous air phase and an entrained water droplet phase; (f) means for circulating the coolant to the heat exchange means to cool the stack solely through vaporization of the water droplet phase in the heat exchange means whereby a mixed gas exhaust of air and water vapor is exhausted from the heat exchange means; and (g) means for heating the mixed gas exhaust and delivering the heated mixed gas exhaust at reformer reaction temperatures to an autothermal reformer in the stack assembly for autothermal reaction with a raw fuel to form the hydrogen rich fuel.

Wertheim, R.J.

1987-07-07T23:59:59.000Z

235

Layed Perovskite PRBA0.5SR0.5CO205 as High Performance Cathode for Solid Oxide Fuels Using Photon Conducting Electrolyte  

SciTech Connect (OSTI)

The layered perovskite PrBa{sub 0.5}Sr{sub 0.5}Co{sub 2}O{sub 5+{delta}} (PBSC) was investigated as a cathode material for a solid oxide fuel cell using a proton-conducting electrolyte based on BaCe{sub 0.7}Y{sub 0.2}Zr{sub 0.1}O{sub 3-{delta}} (BCYZ). The sintering conditions for the PBSC-BCYZ composite cathode were optimized resulting in the lowest area-specific resistance and apparent activation energy obtained with the cathode sintered at 1200 C for 2h. The maximum power densities of the PBSC-BCYZ/BZCY/NiO-BCYZ cell were 0.179, 0.274, 0.395, and 0.522 Wcm{sup -2} at 550, 600, 650, and 700 C, respectively with a 15{micro}m thick electrolyte. A relatively low cell interfacial polarization resistance of 0.132 {Omega}cm{sup 2} at 700 C indicated that the PBSC-BCYZ could be a good cathode candidate for intermediate temperature SOFCs with proton-conducting electrolyte.

Brinkman, K.

2010-05-05T23:59:59.000Z

236

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

237

California Fuel Cell Partnership: Alternative Fuels Research  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd:June 20154: CategoricalDepartmentFuel Cell Partnership -

238

National Fuel Cell Research Center  

E-Print Network [OSTI]

National Fuel Cell Research Center www.nfcrc.uci.edu CONTROLS RESIDENTIAL FUEL CELL PHOTOVOLTAIC and efficiency, (3) RFC produces hydrogen, a flexible fuel that may be used for electricity, vehicles, heating fuel cells (RFC), we gain access to a new energy storage device that is both analogous to rechargeable

Mease, Kenneth D.

239

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

240

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 therebetween for distributing cooling water flow over the electrodes to remove heat generated by the fuel cells.

Wilson, Mahlon S. (Los Alamos, NM); Zawodzinski, Christine (Los Alamos, NM)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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 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 therebetween for distributing cooling water flow over the electrodes to remove heat generated by the fuel cells.

Wilson, Mahlon S. (Los Alamos, NM); Zawodzinski, Christine (Los Alamos, NM)

2001-01-01T23:59:59.000Z

242

Fuel cell CO sensor  

DOE Patents [OSTI]

The CO concentration in the H.sub.2 feed stream to a PEM fuel cell stack is monitored by measuring current and/or voltage behavior patterns from a PEM-probe communicating with the reformate feed stream. Pattern recognition software may be used to compare the current and voltage patterns from the PEM-probe to current and voltage telltale outputs determined from a reference cell similar to the PEM-probe and operated under controlled conditions over a wide range of CO concentrations in the H.sub.2 fuel stream. A CO sensor includes the PEM-probe, an electrical discharge circuit for discharging the PEM-probe to monitor the CO concentration, and an electrical purging circuit to intermittently raise the anode potential of the PEM-probe's anode to at least about 0.8 V (RHE) to electrochemically oxidize any CO adsorbed on the probe's anode catalyst.

Grot, Stephen Andreas (Rochester, NY); Meltser, Mark Alexander (Pittsford, NY); Gutowski, Stanley (Pittsford, NY); Neutzler, Jay Kevin (Rochester, NY); Borup, Rodney Lynn (East Rochester, NY); Weisbrod, Kirk (Los Alamos, NM)

1999-12-14T23:59:59.000Z

243

MEMS-based thin-film 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. 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.

Jankowksi, Alan F.; Morse, Jeffrey D.

2003-10-28T23:59:59.000Z

244

Development of Ultra-low Platinum Alloy Cathode Catalyst for...  

Energy Savers [EERE]

Alloy Cathode Catalyst for PEM Fuel Cells These slides were presented at the 2010 New Fuel Cell Projects Meeting on September 28, 2010. 7uscpopov.pdf More Documents &...

245

The effect of chromium oxyhydroxide on solid oxide fuel cells.  

SciTech Connect (OSTI)

Hexavalent chromium species like the oxyhydroxide, CrO{sub 2}(OH){sub 2}, or hexoxide, CrO{sub 3}, are electrochemically reduced to Cr{sub 2}O{sub 3} in solid oxide fuel cells and adversely affect the cell operating potentials. Using a narrowly focused beam from the Advanced Photon Source, such chromium oxide deposits were unequivocally identified in the active region of the cathode by X-ray diffraction, suggesting that the triple phase boundaries were partially blocked. Under fuel cell operating conditions, the reaction has an equilibrium potential of about 0.9 V and the rate of chromium oxide deposition is therefore dependent on the operating potential of the cell. It becomes diffusion limited after several hours of steady operation. At low operating potentials, lanthanum manganite cathodes begin to be reduced to MnO, which reacts with the chromium oxide to form the MnCr{sub 2}O{sub 4} spinel.

Krumpelt, M.; Cruse, T. A.; Ingram, B. J.; Routbort, J. L.; Wang, S.; Salvador, P. A.; Chen, G.; Carnegie Mellon Univ.; NETL; Ohio Univ.

2010-01-01T23:59:59.000Z

246

Indirect-fired gas turbine bottomed with fuel cell  

DOE Patents [OSTI]

An indirect-heated gas turbine cycle is bottomed with a fuel cell cycle with the heated air discharged from the gas turbine being directly utilized at the cathode of the fuel cell for the electricity-producing electrochemical reaction occurring within the fuel cell. The hot cathode recycle gases provide a substantial portion of the heat required for the indirect heating of the compressed air used in the gas turbine cycle. A separate combustor provides the balance of the heat needed for the indirect heating of the compressed air used in the gas turbine cycle. Hot gases from the fuel cell are used in the combustor to reduce both the fuel requirements of the combustor and the NOx emissions therefrom. Residual heat remaining in the air-heating gases after completing the heating thereof is used in a steam turbine cycle or in an absorption refrigeration cycle. Some of the hot gases from the cathode can be diverted from the air-heating function and used in the absorption refrigeration cycle or in the steam cycle for steam generating purposes. 1 fig.

Micheli, P.L.; Williams, M.C.; Parsons, E.L.

1995-09-12T23:59:59.000Z

247

Indirect-fired gas turbine bottomed with fuel cell  

DOE Patents [OSTI]

An indirect-heated gas turbine cycle is bottomed with a fuel cell cycle with the heated air discharged from the gas turbine being directly utilized at the cathode of the fuel cell for the electricity-producing electrochemical reaction occurring within the fuel cell. The hot cathode recycle gases provide a substantial portion of the heat required for the indirect heating of the compressed air used in the gas turbine cycle. A separate combustor provides the balance of the heat needed for the indirect heating of the compressed air used in the gas turbine cycle. Hot gases from the fuel cell are used in the combustor to reduce both the fuel requirements of the combustor and the NOx emissions therefrom. Residual heat remaining in the air-heating gases after completing the heating thereof is used in a steam turbine cycle or in an absorption refrigeration cycle. Some of the hot gases from the cathode can be diverted from the air-heating function and used in the absorption refrigeration cycle or in the steam cycle for steam generating purposes.

Micheli, Paul L. (Morgantown, WV); Williams, Mark C. (Morgantown, WV); Parsons, Edward L. (Morgantown, WV)

1995-01-01T23:59:59.000Z

248

Hydrogen,Fuel Cells & Infrastructure  

E-Print Network [OSTI]

;The President's FY04 Budget Request for FreedomCAR and Hydrogen Fuel Initiatives 4.0Office of Nuclear commercialization decision by 2015. Fuel Cell Vehicles in the Showroom and Hydrogen at Fueling Stations by 2020 #12

249

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

250

DOE Hydrogen & Fuel Cell Overview  

Broader source: Energy.gov (indexed) [DOE]

Natural Gas Power Heat + Cooling Electricity Cooling Natural Gas Natural Gas or Biogas Fuel Cell H Excess power generated by the fuel cell is fed to the grid National...

251

Fuel Cell Handbook, Fourth Edition  

SciTech Connect (OSTI)

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

252

Microfluidic Fuel Cells Erik Kjeang  

E-Print Network [OSTI]

Microfluidic Fuel Cells by Erik Kjeang M.Sc., UmeĂĄ University, 2004 A Dissertation Submitted Supervisory Committee Microfluidic Fuel Cells by Erik Kjeang M.Sc., UmeĂĄ University, 2004 Supervisory University External Examiner Microfluidic fuel cell architectures are presented in this thesis. This work

Victoria, University of

253

Precious Metal Recovery from Fuel Cell MEA's  

SciTech Connect (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

254

Fuel Cell Handbook, Fifth Edition  

SciTech Connect (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

255

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

256

Solid oxide fuel cell matrix and modules  

DOE Patents [OSTI]

Porous refractory ceramic blocks arranged in an abutting, stacked configuration and forming a three dimensional array provide a support structure and coupling means for a plurality of solid oxide fuel cells (SOFCs). The stack of ceramic blocks is self-supporting, with a plurality of such stacked arrays forming a matrix enclosed in an insulating refractory brick structure having an outer steel layer. The necessary connections for air, fuel, burnt gas, and anode and cathode connections are provided through the brick and steel outer shell. The ceramic blocks are so designed with respect to the strings of modules that by simple and logical design the strings could be replaced by hot reloading if one should fail. The hot reloading concept has not been included in any previous designs. 11 figs.

Riley, B.

1988-04-22T23:59:59.000Z

257

Carbonate fuel cell anodes  

DOE Patents [OSTI]

A molten alkali metal carbonates fuel cell porous anode of lithium ferrite and a metal or metal alloy of nickel, cobalt, nickel/iron, cobalt/iron, nickel/iron/aluminum, cobalt/iron/aluminum and mixtures thereof wherein the total iron content including ferrite and iron of the composite is about 25 to about 80 percent, based upon the total anode, provided aluminum when present is less than about 5 weight percent of the anode. A process is described for production of the lithium ferrite containing anode by slipcasting.

Donado, R.A.; Hrdina, K.E.; Remick, R.J.

1993-04-27T23:59:59.000Z

258

Carbonate fuel cell anodes  

DOE Patents [OSTI]

A molten alkali metal carbonates fuel cell porous anode of lithium ferrite and a metal or metal alloy of nickel, cobalt, nickel/iron, cobalt/iron, nickel/iron/aluminum, cobalt/iron/aluminum and mixtures thereof wherein the total iron content including ferrite and iron of the composite is about 25 to about 80 percent, based upon the total anode, provided aluminum when present is less than about 5 weight percent of the anode. A process for production of the lithium ferrite containing anode by slipcasting.

Donado, Rafael A. (Chicago, IL); Hrdina, Kenneth E. (Glenview, IL); Remick, Robert J. (Bolingbrook, IL)

1993-01-01T23:59:59.000Z

259

Fuel cell having electrolyte  

DOE Patents [OSTI]

A fuel cell having an electrolyte control volume includes a pair of porous opposed electrodes. A maxtrix is positioned between the pair of electrodes for containing an electrolyte. A first layer of backing paper is positioned adjacent to one of the electrodes. A portion of the paper is substantially previous to the acceptance of the electrolyte so as to absorb electrolyte when there is an excess in the matrix and to desorb electrolyte when there is a shortage in the matrix. A second layer of backing paper is positioned adjacent to the first layer of paper and is substantially impervious to the acceptance of electrolyte.

Wright, Maynard K. (Bethel Park, PA)

1989-01-01T23:59:59.000Z

260

Hydrogen Fueling for Current and Anticipated Fuel Cell Electric...  

Broader source: Energy.gov (indexed) [DOE]

for Current and Anticipated Fuel Cell Electric Vehicles (FCEVs) Hydrogen Fueling for Current and Anticipated Fuel Cell Electric Vehicles (FCEVs) Download presentation slides from...

Note: This page contains sample records for the topic "fuel cell cathode" 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

Power Generation in Fed-Batch Microbial Fuel Cells as a Function  

E-Print Network [OSTI]

as capable of making electricity in fuel cells include a wealth of genera of Geobacter (3, 6), Shewanella (2-chamber, air-cathode MFCs. Introduction Electricity generation using microbial fuel cells (MFCs) has drawn much,7), Pseudomonas (4), and others (1, 8-9). Electricity can be generated in MFCs using mixed cultures enriched from

262

Control assembly for controlling a fuel cell system during shutdown and restart  

DOE Patents [OSTI]

A fuel cell system and method in which the fuel cell system receives and an input oxidant gas and an input fuel gas, and in which a fuel processing assembly is provided and is adapted to at least humidify the input fuel gas which is to be supplied to the anode of the fuel cell of the system whose cathode receives the oxidant input gas via an anode oxidizing assembly which is adapted to couple the output of the anode of the fuel cell to the inlet of the cathode of the fuel cell during normal operation, shutdown and restart of the fuel cell system, and in which a control assembly is further provided and is adapted to respond to shutdown of the fuel cell system during which input fuel gas and input oxidant gas cease to be received by the fuel cell system, the control assembly being further adapted to, when the fuel cell system is shut down: control the fuel cell system so as to enable a purging gas to be able to flow through the fuel processing assembly to remove humidified fuel gas from the processing assembly and to enable a purging gas to be able to flow through the anode of the fuel cell.

Venkataraman, Ramki; Berntsen, George; Carlson, Glenn L.; Farooque, Mohammad; Beachy, Dan; Peterhans, Stefan; Bischoff, Manfred

2010-06-15T23:59:59.000Z

263

Membraneless Vanadium Redox Fuel Cell Using Laminar Flow Rosaria Ferrigno, Abraham D. Stroock, Thomas D. Clark, Michael Mayer, and  

E-Print Network [OSTI]

Membraneless Vanadium Redox Fuel Cell Using Laminar Flow Rosaria Ferrigno, Abraham D. Stroock This communication describes a small redox fuel cell fabricated using a design that omits the membrane normally used this concept by operating a millimeter-scale redox fuel cell that uses the redox couples V(V)/V(IV) (cathodic

Prentiss, Mara

264

Temperature-Dependent Simulations of Dry Gas Transport in the Electrodes of Proton Exchange Membrane Fuel Cells  

E-Print Network [OSTI]

Membrane Fuel Cells M. J. Kermani1 J. M. Stockie2 mkermani@unb.ca stockie@unb.ca 1 Post Doctoral Fellow the cathode of a proton exchange membrane (PEM) fuel cell is studied numerically. The di usion to achieve this goal is via proton exchange mem- brane (PEM) fuel cells, which in principle combine oxygen

Stockie, John

265

Pore Formation by In Situ Etching of Nanorod PEM Fuel Cell M. D. Gasda, G. A. Eisman,* and D. Gallz  

E-Print Network [OSTI]

Pore Formation by In Situ Etching of Nanorod PEM Fuel Cell Electrodes M. D. Gasda, G. A. Eisman a significant fraction of the overall cost of the fuel cell system, and much effort has therefore been directed electrolyte membranes for testing as cathode electrodes in fuel cells. The rods were etched within fully

Gall, Daniel

266

High power density solid oxide fuel cells  

DOE Patents [OSTI]

A method for producing ultra-high power density solid oxide fuel cells (SOFCs). The method involves the formation of a multilayer structure cells wherein a buffer layer of doped-ceria is deposited intermediate a zirconia electrolyte and a cobalt iron based electrode using a colloidal spray deposition (CSD) technique. For example, a cobalt iron based cathode composed of (La,Sr)(Co,Fe)O (LSCF) may be deposited on a zirconia electrolyte via a buffer layer of doped-ceria deposited by the CSD technique. The thus formed SOFC have a power density of 1400 mW/cm.sup.2 at 600.degree. C. and 900 mW/cm.sup.2 at 700.degree. C. which constitutes a 2-3 times increased in power density over conventionally produced SOFCs.

Pham, Ai Quoc; Glass, Robert S.

2004-10-12T23:59:59.000Z

267

Fuel Cells - Current Technology | Department of Energy  

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

Fuel Cells - Current Technology Fuel Cells - Current Technology Today, fuel cells are being developed to power passenger vehicles, commercial buildings, homes, and even small...

268

Microfluidic Microbial Fuel Cells for Microstructure Interrogations  

E-Print Network [OSTI]

Applications of Microscale Microbial Fuel Cell SystemsApplications of Microscale Microbial Fuel Cell Systems Infrom the use of microscale microbial fuel cells is that of

Parra, Erika Andrea

2010-01-01T23:59:59.000Z

269

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

270

Microfluidic Microbial Fuel Cells for Microstructure Interrogations  

E-Print Network [OSTI]

Model of hydrogen fuel cell kinetic losses includingschematic of typical hydrogen fuel cell performancephase factors on hydrogen fuel cell theoretical efficiency,

Parra, Erika Andrea

2010-01-01T23:59:59.000Z

271

Combined goal gasifier and fuel cell system and method  

DOE Patents [OSTI]

A molten carbonate fuel cell is combined with a catalytic coal or coal char gasifier for providing the reactant gases comprising hydrogen, carbon monoxide and carbon dioxide used in the operation of the fuel cell. These reactant gases are stripped of sulfur compounds and particulate material and are then separated in discrete gas streams for conveyance to appropriate electrodes in the fuel cell. The gasifier is arranged to receive the reaction products generated at the anode of the fuel cell by the electricity-producing electrochemical reaction therein. These reaction products from the anode are formed primarily of high temperature steam and carbon dioxide to provide the steam, the atmosphere and the heat necessary to endothermically pyrolyze the coal or char in the presence of a catalyst. The reaction products generated at the cathode are substantially formed of carbon dioxide which is used to heat air being admixed with the carbon dioxide stream from the gasifier for providing the oxygen required for the reaction in the fuel cell and for driving an expansion device for energy recovery. A portion of this carbon dioxide from the cathode may be recycled into the fuel cell with the air-carbon dioxide mixture.

Gmeindl, Frank D. (Morgantown, WV); Geisbrecht, Rodney A. (New Alexandria, PA)

1990-01-01T23:59:59.000Z

272

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

273

National Fuel Cell Research Center  

E-Print Network [OSTI]

National Fuel Cell Research Center www.nfcrc.uci.edu SOFC AND PEMFC COMPARISON Efficiency ­ Higher operating voltages and temperatures and reduced fuel processing requirements give SOFCs an efficiency FOR OPTIMIZATION · Fuel Cell · Compressor · Combustor · Turbine · Storage Tank · Heat Exchanger·Battery · Motor

Mease, Kenneth D.

274

PEM fuel cell degradation  

SciTech Connect (OSTI)

The durability of PEM fuel cells is a major barrier to the commercialization of these systems for stationary and transportation power applications. While significant progress has been made in understanding degradation mechanisms and improving materials, further improvements in durability are required to meet commercialization targets. Catalyst and electrode durability remains a primary degradation mode, with much work reported on understanding how the catalyst and electrode structure degrades. Accelerated Stress Tests (ASTs) are used to rapidly evaluate component degradation, however the results are sometimes easy, and other times difficult to correlate. Tests that were developed to accelerate degradation of single components are shown to also affect other component's degradation modes. Non-ideal examples of this include ASTs examining catalyst degradation performances losses due to catalyst degradation do not always well correlate with catalyst surface area and also lead to losses in mass transport.

Borup, Rodney L [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

275

Serially connected solid oxide fuel cells having monolithic cores  

DOE Patents [OSTI]

Disclosed is a solid oxide fuel cell for electrochemically combining fuel and oxidant for generating galvanic output. The cell core has an array of cell segments electrically serially connected in the flow direction, each segment consisting of electrolyte walls and interconnect that are substantially devoid of any composite inert materials for support. Instead, the core is monolithic, where each electrolyte wall consists of thin layers of cathode and anode materials sandwiching a thin layer of electrolyte material therebetween. Means direct the fuel to the anode-exposed core passageways and means direct the oxidant to the cathode-exposed core passageways; and means also direct the galvanic output to an exterior circuit. Each layer of the electrolyte composite materials is of the order of 0.002 to 0.01 cm thick; and each layer of the cathode and anode materials is of the order of 0.002 to 0.05 cm thick. Between 2 and 50 cell segments may be connected in series.

Herceg, J.E.

1985-05-20T23:59:59.000Z

276

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

277

Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from the GridwiseSiteDepartment ofCreatingCell Research |

278

NETL: Solid Oxide Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and water concerns associated with fossil fuel based electric power generation. The NETL Fuel Cell Program maintains a portfolio of RD&D projects that address the technical issues...

279

Hybrid Fuel Cell Technology Overview  

SciTech Connect (OSTI)

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

280

Method for reducing fuel cell output voltage to permit low power operation  

DOE Patents [OSTI]

Fuel cell performance is degraded by recycling a portion of the cathode exhaust through the cells and, if necessary, also reducing the total air flow to the cells for the purpose of permitting operation below a power level which would otherwise result in excessive voltage.

Reiser, Carl A. (Glastonbury, CT); Landau, Michael B. (West Hartford, CT)

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

FUEL CELL TECHNOLOGIES PROGRAM Case Study: Fuel  

E-Print Network [OSTI]

)/hour/ton of cooling capacity. The absorption chillers' internal pumps consume approximately 0.07 kW (supplied-switching generate significant heat during operation and must be kept cool to maintain reliable phone connectivity through March), cooling water conveys waste heat from the fuel cells to an unfired furnace for space

282

Fuel Cell Case Study  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy Frozen Telescope Looks

283

Fuel Cells Go Live  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy Frozen TelescopeRenewableEnergy

284

CLIMATE CHANGE FUEL CELL PROGRAM  

SciTech Connect (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

285

Manufacturing Fuel Cell Manhattan Project  

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

Chief Scientist. There, he was responsible for proton exchange membrane (PEM) fuel cell technology assessment and advanced development, as well as technical initiatives within...

286

Microfluidics for fuel cell applications.  

E-Print Network [OSTI]

??In this work, a microfluidics approach is applied to two fuel cell related projects; the study of deformation and contact angle hysteresis on water invasion… (more)

Stewart, Ian

2011-01-01T23:59:59.000Z

287

Air Liquide - Biogas & Fuel Cells  

Broader source: Energy.gov (indexed) [DOE]

Liquide - Biogas & Fuel Cells Hydrogen Energy Biogas Upgrading Technology 12 June 2012 Charlie.Anderson@airliquide.com 2 Air Liquide, world leader in gases for industry,...

288

E-Print Network 3.0 - anode-cathode microbial fuel Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 2 3 4 5 > >> Page: << < 1 2 3 4 5 > >> 61 Visions on Energy Production Technologies for Finland up to 2030 Summary: turbine G G After- burner Solid oxide fuel cell (SOFC) Anode...

289

ELECTRODE DEVELOPMENT FOR REVERSIBLE SOLID OXIDE FUEL CELLS  

SciTech Connect (OSTI)

The reversibility of the electrodes for a solid oxide fuel cell with an yttria-stabilized zirconia (YSZ) electrolyte was examined using electrochemical impedance spectroscopy and current interrupt methods. The fuel electrodes were nickel/zirconia cermet and lanthanum-doped strontium titanate/doped ceria composites. The air electrodes were lanthanum strontium ferrite (LSF) and lanthanum strontium copper ferrite (LSCuF). Under the experimental conditions studied all four electrodes were able to operate in both the fuel cell and electrolyzer modes. The titanate/ceria fuel electrode performed substantially better in the electrolyzer mode than state-of-art Ni-YSZ. Moreover, it showed slightly higher activity for water electrolysis as compared to hydrogen oxidation. Air electrodes were less active in the electrolyzer than fuel cell modes. LSF typically provided higher overpotential losses in both modes than copper-substituted LSF. Changes in the defect chemistry of electrode materials under cathodic and anodic polarization are discussed.

Marina, Olga A.; Coffey, Greg W.; Pederson, Larry R.; Rieke, Peter C.; Thomsen, Ed C.; Williams, Mark C.

2004-08-06T23:59:59.000Z

290

Fuel Cell Financing Options  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy Frozen Telescope Looks4 FuelUTC Power

291

Fuel Cell Technologies Overview  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy Frozen TelescopeRenewable 0 0 A N09Fuel

292

Fuel Cells at NASCAR  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy FrozenNovember 10, 2014 2014 organizedFuel

293

Fuel Cell Projects Kickoff Meeting  

Broader source: Energy.gov (indexed) [DOE]

3:40 Aligned Carbon Nanotube-Based MEA and PEMFC D-J Liu, ANL 4:00 Light Weight Low Cost PEM Fuel Cell Stacks J. Wainright, CWRU 4:20 Adaptive Stack with Subdivided Cells for...

294

Fuel Cell Research  

SciTech Connect (OSTI)

Executive Summary In conjunction with the Brown Energy Initiative, research Projects selected for the fuel cell research grant were selected on the following criteria: ? They should be fundamental research that has the potential to significantly impact the nation’s energy infrastructure. ? They should be scientifically exciting and sound. ? They should synthesize new materials, lead to greater insights, explore new phenomena, or design new devices or processes that are of relevance to solving the energy problems. ? They involve top-caliper senior scientists with a record of accomplishment, or junior faculty with outstanding promise of achievement. ? They should promise to yield at least preliminary results within the given funding period, which would warrant further research development. ? They should fit into the overall mission of the Brown Energy Initiative, and the investigators should contribute as partners to an intellectually stimulating environment focused on energy science. Based on these criteria, fourteen faculty across three disciplines (Chemistry, Physics and Engineering) and the Charles Stark Draper Laboratory were selected to participate in this effort.1 In total, there were 30 people supported, at some level, on these projects. This report highlights the findings and research outcomes of the participating researchers.

Weber, Peter M. [Brown University] [Brown University

2014-03-30T23:59:59.000Z

295

Electrocatalysts for Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4: Networking for the‹ See all

296

Fuel Cells in Telecommunications  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional ElectricalEnergy FrozenNovember 10, 2014 2014for|

297

Ceramic Fuel Cells (SOFC)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTieCelebrate Earth Day with Secretary ChuEnergyDearbornH2/FC

298

Ohio Fuel Cell Initiative  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSales LLC OrderEfficiencyOceanOctober0 -

299

Financing Fuel Cells  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat PumpRecordFederal Registry Comments MayDepartmentFinancialEnergyorganized by:

300

Nanostructured Solid Oxide Fuel Cell Electrodes  

SciTech Connect (OSTI)

The ability of Solid Oxide Fuel Cells (SOFC) to directly and efficiently convert the chemical energy in hydrocarbon fuels to electricity places the technology in a unique and exciting position to play a significant role in the clean energy revolution. In order to make SOFC technology cost competitive with existing technologies, the operating temperatures have been decreased to the range where costly ceramic components may be substituted with inexpensive metal components within the cell and stack design. However, a number of issues have arisen due to this decrease in temperature: decreased electrolyte ionic conductivity, cathode reaction rate limitations, and a decrease in anode contaminant tolerance. While the decrease in electrolyte ionic conductivities has been countered by decreasing the electrolyte thickness, the electrode limitations have remained a more difficult problem. Nanostructuring SOFC electrodes addresses the major electrode issues. The infiltration method used in this dissertation to produce nanostructure SOFC electrodes creates a connected network of nanoparticles; since the method allows for the incorporation of the nanoparticles after electrode backbone formation, previously incompatible advanced electrocatalysts can be infiltrated providing electronic conductivity and electrocatalysis within well-formed electrolyte backbones. Furthermore, the method is used to significantly enhance the conventional electrode design by adding secondary electrocatalysts. Performance enhancement and improved anode contamination tolerance are demonstrated in each of the electrodes. Additionally, cell processing and the infiltration method developed in conjunction with this dissertation are reviewed.

Sholklapper, Tal Zvi

2007-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

Direct Carbon Fuel Cell System Utilizing Solid Carbonaceous Fuels  

SciTech Connect (OSTI)

This 1-year project has achieved most of its objective and successfully demonstrated the viability of the fluidized bed direct carbon fuel cell (FB-DCFC) approach under development by Direct Carbon technologies, LLC, that utilizes solid carbonaceous fuels for power generation. This unique electrochemical technology offers high conversion efficiencies, produces proportionately less CO{sub 2} in capture-ready form, and does not consume or require water for gasification. FB-DCFC employs a specialized solid oxide fuel cell (SOFC) arrangement coupled to a Boudouard gasifier where the solid fuel particles are fluidized and reacted by the anode recycle gas CO{sub 2}. The resulting CO is electrochemically oxidized at the anode. Anode supported SOFC structures employed a porous Ni cermet anode layer, a dense yttria stabilized zirconia membrane, and a mixed conducting porous perovskite cathode film. Several kinds of untreated solid fuels (carbon and coal) were tested in bench scale FBDCFC prototypes for electrochemical performance and stability testing. Single cells of tubular geometry with active areas up to 24 cm{sup 2} were fabricated. The cells achieved high power densities up to 450 mW/cm{sup 2} at 850 C using a low sulfur Alaska coal char. This represents the highest power density reported in the open literature for coal based DCFC. Similarly, power densities up to 175 mW/cm{sup 2} at 850 C were demonstrated with carbon. Electrical conversion efficiencies for coal char were experimentally determined to be 48%. Long-term stability of cell performance was measured under galvanostatic conditions for 375 hours in CO with no degradation whatsoever, indicating that carbon deposition (or coking) does not pose any problems. Similar cell stability results were obtained in coal char tested for 24 hours under galvanostatic conditions with no sign of sulfur poisoning. Moreover, a 50-cell planar stack targeted for 1 kW output was fabricated and tested in 95% CO (balance CO{sub 2}) that simulates the composition of the coal syngas. At 800 C, the stack achieved a power density of 1176 W, which represents the largest power level demonstrated for CO in the literature. Although the FB-DCFC performance results obtained in this project were definitely encouraging and promising for practical applications, DCFC approaches pose significant technical challenges that are specific to the particular DCFC scheme employed. Long term impact of coal contaminants, particularly sulfur, on the stability of cell components and cell performance is a critically important issue. Effective current collection in large area cells is another challenge. Lack of kinetic information on the Boudouard reactivity of wide ranging solid fuels, including various coals and biomass, necessitates empirical determination of such reaction parameters that will slow down development efforts. Scale up issues will also pose challenges during development of practical FB-DCFC prototypes for testing and validation. To overcome some of the more fundamental problems, initiation of federal support for DCFC is critically important for advancing and developing this exciting and promising technology for third generation electricity generation from coal, biomass and other solid fuels including waste.

Turgut Gur

2010-04-30T23:59:59.000Z

302

Bonded polyimide fuel cell package  

DOE Patents [OSTI]

Described herein are processes for fabricating microfluidic fuel cell systems with embedded components in which micron-scale features are formed by bonding layers of DuPont Kapton.TM. polyimide laminate. A microfluidic fuel cell system fabricated using this process is also described.

Morse, Jeffrey D.; Jankowski, Alan; Graff, Robert T.; Bettencourt, Kerry

2010-06-08T23:59:59.000Z

303

Careers In Fuel Cell Technologies  

E-Print Network [OSTI]

, to combined heat and power (CHP) units used for distributed electricity generation, to passenger vehicles. Today's Technology and Its Growth Potential Today's fuel cell technology offers cost in hydrogen and fuel cells. Activities have reduced the amount of platinum needed by more than a factor

304

Hydrogen & Fuel Cells -Program Overview -  

E-Print Network [OSTI]

, Panasonic, Delphi Technologies Clean Energy Patent Growth Index Source: Clean Energy Patent Growth Index #12 and Peer Evaluation Meeting May 14, 2012 #12;Petroleum 37% Natural Gas 25% Coal 21% Nuclear Energy 9, 2010 Fuel Cells can apply to diverse sectors #12;3 Fuel Cells ­ An Emerging Global Industry Clean

305

Energy 101: Fuel Cell Technology  

SciTech Connect (OSTI)

Learn how fuel cell technology generates clean electricity from hydrogen to power our buildings and transportation-while emitting nothing but water. This video illustrates the fundamentals of fuel cell technology and its potential to supply our homes, offices, industries, and vehicles with sustainable, reliable energy.

None

2014-03-11T23:59:59.000Z

306

Energy 101: Fuel Cell Technology  

ScienceCinema (OSTI)

Learn how fuel cell technology generates clean electricity from hydrogen to power our buildings and transportation-while emitting nothing but water. This video illustrates the fundamentals of fuel cell technology and its potential to supply our homes, offices, industries, and vehicles with sustainable, reliable energy.

None

2014-06-06T23:59:59.000Z

307

Bronx Zoo Fuel Cell Project  

SciTech Connect (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

308

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, R.; George, R.A.; Shockling, L.A.

1993-04-06T23:59:59.000Z

309

Sandia National Laboratories: Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLS Exhibit at Explora MuseumFloatingFront EdgeCells Fuel Cells On

310

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

311

Fuel cell electric power production  

SciTech Connect (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, H.-S.; Heck, R. M.; Yarrington, R. M.

1985-06-11T23:59:59.000Z

312

Electrochimica Acta 52 (2007) 43174324 Porous current collectors for passive direct methanol fuel cells  

E-Print Network [OSTI]

Electrochimica Acta 52 (2007) 4317­4324 Porous current collectors for passive direct methanol fuel methanol fuel cell (DMFC) with its cathode current collector made of porous metal foam was investigated that the passive DMFC having the porous current collector yielded much higher and much more stable performance than

Zhao, Tianshou

2007-01-01T23:59:59.000Z

313

How Fuel Cells Work | Department of Energy  

Energy Savers [EERE]

Fuel Cells Work How Energy Works 30 likes How Fuel Cells Work Fuel cells produce electrical power without any combustion and operate on fuels like hydrogen, natural gas and...

314

Oxygen electrode reaction in molten carbonate fuel cells  

SciTech Connect (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

315

Fuel Cells - Green Power  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibilityFieldMinds"OfficeTourFrom3, 2015authors

316

Fuel Cells Team  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibilityFieldMinds"OfficeTourFrom3, 2015authors Judith

317

Improved Flow-Field Structures for Direct Methanol Fuel Cells  

SciTech Connect (OSTI)

The direct methanol fuel cell (DMFC) is ideal if high energy-density liquid fuels are required. Liquid fuels have advantages over compressed hydrogen including higher energy density and ease of handling. Although state-of-the-art DMFCs exhibit manageable degradation rates, excessive fuel crossover diminishes system energy and power density. Although use of dilute methanol mitigates crossover, the concomitant lowering of the gross fuel energy density (GFED) demands a complex balance-of-plant (BOP) that includes higher flow rates, external exhaust recirculation, etc. An alternative approach is redesign of the fuel delivery system to accommodate concentrated methanol. NuVant Systems Inc. (NuVant) will maximize the GFED by design and assembly of a DMFC that uses near neat methanol. The approach is to tune the diffusion of highly concentrated methanol (to the anode catalytic layer) to the back-diffusion of water formed at the cathode (i.e. in situ generation of dilute methanol at the anode layer). Crossover will be minimized without compromising the GFED by innovative integration of the anode flow-field and the diffusion layer. The integrated flow-field-diffusion-layers (IFDLs) will widen the current and potential DMFC operating ranges and enable the use of cathodes optimized for hydrogen-air fuel cells.

Gurau, Bogdan

2013-05-31T23:59:59.000Z

318

Climate Change Fuel Cell Program  

SciTech Connect (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

319

Dry compliant seal for phosphoric acid fuel cell  

DOE Patents [OSTI]

A dry compliant overlapping seal for a phosphoric acid fuel cell preformed f non-compliant Teflon to make an anode seal frame that encircles an anode assembly, a cathode seal frame that encircles a cathode assembly and a compliant seal frame made of expanded Teflon, generally encircling a matrix assembly. Each frame has a thickness selected to accommodate various tolerances of the fuel cell elements and are either bonded to one of the other frames or to a bipolar or end plate. One of the non-compliant frames is wider than the other frames forming an overlap of the matrix over the wider seal frame, which cooperates with electrolyte permeating the matrix to form a wet seal within the fuel cell that prevents process gases from intermixing at the periphery of the fuel cell and a dry seal surrounding the cell to keep electrolyte from the periphery thereof. The frames may be made in one piece, in L-shaped portions or in strips and have an outer perimeter which registers with the outer perimeter of bipolar or end plates to form surfaces upon which flanges of pan shaped, gas manifolds can be sealed.

Granata, Jr., Samuel J. (South Greensburg, PA); Woodle, Boyd M. (N. Huntingdon Township, Westmoreland County, PA)

1990-01-01T23:59:59.000Z

320

The use and optimization of stainless steel mesh cathodes in microbial electrolysis cells  

E-Print Network [OSTI]

electrolysis cells (MECs) provide a high-yield method for producing hydrogen from renewable biomass. One cost MEC systems for hydrogen production. ÂŞ 2010 Professor T. Nejat Veziroglu. Published by Elsevier for water electrolysis) [1,2], hydrogen can be evolved on the cathode under anoxic conditions, usually

Note: This page contains sample records for the topic "fuel cell cathode" 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

Fuel Cell Power (FCPower) Model  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdf Flash2006-53.pdf0.pdfCost Savings | DepartmentCase Study Fuel CellSummit |Power

322

Careers in Fuel Cell Technologies  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd:June 20154:04-21-2014 (866)ResearchCareers In Fuel Cell

323

Electrode Performance in Reversible Solid Oxide Fuel Cells  

SciTech Connect (OSTI)

The performance of several negative (fuel) and positive (air) electrode compositions for use in reversible solid oxide fuel cells (SOFC) that are capable of operating both as a fuel cell and as an electrolyzer was investigated in half-cell and full-cell tests. Negative electrode compositions studied were a nickel/zirconia cermet (Ni/YSZ) and lanthanum-substituted strontium titanate/ceria composite, whereas positive electrode compositions examined included mixed ion and electron-conducting lanthanum strontium ferrite (LSF), lanthanum strontium copper ferrite (LSCuF), lanthanum strontium cobalt ferrite (LSCoF), and lanthanum strontium manganite (LSM). While titanate/ceria and Ni/YSZ electrodes performed similarly in the fuel cell mode in half-cell tests, losses associated with electrolysis were lower for the titanate/ceria electrode. Positive electrodes all gave higher losses in the electrolysis mode when compared to the fuel cell mode. This behavior was most apparent for mixed-conducting LSF, LSCuF, and LSCoF electrodes, and discernible but smaller for LSM; observations are consistent with expected trends in the interfacial oxygen vacancy concentration under anodic and cathodic polarization. Full-cell tests conducted for cells with a thin electrolyte (7 um YSZ) similarly showed higher polarization losses in the electrolysis than fuel cell direction.

Marina, Olga A.; Pederson, Larry R.; Williams, Mark C.; Coffey, Greg W.; Meinhardt, Kerry D.; Nguyen, Carolyn D.; Thomsen, Ed C.

2007-03-22T23:59:59.000Z

324

Combustor air flow control method for fuel cell apparatus  

DOE Patents [OSTI]

A method for controlling the heat output of a combustor in a fuel cell apparatus to a fuel processor where the combustor has dual air inlet streams including atmospheric air and fuel cell cathode effluent containing oxygen depleted air. In all operating modes, an enthalpy balance is provided by regulating the quantity of the air flow stream to the combustor to support fuel cell processor heat requirements. A control provides a quick fast forward change in an air valve orifice cross section in response to a calculated predetermined air flow, the molar constituents of the air stream to the combustor, the pressure drop across the air valve, and a look up table of the orifice cross sectional area and valve steps. A feedback loop fine tunes any error between the measured air flow to the combustor and the predetermined air flow.

Clingerman, Bruce J. (Palmyra, NY); Mowery, Kenneth D. (Noblesville, IN); Ripley, Eugene V. (Russiaville, IN)

2001-01-01T23:59:59.000Z

325

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

The present invention contemplates a PEM fuel cell having electrical contact elements (including bipolar plates/septums) comprising a titanium nitride coated light weight metal (e.g., Al or Ti) core, having a passivating, protective metal layer intermediate the core and the titanium nitride. The protective layer forms a barrier to further oxidation/corrosion when exposed to the fuel cell`s operating environment. Stainless steels rich in Cr, Ni, and Mo are particularly effective protective interlayers. 6 figs.

Li, Y.; Meng, W.J.; Swathirajan, S.; Harris, S.J.; Doll, G.L.

1997-04-29T23:59:59.000Z

326

Navy fuel cell demonstration project.  

SciTech Connect (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

327

Double interconnection fuel cell array  

DOE Patents [OSTI]

A fuel cell array is made, containing number of tubular, elongated fuel cells which are placed next to each other in rows (A, B, C, D), where each cell contains inner electrodes and outer electrodes, with solid electrolyte 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 contacting the inner electrode, each cell having only three metallic felt electrical connectors which contact surrounding cells, where each row is electrically connected to the other. 5 figures.

Draper, R.; Zymboly, G.E.

1993-12-28T23:59:59.000Z

328

Climate Change Fuel Cell Program  

SciTech Connect (OSTI)

Verizon is presently operating the largest Distributed Generation Fuel Cell project in the USA. Situated in Long Island, NY, the power plant is composed of seven (7) fuel cells operating in parallel with the Utility grid from the Long Island Power Authority (LIPA). Each fuel cell has an output of 200 kW, for a total of 1.4 mW generated from the on-site plant. The remaining power to meet the facility demand is purchased from LIPA. The fuel cell plant is utilized as a co-generation system. A by-product of the fuel cell electric generation process is high temperature water. The heat content of this water is recovered from the fuel cells and used to drive two absorption chillers in the summer and a steam generator in the winter. Cost savings from the operations of the fuel cells are forecasted to be in excess of $250,000 per year. Annual NOx emissions reductions are equivalent to removing 1020 motor vehicles from roadways. Further, approximately 5.45 million metric tons (5 millions tons) of CO2 per year will not be generated as a result of this clean power generation. The project was partially financed with grants from the New York State Energy R&D Authority (NYSERDA) and from Federal Government Departments of Defense and Energy.

Paul Belard

2006-09-21T23:59:59.000Z

329

Planar solid oxide fuel cell with staged indirect-internal air and fuel preheating and reformation  

DOE Patents [OSTI]

A solid oxide fuel cell arrangement and method of use that provides internal preheating of both fuel and air in order to maintain the optimum operating temperature for the production of energy. The internal preheat passes are created by the addition of two plates, one on either side of the bipolar plate, such that these plates create additional passes through the fuel cell. This internal preheat fuel cell configuration and method reduce the requirements for external heat exchanger units and air compressors. Air or fuel may be added to the fuel cell as required to maintain the optimum operating temperature through a cathode control valve or an anode control valve, respectively. A control loop comprises a temperature sensing means within the preheat air and fuel passes, a means to compare the measured temperature to a set point temperature and a determination based on the comparison as to whether the control valves should allow additional air or fuel into the preheat or bypass manifolds of the fuel cell.

2003-10-21T23:59:59.000Z

330

Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

Rechargeable Zinc-Air Battery System for Electric Vehicles,"hthium/polymer* Zinc-air battery (Electric Fuel)* NickelThe discharge rate for the zinc/air battery was 5 hours at a

Delucchi, Mark

1992-01-01T23:59:59.000Z

331

A Reversible Planar Solid Oxide Fuel-Fed Electrolysis Cell and Solid Oxide Fuel Cell for Hydrogen and Electricity Production Operating on Natural Gas/Biomass Fuels  

SciTech Connect (OSTI)

A solid oxide fuel-assisted electrolysis technique was developed to co-generate hydrogen and electricity directly from a fuel at a reduced cost of electricity. Solid oxide fuel-assisted electrolysis cells (SOFECs), which were comprised of 8YSZ electrolytes sandwiched between thick anode supports and thin cathodes, were constructed and experimentally evaluated at various operation conditions on lab-level button cells with 2 cm2 per-cell active areas as well as on bench-scale stacks with 30 cm2 and 100 cm2 per-cell active areas. To reduce the concentration overpotentials, pore former systems were developed and engineered to optimize the microstructure and morphology of the Ni+8YSZ-based anodes. Chemically stable cathode materials, which possess good electronic and ionic conductivity and exhibit good electrocatalytic properties in both oxidizing and reducing gas atmospheres, were developed and materials properties were investigated. In order to increase the specific hydrogen production rate and thereby reduce the system volume and capital cost for commercial applications, a hybrid system that integrates the technologies of the SOFEC and the solid-oxide fuel cell (SOFC), was developed and successfully demonstrated at a 1kW scale, co-generating hydrogen and electricity directly from chemical fuels.

Tao, Greg, G.

2007-03-31T23:59:59.000Z

332

Fuel Cell Hybrid Bus Lands at Hickam AFB: Hydrogen Fuel Cell...  

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

Hybrid Bus Lands at Hickam AFB: Hydrogen Fuel Cell & Infrastructure Technologies Program, Fuel Cell Bus Demonstration Project (Fact Sheet) Fuel Cell Hybrid Bus Lands at Hickam AFB:...

333

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

334

Optimization of Fuel Cell System Operating Conditions for Fuel Cell Vehicles  

E-Print Network [OSTI]

simulation tool for hydrogen fuel cell vehicles, Journal ofApplication on Direct Hydrogen Fuel Cell Vehicles, 2008. Acsystem for direct hydrogen fuel cell vehicles Fig. 3 Driver

Zhao, Hengbing; Burke, Andy

2008-01-01T23:59:59.000Z

335

1986 fuel cell seminar: Program and abstracts  

SciTech Connect (OSTI)

Ninety nine brief papers are arranged under the following session headings: gas industry's 40 kw program, solid oxide fuel cell technology, phosphoric acid fuel cell technology, molten carbonate fuel cell technology, phosphoric acid fuel cell systems, power plants technology, fuel cell power plant designs, unconventional fuels, fuel cell application and economic assessments, and plans for commerical development. The papers are processed separately for the data base. (DLC)

none,

1986-10-01T23:59:59.000Z

336

Federico Zenith Control of fuel cells  

E-Print Network [OSTI]

Federico Zenith Control of fuel cells Doctoral thesis for the degree of philosophić doctor with control of fuel cells, focusing on high-temperature proton- exchange-membrane fuel cells. Fuel cells-wide electric grids. Whereas studies about the design of fuel cell systems and the electrochemical properties

Skogestad, Sigurd

337

Federico Zenith Control of fuel cells  

E-Print Network [OSTI]

Federico Zenith Control of fuel cells Doctoral thesis for the degree of philosophić doctor with control of fuel cells, focusing on high-temperature proton-exchange-membrane fuel cells. Fuel cells-wide electric grids. Whereas studies about the design of fuel cell systems and the electrochemical properties

Skogestad, Sigurd

338

Fuel Cells | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG | Department of Energy Freeport LNG Expansion, L.P.Fuel Cell

339

High efficiency carbonate fuel cell/turbine hybrid power cycle  

SciTech Connect (OSTI)

The hybrid power cycle studies were conducted to identify a high efficiency, economically competitive system. A hybrid power cycle which generates power at an LHV efficiency > 70% was identified that includes an atmospheric pressure direct carbonate fuel cell, a gas turbine, and a steam cycle. In this cycle, natural gas fuel is mixed with recycled fuel cell anode exhaust, providing water for reforming fuel. The mixed gas then flows to a direct carbonate fuel cell which generates about 70% of the power. The portion of the anode exhaust which is not recycled is burned and heat transferred through a heat exchanger (HX) to the compressed air from a gas turbine. The heated compressed air is then heated further in the gas turbine burner and expands through the turbine generating 15% of the power. Half the exhaust from the turbine provides air for the anode exhaust burner. All of the turbine exhaust eventually flows through the fuel cell cathodes providing the O2 and CO2 needed in the electrochemical reaction. Exhaust from the cathodes flows to a steam system (heat recovery steam generator, staged steam turbine generating 15% of the cycle power). Simulation of a 200 MW plant with a hybrid power cycle had an LHV efficiency of 72.6%. Power output and efficiency are insensitive to ambient temperature, compared to a gas turbine combined cycle; NOx emissions are 75% lower. Estimated cost of electricity for 200 MW is 46 mills/kWh, which is competitive with combined cycle where fuel cost is > $5.8/MMBTU. Key requirement is HX; in the 200 MW plant studies, a HX operating at 1094 C using high temperature HX technology currently under development by METC for coal gassifiers was assumed. A study of a near term (20 MW) high efficiency direct carbonate fuel cell/turbine hybrid power cycle has also been completed.

Steinfeld, G.; Maru, H.C. [Energy Research Corp., Danbury, CT (United States); Sanderson, R.A. [Sanderson (Robert) and Associates, Wethersfield, CT (United States)

1996-07-01T23:59:59.000Z

340

Fuel cell technology for prototype logistic fuel cell mobile systems  

SciTech Connect (OSTI)

Under the aegis of the Advanced Research Project Agency`s family of programs to develop advanced technology for dual use applications, International Fuel Cells Corporation (IFC) is conducting a 39 month program to develop an innovative system concept for DoD Mobile Electric Power (MEP) applications. The concept is to integrate two technologies, the phosphoric acid fuel cell (PAFC) with an auto-thermal reformer (ATR), into an efficient fuel cell power plant of nominally 100-kilowatt rating which operates on logistic fuels (JP-8). The ATR fuel processor is the key to meeting requirements for MEP (including weight, volume, reliability, maintainability, efficiency, and especially operation on logistic fuels); most of the effort is devoted to ATR development. An integrated demonstration test unit culminates the program and displays the benefits of the fuel cell system, relative to the standard 100-kilowatt MEP diesel engine generator set. A successful test provides the basis for proceeding toward deployment. This paper describes the results of the first twelve months of activity during which specific program aims have remained firm.

Sederquist, R.A.; Garow, J.

1995-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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 Kickoff Meeting Agenda  

Broader source: Energy.gov (indexed) [DOE]

Hamrock, 3M 9:40 New Polyelectrolyte Materials for High Temperature Fuel Cells J. Kerr, LBNL 10:00 The Design of Novel Materials Consisting of a Semi- Interpenetrating Network of...

342

CLIMATE CHANGE FUEL CELL PROGRAM  

SciTech Connect (OSTI)

ChevronTexaco has successfully operated a 200 kW PC25C phosphoric acid fuel cell power plant at the corporate data center in San Ramon, California for the past two years and seven months following installation in December 2001. This site was chosen based on the ability to utilize the combined heat (hot water) and power generation capability of this modular fuel cell power plant in an office park setting . In addition, this project also represents one of the first commercial applications of a stationary fuel cell for a mission critical data center to assess power reliability benefits. This fuel cell power plant system has demonstrated outstanding reliability and performance relative to other comparably sized cogeneration systems.

Mike Walneuski

2004-09-16T23:59:59.000Z

343

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

344

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

345

Additive Manufacturing for Fuel Cells  

Office of Energy Efficiency and Renewable Energy (EERE)

Blake Marshall, AMO's lead for Additive Manufacturing Technologies, will provide an overview of current R&D activities in additive manufacturing and its application to fuel cell prototyping and...

346

Phase III Advanced Anodes and Cathodes Utilized in Energy Efficient Aluminum Production Cells  

SciTech Connect (OSTI)

During Phase I of the present program, Alcoa developed a commercial cell concept that has been estimated to save 30% of the energy required for aluminum smelting. Phase ii involved the construction of a pilot facility and operation of two pilots. Phase iii of the Advanced Anodes and Cathodes Program was aimed at bench experiments to permit the resolution of certain questions to be followed by three pilot cells. All of the milestones related to materials, in particular metal purity, were attained with distinct improvements over work in previous phases of the program. NiO additions to the ceramic phase and Ag additions to the Cu metal phase of the cermet improved corrosion resistance sufficiently that the bench scale pencil anodes met the purity milestones. Some excellent metal purity results have been obtained with anodes of the following composition: Further improvements in anode material composition appear to be dependent on a better understanding of oxide solubilities in molten cryolite. For that reason, work was commissioned with an outside consultant to model the MeO - cryolite systems. That work has led to a better understanding of which oxides can be used to substitute into the NiO-Fe2O3 ceramic phase to stabilize the ferrites and reduce their solubility in molten cryolite. An extensive number of vertical plate bench electrolysis cells were run to try to find conditions where high current efficiencies could be attained. TiB2-G plates were very inconsistent and led to poor wetting and drainage. Pure TiB2 did produce good current efficiencies at small overlaps (shadowing) between the anodes and cathodes. This bench work with vertical plate anodes and cathodes reinforced the importance of good cathode wetting to attain high current efficiencies. Because of those conclusions, new wetting work was commissioned and became a major component of the research during the third year of Phase III. While significant progress was made in several areas, much work needs to be done. The anode composition needs further improvements to attain commercial purity targets. At the present corrosion rate, the vertical plate anodes will wear too rapidly leading to a rapidly increasing anode-cathode gap and thermal instabilities in the cell. Cathode wetting as a function of both cathode plate composition and bath composition needs to be better understood to ensure that complete drainage of the molten aluminum off the plates occurs. Metal buildup appears to lead to back reaction and low current efficiencies.

R.A. Christini; R.K. Dawless; S.P. Ray; D.A. Weirauch, Jr.

2001-11-05T23:59:59.000Z

347

NREL: Hydrogen and Fuel Cells Research - Fuel Cell Manufacturing  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions and Achievements ofLiz TorresSolectria PhotoCell Manufacturing Photo of

348

NREL: Hydrogen and Fuel Cells Research - Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions and Achievements ofLiz TorresSolectria PhotoCell Manufacturing

349

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

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions and Achievements ofLiz TorresSolectria PhotoCellMarketEvaluation

350

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

The present invention contemplates a PEM fuel cell having electrical contact elements (including bipolar plates/septums) comprising a titanium nitride coated light weight metal (e.g., Al or Ti) core, having a passivating, protective metal layer intermediate the core and the titanium nitride. The protective layer forms a barrier to further oxidation/corrosion when exposed to the fuel cell's operating environment. Stainless steels rich in CR, Ni, and Mo are particularly effective protective interlayers.

Li, Yang (Troy, MI); Meng, Wen-Jin (Okemos, MI); Swathirajan, Swathy (West Bloomfield, MI); Harris, Stephen Joel (Bloomfield, MI); Doll, Gary Lynn (Orion Township, Oakland County, MI)

2002-01-01T23:59:59.000Z

351

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

The present invention contemplates a PEM fuel cell having electrical contact elements (including bipolar plates/septums) comprising a titanium nitride coated light weight metal (e.g., Al or Ti) core, having a passivating, protective metal layer intermediate the core and the titanium nitride. The protective layer forms a barrier to further oxidation/corrosion when exposed to the fuel cell's operating environment. Stainless steels rich in CR, Ni, and Mo are particularly effective protective interlayers.

Li, Yang (Troy, MI); Meng, Wen-Jin (Okemos, MI); Swathirajan, Swathy (West Bloomfield, MI); Harris, Stephen J. (Bloomfield, MI); Doll, Gary L. (Orion Township, Oakland County, MI)

1997-01-01T23:59:59.000Z

352

Stationary Fuel Cell Evaluation (Presentation)  

SciTech Connect (OSTI)

This powerpoint presentation discusses its objectives: real world operation data from the field and state-of-the-art lab; collection; analysis for independent technology validation; collaboration with industry and end users operating stationary fuel cell systems and reporting on technology status, progress and technical challenges. The approach and accomplishments are: A quarterly data analysis and publication of first technical stationary fuel cell composite data products (data through June 2012).

Kurtz, J.; Wipke, K.; Sprik, S.; Ramsden, T.; Ainscough, C.

2012-05-01T23:59:59.000Z

353

High power density fuel cell comprising an array of microchannels  

DOE Patents [OSTI]

A phosphoric acid fuel cell according to one embodiment includes an array of microchannels defined by a porous electrolyte support structure extending between bottom and upper support layers, the microchannels including fuel and oxidant microchannels; fuel electrodes formed along some of the microchannels; and air electrodes formed along other of the microchannels. A method of making a phosphoric acid fuel cell according to one embodiment includes etching an array of microchannels in a substrate, thereby forming walls between the microchannels; processing the walls to make the walls porous, thereby forming a porous electrolyte support structure; forming anode electrodes along some of the walls; forming cathode electrodes along other of the walls; and filling the porous electrolyte support structure with a phosphoric acid electrolyte. Additional embodiments are also disclosed.

Sopchak, David A; Morse, Jeffrey D; Upadhye, Ravindra S; Kotovsky, Jack; Graff, Robert T

2014-05-06T23:59:59.000Z

354

Fuel Cells for Transportation | Department of Energy  

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

DOE R&D Activities Fuel Cells for Transportation Fuel Cells for Transportation Photo of Ford Focus fuel cell car in front of windmills The transportation sector is the single...

355

Microfluidic Microbial Fuel Cells for Microstructure Interrogations  

E-Print Network [OSTI]

Sediment microbial fuel cells demonstrating marine (left)5 FutureWork 5.1 Microfluidic Microbial Fuel Cell Continuedthe micro- patterned microbial fuel cell. Note that V oc,max

Parra, Erika Andrea

2010-01-01T23:59:59.000Z

356

Microfluidic Microbial Fuel Cells for Microstructure Interrogations  

E-Print Network [OSTI]

tion, to the typical PEM fuel cell kinetics, the system alsostudied. As with other PEM fuel cells, it is generally ad-exchange membrane (PEM) fuel cell performance, utilizing

Parra, Erika Andrea

2010-01-01T23:59:59.000Z

357

Fuel Cells Get New BFF | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuel Cells Get New BFF Fuel Cells Get New BFF Artificial diamonds may lead to affordable, efficient fuel cells Oxygen (red spheres) migrates from one vacancy to another inside the...

358

Microfluidic Microbial Fuel Cells for Microstructure Interrogations  

E-Print Network [OSTI]

5 FutureWork 5.1 Microfluidic Microbial Fuel Cell ContinuedModel of hydrogen fuel cell kinetic losses includingSediment microbial fuel cells demonstrating marine (left)

Parra, Erika Andrea

2010-01-01T23:59:59.000Z

359

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network [OSTI]

M. A. (1992). Hydrogen Fuel-Cell Vehicles. Re- koebensteinthan both. Solar-hydrogen and fuel-cell vehicles wouldberegulation. Solar-Hydrogen Fuel-Cell Vehicles MarkA. DeLuchi

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

360

Abrupt Decline in the Open-Circuit Voltage of Direct Methanol Fuel Cells at Critical Oxygen Feed Rate  

E-Print Network [OSTI]

Abrupt Decline in the Open-Circuit Voltage of Direct Methanol Fuel Cells at Critical Oxygen Feed and Technology, Clear Water Bay, Kowloon, Hong Kong, China The open-circuit voltage OCV of a direct methanol fuel cell DMFC was measured by varying the cathode oxygen flow rate OFR while keeping the methanol

Zhao, Tianshou

Note: This page contains sample records for the topic "fuel cell cathode" 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

Evaluation of Stationary Fuel Cell Deployments, Costs, and Fuels (Presentation)  

SciTech Connect (OSTI)

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

362

Hydrogen, Fuel Cells and Infrastructure Technologies Program...  

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

Hydrogen, Fuel Cells and Infrastructure Technologies Program FY2003 Merit Review and Peer Evaluation Report Hydrogen, Fuel Cells and Infrastructure Technologies Program FY2003...

363

Webinar: National Fuel Cell Technology Evaluation Center  

Broader source: Energy.gov [DOE]

Video recording and text version of the Fuel Cell Technologies Office webinar titled "National Fuel Cell Technology Evaluation Center (NFCTEC)," originally presented on March 11, 2014.

364

Fuel Cell Technology Challenges | Department of Energy  

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

Technology Challenges Fuel Cell Technology Challenges Cost and durability are the major challenges to fuel cell commercialization. However, hurdles vary according to the...

365

Webinar: Advanced Electrocatalysts for PEM Fuel Cells  

Broader source: Energy.gov [DOE]

Video recording of the Fuel Cell Technologies Office webinar, Advanced Electrocatalysts for PEM Fuel Cells, originally presented on February 12, 2013.

366

Canadian Fuel Cell Commercialization Roadmap Update: Progress...  

Open Energy Info (EERE)

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

367

Fuel Cell Animation- Chemical Process (Text Version)  

Broader source: Energy.gov [DOE]

This text version of the fuel cell animation demonstrates how a fuel cell uses hydrogen to produce electricity, with only water and heat as byproducts.

368

Characterization of Fuel-Cell Diffusion Media  

E-Print Network [OSTI]

47 Figure 4.2 CV of PEM fuel-cell CL that shows hydrogencurrent. Figure 4.2. CV of PEM fuel-cell catalyst layer that

Gunterman, Haluna Penelope Frances

2011-01-01T23:59:59.000Z

369

Market Transformation: Fuel Cell Early Adoption (Presentation...  

Office of Environmental Management (EM)

Fuel Cell Technologies Office Hydrogen Production Hydrogen Delivery Hydrogen Storage Fuel Cells Technology Validation Manufacturing Safety, Codes, and Standards Education Market...

370

Hydrogen and Fuel Cells | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Transportation Hydrogen and Fuel Cells Hydrogen and Fuel Cells EERE leads U.S. researchers and other partners in making transportation cleaner and more efficient through...

371

Fuel Cell & Hydrogen Technologies | Clean Energy | ORNL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuel Cell Technologies SHARE Fuel Cell and Hydrogen Technologies Oak Ridge National Laboratory pursues activities that address the barriers facing the development and deployment of...

372

Hydrogen, Fuel Cells and Infrastructure Technologies Program...  

Broader source: Energy.gov (indexed) [DOE]

Hydrogen, Fuel Cells and Infrastructure Technologies Program: 2002 Annual Progress Report Hydrogen, Fuel Cells and Infrastructure Technologies Program: 2002 Annual Progress Report...

373

Heel and toe driving on fuel cell vehicle  

DOE Patents [OSTI]

A system and method for providing nearly instantaneous power in a fuel cell vehicle. The method includes monitoring the brake pedal angle and the accelerator pedal angle of the vehicle, and if the vehicle driver is pressing both the brake pedal and the accelerator pedal at the same time and the vehicle is in a drive gear, activating a heel and toe mode. When the heel and toe mode is activated, the speed of a cathode compressor is increased to a predetermined speed set-point, which is higher than the normal compressor speed for the pedal position. Thus, when the vehicle brake is removed, the compressor speed is high enough to provide enough air to the cathode, so that the stack can generate nearly immediate power.

Choi, Tayoung; Chen, Dongmei

2012-12-11T23:59:59.000Z

374

Microbial fuel cell treatment of ethanol fermentation process water  

DOE Patents [OSTI]

The present invention relates to a method for removing inhibitor compounds from a cellulosic biomass-to-ethanol process which includes a pretreatment step of raw cellulosic biomass material and the production of fermentation process water after production and removal of ethanol from a fermentation step, the method comprising contacting said fermentation process water with an anode of a microbial fuel cell, said anode containing microbes thereon which oxidatively degrade one or more of said inhibitor compounds while producing electrical energy or hydrogen from said oxidative degradation, and wherein said anode is in electrical communication with a cathode, and a porous material (such as a porous or cation-permeable membrane) separates said anode and cathode.

Borole, Abhijeet P. (Knoxville, TN)

2012-06-05T23:59:59.000Z

375

Secondary cell with orthorhombic alkali metal/manganese oxide phase active cathode material  

DOE Patents [OSTI]

An alkali metal manganese oxide secondary cell is disclosed which can provide a high rate of discharge, good cycling capabilities, good stability of the cathode material, high specific energy (energy per unit of weight) and high energy density (energy per unit volume). The active material in the anode is an alkali metal and the active material in the cathode comprises an orthorhombic alkali metal manganese oxide which undergoes intercalation and deintercalation without a change in phase, resulting in a substantially linear change in voltage with change in the state of charge of the cell. The active material in the cathode is an orthorhombic structure having the formula M{sub x}Z{sub y}Mn{sub (1{minus}y)}O{sub 2}, where M is an alkali metal; Z is a metal capable of substituting for manganese in the orthorhombic structure such as iron, cobalt or titanium; x ranges from about 0.2 in the fully charged state to about 0.75 in the fully discharged state, and y ranges from 0 to 60 atomic %. Preferably, the cell is constructed with a solid electrolyte, but a liquid or gelatinous electrolyte may also be used in the cell. 11 figs.

Doeff, M.M.; Peng, M.Y.; Ma, Y.; Visco, S.J.; DeJonghe, L.C.

1996-09-24T23:59:59.000Z

376
377

The Business Case for Fuel Cells 2012 America's Partner in Power  

E-Print Network [OSTI]

................................................................................................................... 5 Fuel Cells + Biogas...

378

Solid oxide fuel cell with multi-unit construction and prismatic design  

DOE Patents [OSTI]

A single cell unit of a solid oxide fuel cell is described that is individually fabricated and sintered prior to being connected to adjacent cells to form a solid oxide fuel cell. The single cell unit is comprised of a shaped anode sheet positioned between a flat anode sheet and an anode-electrolyte-cathode (A/E/C) sheet, and a shaped cathode sheet positioned between the A/E/C sheet and a cathode-interconnect-anode (C/I/A) sheet. An alternate embodiment comprises a shaped cathode sheet positioned between an A/E/C sheet and a C/I/A sheet. The shaped sheets form channels for conducting reactant gases. Each single cell unit is individually sintered to form a finished sub-assembly. The finished sub-assemblies are connected in electrical series by interposing connective material between the end surfaces of adjacent cells, whereby individual cells may be inspected for defects and interchanged with non-defective single cell units. 7 figs.

McPheeters, C.C.; Dees, D.W.; Myles, K.M.

1999-03-16T23:59:59.000Z

379

Solid oxide fuel cell with multi-unit construction and prismatic design  

DOE Patents [OSTI]

A single cell unit of a solid oxide fuel cell that is individually fabricated and sintered prior to being connected to adjacent cells to form a solid oxide fuel cell. The single cell unit is comprised of a shaped anode sheet positioned between a flat anode sheet and an anode-electrolyte-cathode (A/E/C) sheet, and a shaped cathode sheet positioned between the A/E/C sheet and a cathode-interconnect-anode (C/I/A) sheet. An alternate embodiment comprises a shaped cathode sheet positioned between an A/E/C sheet and a C/I/A sheet. The shaped sheets form channels for conducting reactant gases. Each single cell unit is individually sintered to form a finished sub-assembly. The finished sub-assemblies are connected in electrical series by interposing connective material between the end surfaces of adjacent cells, whereby individual cells may be inspected for defects and interchanged with non-defective single cell units.

McPheeters, Charles C. (Naperville, IL); Dees, Dennis W. (Downers Grove, IL); Myles, Kevin M. (Downers Grove, IL)

1999-01-01T23:59:59.000Z

380

Fuel reforming for fuel cell application.  

E-Print Network [OSTI]

??Fossil fuels, such as natural gas, petroleum, and coal are currently the primary source of energy that drives the world economy. However, fossil fuel is… (more)

Hung, Tak Cheong

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

A polymer electrolyte fuel cell stack for stationary power generation from hydrogen fuel  

SciTech Connect (OSTI)

The fuel cell is the most efficient device for the conversion of hydrogen fuel to electric power. As such, the fuel cell represents a key element in efforts to demonstrate and implement hydrogen fuel utilization for electric power generation. A central objective of a LANL/Industry collaborative effort supported by the Hydrogen Program is to integrate PEM fuel cell and novel stack designs at LANL with stack technology of H-Power Corporation (H-Power) in order to develop a manufacturable, low-cost/high-performance hydrogen/air fuel cell stack for stationary generation of electric power. A LANL/H-Power CRADA includes Tasks ranging from exchange, testing and optimization of membrane-electrode assemblies of large areas, development and demonstration of manufacturable flow field, backing and bipolar plate components, and testing of stacks at the 3-5 cell level and, finally, at the 4-5 kW level. The stack should demonstrate the basic features of manufacturability, overall low cost and high energy conversion efficiency. Plans for future work are to continue the CRADA work along the time line defined in a two-year program, to continue the LANL activities of developing and testing stainless steel hardware for longer term stability including testing in a stack, and to further enhance air cathode performance to achieve higher energy conversion efficiencies as required for stationary power application.

Zawodzinski, C.; Wilson, M.; Gottesfeld, S. [Los Alamos National Lab., NM (United States)

1996-10-01T23:59:59.000Z

382

Development of alkaline fuel cells.  

SciTech Connect (OSTI)

This project focuses on the development and demonstration of anion exchange membrane (AEM) fuel cells for portable power applications. Novel polymeric anion exchange membranes and ionomers with high chemical stabilities were prepared characterized by researchers at Sandia National Laboratories. Durable, non-precious metal catalysts were prepared by Dr. Plamen Atanassov's research group at the University of New Mexico by utilizing an aerosol-based process to prepare templated nano-structures. Dr. Andy Herring's group at the Colorado School of Mines combined all of these materials to fabricate and test membrane electrode assemblies for single cell testing in a methanol-fueled alkaline system. The highest power density achieved in this study was 54 mW/cm2 which was 90% of the project target and the highest reported power density for a direct methanol alkaline fuel cell.

Hibbs, Michael R.; Jenkins, Janelle E.; Alam, Todd Michael; Janarthanan, Rajeswari [Colorado School of Mines, Golden, CO; Horan, James L. [Colorado School of Mines, Golden, CO; Caire, Benjamin R. [Colorado School of Mines, Golden, CO; Ziegler, Zachary C. [Colorado School of Mines, Golden, CO; Herring, Andrew M. [Colorado School of Mines, Golden, CO; Yang, Yuan [Colorado School of Mines, Golden, CO; Zuo, Xiaobing [Argonne National Laboratory, Argonne, IL; Robson, Michael H. [University of New Mexico, Albuquerque, NM; Artyushkova, Kateryna [University of New Mexico, Albuquerque, NM; Patterson, Wendy [University of New Mexico, Albuquerque, NM; Atanassov, Plamen Borissov [University of New Mexico, Albuquerque, NM

2013-09-01T23:59:59.000Z

383

Overview of Fuel Cell Electric Bus Development | Department of...  

Broader source: Energy.gov (indexed) [DOE]

Fuel Cell Electric Bus Development Overview of Fuel Cell Electric Bus Development Presentation slides from the Fuel Cell Technologies Office webinar ""Fuel Cell Buses"" held...

384

Overview of Hydrogen and Fuel Cell Activities: 2011 IPHE Stationary...  

Broader source: Energy.gov (indexed) [DOE]

Overview of Hydrogen and Fuel Cell Activities: 2011 IPHE Stationary Fuel Cell Workshop Overview of Hydrogen and Fuel Cell Activities: 2011 IPHE Stationary Fuel Cell Workshop...

385

Mathematical modeling of solid oxide fuel cells using hydrocarbon fuels  

E-Print Network [OSTI]

Solid oxide fuel cells (SOFCs) are high efficiency conversion devices that use hydrogen or light hydrocarbon (HC) fuels in stationary applications to produce quiet and clean power. While successful, HC-fueled SOFCs face ...

Lee, Won Yong, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

386

Fuel Cell Program 2003 Hydrogen and Fuel Cells Merit Review Meeting  

E-Print Network [OSTI]

Fuel Cell Program 2003 Hydrogen and Fuel Cells Merit Review Meeting Rod Borup, Michael Inbody, Jose in Fuel Cell Reformers #12;Fuel Cell Program Technical Objectives: Examine Fuel Effects on Fuel Processor processor and stack lifetime and durability. · Fuel processor catalyst stability and activity · Evaluate

387

Carbon-based Fuel Cell  

SciTech Connect (OSTI)

The direct use of coal in the solid oxide fuel cell to generate electricity is an innovative concept for power generation. The C-fuel cell (carbon-based fuel cell) could offer significant advantages: (1) minimization of NOx emissions due to its operating temperature range of 700-1000 C, (2) high overall efficiency because of the direct conversion of coal to CO{sub 2}, and (3) the production of a nearly pure CO{sub 2} exhaust stream for the direct CO{sub 2} sequestration. The objective of this project is to determine the technical feasibility of using a highly active anode catalyst in a solid oxide fuel for the direct electrochemical oxidation of coal to produce electricity. Results of this study showed that the electric power generation from Ohio No 5 coal (Lower Kittanning) Seam, Mahoning County, is higher than those of coal gas and pure methane on a solid oxide fuel cell assembly with a promoted metal anode catalyst at 950 C. Further study is needed to test the long term activity, selectivity, and stability of anode catalysts.

Steven S. C. Chuang

2005-08-31T23:59:59.000Z

388

Fuel Cell Applied Research Project  

SciTech Connect (OSTI)

Since November 12, 2003, Northern Alberta Institute of Technology has been operating a 200 kW phosphoric acid fuel cell to provide electrical and thermal energy to its campus. The project was made possible by funding from the U.S. Department of Energy as well as by a partnership with the provincial Alberta Energy Research Institute; a private-public partnership, Climate Change Central; the federal Ministry of Western Economic Development; and local natural gas supplier, ATCO Gas. Operation of the fuel cell has contributed to reducing NAIT's carbon dioxide emissions through its efficient use of natural gas.

Lee Richardson

2006-09-15T23:59:59.000Z

389

DIGESTER GAS - FUEL CELL - PROJECT  

SciTech Connect (OSTI)

GEW has been operating the first fuel cell in Europe producing heat and electricity from digester gas in an environmentally friendly way. The first 9,000 hours in operation were successfully concluded in August 2001. The fuel cell powered by digester gas was one of the 25 registered ''Worldwide projects'' which NRW presented at the EXPO 2000. In addition to this, it is a key project of the NRW State Initiative on Future Energies. All of the activities planned for the first year of operation were successfully completed: installing and putting the plant into operation, the transition to permanent operation as well as extended monitoring till May 2001.

Dr.-Eng. Dirk Adolph; Dipl.-Eng. Thomas Saure

2002-03-01T23:59:59.000Z

390

Improving the lifetime performance of ceramic fuel cells Fuel cells generate electricity from fuels more efficiently and with  

E-Print Network [OSTI]

to the development of low-cost, modular and fuel-flexible solid oxide fuel cell technology. #12;2014 Improving the lifetime performance of ceramic fuel cells Fuel cells generate electricity from fuels more efficiently and with fewer emissions per watt than burning fossil fuels. But as fuel cells

Rollins, Andrew M.

391

Corrugated Membrane Fuel Cell Structures  

SciTech Connect (OSTI)

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

392

Use of Alternative Fuels in Solid Oxide Fuel Cells Fuel Cells and Solid State Chemistry Department, Ris National Laboratory, Technical  

E-Print Network [OSTI]

Use of Alternative Fuels in Solid Oxide Fuel Cells Anke Hagen Fuel Cells and Solid State Chemistry on a variety of environmentally benign energy production technologies. Fuel cells can be a key element in this scenario. One of the fuel cells types ­ the solid oxide fuel cell (SOFC) ­ has a number of advantages

393

Solid oxide fuel cell systems with hot zones having improved reactant distribution  

DOE Patents [OSTI]

A Solid Oxide Fuel Cell (SOFC) system having a hot zone with a center cathode air feed tube for improved reactant distribution, a CPOX reactor attached at the anode feed end of the hot zone with a tail gas combustor at the opposing end for more uniform heat distribution, and a counter-flow heat exchanger for efficient heat retention.

Poshusta, Joseph C.; Booten, Charles W.; Martin, Jerry L.

2012-11-06T23:59:59.000Z

394

Solid oxide fuel cell systems with hot zones having improved reactant distribution  

DOE Patents [OSTI]

A Solid Oxide Fuel Cell (SOFC) system having a hot zone with a center cathode air feed tube for improved reactant distribution, a CPOX reactor attached at the anode feed end of the hot zone with a tail gas combustor at the opposing end for more uniform heat distribution, and a counter-flow heat exchanger for efficient heat retention.

Poshusta, Joseph C; Booten, Charles W; Martin, Jerry L

2013-12-24T23:59:59.000Z

395

DOE Fuel Cell Subprogram Nancy Garland  

E-Print Network [OSTI]

hydrogen fuel cell power system at a cost of $45/kW with 5000 hours of durability (80°C); by 2015, a cost a distributed generation PEM fuel cell system operating on natural gas or LPG that achieves 40% electricalDOE Fuel Cell Subprogram Nancy Garland Acting Fuel Cell Team Leader Pre-Solicitation Meeting Golden

396

FUEL CELL TECHNOLOGIES PROGRAM Safety, Codes, and  

E-Print Network [OSTI]

. Many odorants can also contaminate fuel cells. Hydrogen burns very quickly. Under optimal combustionFUEL CELL TECHNOLOGIES PROGRAM Safety, Codes, and Standards Hydrogen and fuel cell technologies, nuclear, natural gas, and coal with carbon sequestration. Fuel cells provide a highly efficient means

397

2008 FUEL CELL TECHNOLOGIES MARKET REPORT  

E-Print Network [OSTI]

2008 FUEL CELL TECHNOLOGIES MARKET REPORT JUNE 2010 #12;2008 FUEL CELL TECHNOLOGIES MARKET REPORT i and the fuel cell industry. The authors especially wish to thank Sunita Satyapal, Nancy Garland, and the staff of the U.S. Department of Energy's Fuel Cell Technologies Program for their support and guidance

398

Water reactive hydrogen fuel cell power system  

DOE Patents [OSTI]

A water reactive hydrogen fueled power system includes devices and methods to combine reactant fuel materials and aqueous solutions to generate hydrogen. The generated hydrogen is converted in a fuel cell to provide electricity. The water reactive hydrogen fueled power system includes a fuel cell, a water feed tray, and a fuel cartridge to generate power for portable power electronics. The removable fuel cartridge is encompassed by the water feed tray and fuel cell. The water feed tray is refillable with water by a user. The water is then transferred from the water feed tray into the fuel cartridge to generate hydrogen for the fuel cell which then produces power for the user.

Wallace, Andrew P; Melack, John M; Lefenfeld, Michael

2014-11-25T23:59:59.000Z

399

Water reactive hydrogen fuel cell power system  

DOE Patents [OSTI]

A water reactive hydrogen fueled power system includes devices and methods to combine reactant fuel materials and aqueous solutions to generate hydrogen. The generated hydrogen is converted in a fuel cell to provide electricity. The water reactive hydrogen fueled power system includes a fuel cell, a water feed tray, and a fuel cartridge to generate power for portable power electronics. The removable fuel cartridge is encompassed by the water feed tray and fuel cell. The water feed tray is refillable with water by a user. The water is then transferred from the water feed tray into a fuel cartridge to generate hydrogen for the fuel cell which then produces power for the user.

Wallace, Andrew P; Melack, John M; Lefenfeld, Michael

2014-01-21T23:59:59.000Z

400

2009 Fuel Cell Market Report, November 2010  

SciTech Connect (OSTI)

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 fuel is supplied. Moreover, fuel cells do not burn fuel, making the process quiet, pollution-free and two to three times more efficient than combustion. Fuel cell systems can be a truly zero-emission source of electricity, if the hydrogen is produced from non-polluting sources. Global concerns about climate change, energy security, and air pollution are driving demand for fuel cell technology. More than 630 companies and laboratories in the United States are investing $1 billion a year in fuel cells or fuel cell component technologies. This report provides an overview of trends in the fuel cell industry and markets, including product shipments, market development, and corporate performance. It also provides snapshots of select fuel cell companies, including general.

Not Available

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

Using cathode spacers to minimize reactor size in air cathode microbial fuel cells Qiao Yang a  

E-Print Network [OSTI]

be increased through the incorporation of reverse electrodialysis stacks into the system (Kim and Logan, 2011

402

Solid Oxide Fuel Cell Systems PVL Line  

SciTech Connect (OSTI)

In July 2010, Stark State College (SSC), received Grant DE-EE0003229 from the U.S. Department of Energy (DOE), Golden Field Office, for the development of the electrical and control systems, and mechanical commissioning of a unique 20kW scale high-pressure, high temperature, natural gas fueled Stack Block Test System (SBTS). SSC worked closely with subcontractor, Rolls-Royce Fuel Cell Systems (US) Inc. (RRFCS) over a 13 month period to successfully complete the project activities. This system will be utilized by RRFCS for pre-commercial technology development and training of SSC student interns. In the longer term, when RRFCS is producing commercial products, SSC will utilize the equipment for workforce training. In addition to DOE Hydrogen, Fuel Cells, and Infrastructure Technologies program funding, RRFCS internal funds, funds from the state of Ohio, and funding from the DOE Solid State Energy Conversion Alliance (SECA) program have been utilized to design, develop and commission this equipment. Construction of the SBTS (mechanical components) was performed under a Grant from the State of Ohio through Ohio's Third Frontier program (Grant TECH 08-053). This Ohio program supported development of a system that uses natural gas as a fuel. Funding was provided under the Department of Energy (DOE) Solid-state Energy Conversion Alliance (SECA) program for modifications required to test on coal synthesis gas. The subject DOE program provided funding for the electrical build, control system development and mechanical commissioning. Performance testing, which includes electrical commissioning, was subsequently performed under the DOE SECA program. Rolls-Royce Fuel Cell Systems is developing a megawatt-scale solid oxide fuel cell (SOFC) stationary power generation system. This system, based on RRFCS proprietary technology, is fueled with natural gas, and operates at elevated pressure. A critical success factor for development of the full scale system is the capability to test fuel cell components at a scale and under conditions that can be accurately extrapolated to full system performance. This requires specially designed equipment that replicates the pressure (up to 6.5 bara), temperature (about 910 C), anode and cathode gas compositions, flows and power generation density of the full scale design. The SBTS fuel cell anode gas is produced through the reaction of pipeline natural gas with a mixture of steam, CO2, and O2 in a catalytic partial oxidation (CPOX) reactor. Production of the fuel cell anode gas in this manner provides the capability to test a fuel cell with varying anode gas compositions ranging from traditional reformed natural gas to a coal-syngas surrogate fuel. Stark State College and RRFCS have a history of collaboration. This is based upon SSCAs commitment to provide students with skills for advanced energy industries, and RRFCS need for a workforce that is skilled in high temperature fuel cell development and testing. A key to this approach is the access of students to unique SOFC test and evaluation equipment. This equipment is designed and developed by RRFCS, with the participation of SSC interns. In the near-term, the equipment will be used by RRFCS for technology development. When this stage is completed, and RRFCS has moved to commercial products, SSC will utilize this equipment for workforce training. The RRFCS fuel cell design is based upon a unique ceramic substrate architecture in which a porous, flat substrate (tube) provides the support structure for a network of solid oxide fuel cells that are electrically connected in series. These tubes are grouped into a {approx}350-tube repeat configuration, called a stack/block. Stack/block testing, performed at system conditions, provides data that can be confidently scaled to full scale performance. This is the basis for the specially designed and developed test equipment that is required for advancing and accelerating the RRFCS SOFC power system development program. All contract DE-EE0003229 objectives were achieved and deliverables completed during the peri

Susan Shearer - Stark State College; Gregory Rush - Rolls-Royce Fuel Cell Systems

2012-05-01T23:59:59.000Z

403

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.

Fronk, Matthew Howard (Honeoye Falls, NY); Borup, Rodney Lynn (East Rochester, NY); Hulett, Jay S. (Rochester, NY); Brady, Brian K. (North Chili, NY); Cunningham, Kevin M. (Romeo, MI)

2002-01-01T23:59:59.000Z

404

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.

Fronk, Matthew Howard (Honeoye Falls, NY); Borup, Rodney Lynn (East Rochester, NY); Hulett, Jay S. (Rochester, NY); Brady, Brian K. NY); Cunningham, Kevin M. (Romeo, MI)

2011-06-07T23:59:59.000Z

405

Fuel Cell Technologies Program Overview  

E-Print Network [OSTI]

per kW, 5,000-hr durability Hydrogen Cost Technology Validation: Technologies Techno Barri y g. Benefits · Efficiencies can be 60% (electrical) and 3 60% (electrical) and 85% (with CHP) · > 90% reduction (> 40% increase over 2008) Fuel cells can be a cost-competitive option for critical

406

Fuel Cell Systems Air Management  

E-Print Network [OSTI]

Targets Compressor/Expander for Transportation Fuel Cell System 400--$Cost 10-1510-155Turndown Ratio 15 compressor/expander units for direct hydrogen systems. · Need exists for compressor/ expander motor unit hydrogen 500020001000HoursDurability 45125325$/kWCost 325250140W/LPower density Operating on Tier 2

407

1990 fuel cell seminar: Program and abstracts  

SciTech Connect (OSTI)

This volume contains author prepared short resumes of the presentations at the 1990 Fuel Cell Seminar held November 25-28, 1990 in Phoenix, Arizona. Contained herein are 134 short descriptions organized into topic areas entitled An Environmental Overview, Transportation Applications, Technology Advancements for Molten Carbonate Fuel Cells, Technology Advancements for Solid Fuel Cells, Component Technologies and Systems Analysis, Stationary Power Applications, Marine and Space Applications, Technology Advancements for Acid Type Fuel Cells, and Technology Advancement for Solid Oxide Fuel Cells.

Not Available

1990-12-31T23:59:59.000Z

408

Breaking the Fuel Cell Cost Barrier  

Broader source: Energy.gov (indexed) [DOE]

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...

409

Cassettes for solid-oxide fuel cell stacks and methods of making the same  

DOE Patents [OSTI]

Solid-oxide fuel cell (SOFC) stack assembly designs are consistently investigated to develop an assembly that provides optimal performance, and durability, within desired cost parameters. A new design includes a repeat unit having a SOFC cassette and being characterized by a three-component construct. The three components include an oxidation-resistant, metal window frame hermetically joined to an electrolyte layer of a multi-layer, anode-supported ceramic cell and a pre-cassette including a separator plate having a plurality of vias that provide electrical contact between an anode-side collector within the pre-cassette and a cathode-side current collector of an adjacent cell. The third component is a cathode-side seal, which includes a standoff that supports a cathode channel spacing between each of the cassettes in a stack. Cassettes are formed by joining the pre-cassette and the window frame.

Weil, K. Scott; Meinhardt, Kerry D; Sprenkle, Vincent L

2012-10-23T23:59:59.000Z

410

DEVELOPMENT OF NOVEL ELECTROCATALYSTS FOR PROTON EXCHANGE MEMBRANE FUEL CELLS  

SciTech Connect (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

411

Low contaminant formic acid fuel for direct liquid fuel cell  

DOE Patents [OSTI]

A low contaminant formic acid fuel is especially suited toward use in a direct organic liquid fuel cell. A fuel of the invention provides high power output that is maintained for a substantial time and the fuel is substantially non-flammable. Specific contaminants and contaminant levels have been identified as being deleterious to the performance of a formic acid fuel in a fuel cell, and embodiments of the invention provide low contaminant fuels that have improved performance compared to known commercial bulk grade and commercial purified grade formic acid fuels. Preferred embodiment fuels (and fuel cells containing such fuels) including low levels of a combination of key contaminants, including acetic acid, methyl formate, and methanol.

Masel, Richard I. (Champaign, IL); Zhu, Yimin (Urbana, IL); Kahn, Zakia (Palatine, IL); Man, Malcolm (Vancouver, CA)

2009-11-17T23:59:59.000Z

412

Investigation of Fuel Cell System Performance and Operation: A Fuel Cell as a Practical  

E-Print Network [OSTI]

Investigation of Fuel Cell System Performance and Operation: A Fuel Cell as a Practical Distributed of Fuel Cell System Performance and Operation: A Fuel Cell as a Practical Distributed Generator George Research Center program. This report is of work done under the PSERC project "Investigation of Fuel Cell

413

1 | Fuel Cell Technologies Office eere.energy.gov DOE Fuel Cell Technologies Office  

E-Print Network [OSTI]

Storage Engineering Center of Excellence 2013 ·H2USA Launch DOE Fuel Cell Technologies ­ Recent History1 | Fuel Cell Technologies Office eere.energy.gov DOE Fuel Cell Technologies Office Fuel Cell Seminar & Energy Exposition Columbus, Ohio Dr. Sunita Satyapal Director Fuel Cell Technologies Office

414

1 | Fuel Cell Technologies Program eere.energy.gov Fuel Cell Technologies Program  

E-Print Network [OSTI]

, and Specialty Vehicles Fuel cells can be a cost-competitive option for critical-load facilities, backup power1 | Fuel Cell Technologies Program eere.energy.gov Fuel Cell Technologies Program DOE Hydrogen & Fuel Cell Overview Dr. Sunita Satyapal Program Manager U.S. Department of Energy Fuel Cell Technologies

415

Automotive Fuel Processor Development and Demonstration with Fuel Cell Systems  

SciTech Connect (OSTI)

The potential for fuel cell systems to improve energy efficiency and reduce emissions over conventional power systems has generated significant interest in fuel cell technologies. While fuel cells are being investigated for use in many applications such as stationary power generation and small portable devices, transportation applications present some unique challenges for fuel cell technology. Due to their lower operating temperature and non-brittle materials, most transportation work is focusing on fuel cells using proton exchange membrane (PEM) technology. Since PEM fuel cells are fueled by hydrogen, major obstacles to their widespread use are the lack of an available hydrogen fueling infrastructure and hydrogen's relatively low energy storage density, which leads to a much lower driving range than conventional vehicles. One potential solution to the hydrogen infrastructure and storage density issues is to convert a conventional fuel such as gasoline into hydrogen onboard the vehicle using a fuel processor. Figure 2 shows that gasoline stores roughly 7 times more energy per volume than pressurized hydrogen gas at 700 bar and 4 times more than liquid hydrogen. If integrated properly, the fuel processor/fuel cell system would also be more efficient than traditional engines and would give a fuel economy benefit while hydrogen storage and distribution issues are being investigated. Widespread implementation of fuel processor/fuel cell systems requires improvements in several aspects of the technology, including size, startup time, transient response time, and cost. In addition, the ability to operate on a number of hydrocarbon fuels that are available through the existing infrastructure is a key enabler for commercializing these systems. In this program, Nuvera Fuel Cells collaborated with the Department of Energy (DOE) to develop efficient, low-emission, multi-fuel processors for transportation applications. Nuvera's focus was on (1) developing fuel processor subsystems (fuel reformer, CO cleanup, and exhaust cleanup) that were small enough to integrate on a vehicle and (2) evaluating the fuel processor system performance for hydrogen production, efficiency, thermal integration, startup, durability and ability to integrate with fuel cells. Nuvera carried out a three-part development program that created multi-fuel (gasoline, ethanol, natural gas) fuel processing systems and investigated integration of fuel cell / fuel processor systems. The targets for the various stages of development were initially based on the goals of the DOE's Partnership for New Generation Vehicles (PNGV) initiative and later on the Freedom Car goals. The three parts are summarized below with the names based on the topic numbers from the original Solicitation for Financial Assistance Award (SFAA).

Nuvera Fuel Cells

2005-04-15T23:59:59.000Z

416

Analysis of Fuel Cell Systems Rangan Banerjee  

E-Print Network [OSTI]

Analysis of Fuel Cell Systems Rangan Banerjee Energy Systems Engineering IIT Bombay Lecture in CEP Course on `Fuel Cell' at IIT 14th November 2007 #12;Overview of Talk Energy Crisis ­ Motivation for fuel biological Hydrogen Gasification Fermentation Cracking + Shift Reaction Fuel Cell #12;ENERGY FLOW DIAGRAM

Banerjee, Rangan

417

Connecticut Fuel Cell Activities: Markets, Programs, & Models  

E-Print Network [OSTI]

· Connecticut DOT Plan for Hydrogen Stations and Zero Emission Fuel Cell Vehicles (In Development) · Renewable) Passenger Car Light Truck Transit Bus Hydrogen Fuel Cell Gasoline Powered Car Hydrogen Fuel Cell Gasoline fleets, delivery fleets, major highway fueling stations, etc. Connecticut Hydrogen Roadmap #12;9 9

418

Low Temperature PEM Fuel Cell Manufacturing Needs  

E-Print Network [OSTI]

Low Temperature PEM Fuel Cell Manufacturing Needs Presented by Duarte Sousa, PE Manufacturing Fuel Cell Manhattan Project #12; 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

419

CONTROL OF FUEL CELLS Federico Zenith  

E-Print Network [OSTI]

CONTROL OF FUEL CELLS Federico Zenith Department of Chemical Engineering Norwegian University of Science and Technology Trondheim, June 29, 2007 WWW.NTNU.NO FEDERICO ZENITH, CONTROL OF FUEL CELLS #12 STACK TEMPERATURE CONTROL WWW.NTNU.NO FEDERICO ZENITH, CONTROL OF FUEL CELLS #12;3 INTRODUCTION Fuel

Skogestad, Sigurd

420

Distributed/Stationary Fuel Cell Systems | Department of Energy  

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

DistributedStationary Fuel Cell Systems DistributedStationary Fuel Cell Systems Photo of stationary fuel cell The Department of Energy (DOE) is developing high-efficiency fuel...

Note: This page contains sample records for the topic "fuel cell cathode" 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

Moving toward a commercial market for hydrogen fuel cell vehicles...  

Energy Savers [EERE]

Moving toward a commercial market for hydrogen fuel cell vehicles Moving toward a commercial market for hydrogen fuel cell vehicles Fuel cell vehicles and fueling stations...

422

Overview of DOE Hydrogen and Fuel Cell Activities: 2010 Gordon...  

Energy Savers [EERE]

DOE Hydrogen and Fuel Cell Activities: 2010 Gordon Research Conference on Fuel Cells Overview of DOE Hydrogen and Fuel Cell Activities: 2010 Gordon Research Conference on Fuel...

423

Overview of Hydrogen and Fuel Cell Activities: February 2011...  

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

and Fuel Cell Activities: February 2011 Hydrogen and Fuel Cell Technical Advisory Committee Meeting Overview of Hydrogen and Fuel Cell Activities: February 2011 Hydrogen and Fuel...

424

Fuel Cell Seminar, 1992: Program and abstracts  

SciTech Connect (OSTI)

This year`s theme, ``Fuel Cells: Realizing the Potential,`` focuses on progress being made toward commercial manufacture and use of fuel cell products. Fuel cell power plants are competing for market share in some applications and demonstrations of market entry power plants are proceeding for additional applications. Development activity on fuel cells for transportation is also increasing; fuel cell products have potential in energy and transportation industries, with very favorable environmental impacts. This Seminar has the purpose of fostering communication by providing a forum for the international community interested in development, application, and business opportunities related fuel cells. Over 190 technical papers are included, the majority being processed for the data base.

Not Available

1992-12-31T23:59:59.000Z

425

DEVELOPMENT OF NOVEL ELECTROCATALYSTS FOR PROTON EXCHANGE MEMBRANE FUEL CELLS  

SciTech Connect (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

426

Fuel Cell R&D Activities | Department of Energy  

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

Fuel Cell R&D Activities Fuel Cell R&D Activities Photo of electric motor under the hood of fuel cell car The Fuel Cell Technologies fuel cell research and development (R&D)...

427

Fuel Cell Technologies Office Multi-Year Research, Development...  

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

3.4 Fuel Cells Fuel Cell Technologies Office Multi-Year Research, Development, and Demonstration Plan - 3.4 Fuel Cells Fuel Cells technical plan section of the Fuel Cell...

428

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 number1009). for an automotive PEM fuel cell system with imbedded

Zhao, Hengbing; Burke, Andy

2008-01-01T23:59:59.000Z

429

Webinar: California Fuel Cell Partnership's Roadmap to the Commercialization of Hydrogen Fuel Cell Electric Vehicles  

Broader source: Energy.gov [DOE]

Video recording of the Fuel Cell Technologies Office webinar, California Fuel Cell Partnership's Roadmap to the Commercialization of Hydrogen Fuel Cell Electric Vehicles, originally presented on October 16, 2013.

430

Tungsten Cathode Catalyst for PEMFC  

SciTech Connect (OSTI)

Final report for project to evaluate tungsten-based catalyst as a cathode catalyst for PEM cell applications.

Joel B. Christian; Sean P. E. Smith

2006-09-22T23:59:59.000Z

431

Solid oxide fuel cell having compound cross flow gas patterns  

DOE Patents [OSTI]

A core construction for a fuel cell is disclosed having both parallel and cross flow passageways for the fuel and the oxidant gases. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte wall consists of cathode and anode materials sandwiching an electrolyte material. Each interconnect wall is formed as a sheet of inert support material having therein spaced small plugs of interconnect material, where cathode and anode materials are formed as layers on opposite sides of each sheet and are electrically connected together by the interconnect material plugs. Each interconnect wall in a wavy shape is connected along spaced generally parallel line-like contact areas between corresponding spaced pairs of generally parallel electrolyte walls, operable to define one tier of generally parallel flow passageways for the fuel and oxidant gases. Alternate tiers are arranged to have the passageways disposed normal to one another. Solid mechanical connection of the interconnect walls of adjacent tiers to the opposite sides of the common electrolyte wall therebetween is only at spaced point-like contact areas, 90 where the previously mentioned line-like contact areas cross one another.

Fraioli, A.V.

1983-10-12T23:59:59.000Z

432

In situ PEM fuel cell water measurements  

SciTech Connect (OSTI)

Efficient PEM fuel cell performance requires effective water management. The materials used, their durability, and the operating conditions under which fuel cells run, make efficient water management within a practical fuel cell system a primary challenge in developing commercially viable systems. We present experimental measurements of water content within operating fuel cells. in response to operational conditions, including transients and freezing conditions. To help understand the effect of components and operations, we examine water transport in operating fuel cells, measure the fuel cell water in situ and model the water transport within the fuel cell. High Frequency Resistance (HFR), AC Impedance and Neutron imaging (using NIST's facilities) were used to measure water content in operating fuel cells with various conditions, including current density, relative humidity, inlet flows, flow orientation and variable GDL properties. Ice formation in freezing cells was also monitored both during operation and shut-down conditions.

Borup, Rodney L [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory; Davey, John R [Los Alamos National Laboratory; Spendalow, Jacob S [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

433

Overview of Hydrogen and Fuel Cell Activities: 2011 IPHE Stationary...  

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

Cell Activities: 2011 IPHE Stationary Fuel Cell Workshop Overview of Hydrogen and Fuel Cell Activities: 2011 IPHE Stationary Fuel Cell Workshop Presentation by Rick Farmer at the...

434

1 | Fuel Cell Technologies Program eere.energy.gov Fuel Cell Technologies Program  

E-Print Network [OSTI]

fuel cell vehicles ~ 20 active fuel cell buses ~ 60 fueling stations In the U.S., there are currently Power, Auxiliary Power, and Specialty Vehicles Fuel cells can be a cost-competitive option for critical the world signed a letter of understanding supporting fuel cell vehicles in anticipation of widespread

435

Effects of Operating Conditions on Internal Resistances in Enzyme Fuel Cells Studied via Electrochemical Impedance Spectroscopy  

SciTech Connect (OSTI)

Enzyme fuel cells (EFCs) offer some advantages over traditional precious-metal-catalyzed fuel cells, such as polymer electrolyte membrane fuel cells (PEMFCs). However, EFCs exhibit far less power output than PEMFCs and have relatively short life spans before materials must be replaced. In this work, electrochemical impedance spectroscopy (EIS) is used to analyze the internal resistances throughout the EFC at a variety of operating conditions. EIS analysis is focused primarily on the resistances of the anode, solution/membrane, and cathode. Increased enzyme loading results in improved power output and reductions in internal resistance. Conditions are identified for which enzyme loading does not limit the EFC performance. EIS experiments are also reported for EFCs operated continuously for 2 days; power output declines sharply over time, while all internal resistances increase. Drying of the cathode and enzyme/mediator degradation are believed to have contributed to this behavior. Finally, experiments are performed at varying air-humidification temperatures. Little effect on internal resistances or power output is observed. However, it is anticipated that increased air humidification can improve longevity by delivering more water to the cathode. Improvements to the enzymatic cathode are needed for EFC development. These improvements need to focus on improving transport rather than increasing enzyme loading.

Aaron, D [Georgia Institute of Technology; Borole, Abhijeet P [ORNL; Yiacoumi, Sotira [Georgia Institute of Technology; Tsouris, Costas [ORNL

2012-01-01T23:59:59.000Z

436

Carbon Fuel Particles Used in Direct Carbon Conversion Fuel Cells  

DOE Patents [OSTI]

A system for preparing particulate carbon fuel and using the particulate carbon fuel in a fuel cell. Carbon particles are finely divided. The finely dividing carbon particles are introduced into the fuel cell. A gas containing oxygen is introduced into the fuel cell. The finely divided carbon particles are exposed to carbonate salts, or to molten NaOH or KOH or LiOH or mixtures of NaOH or KOH or LiOH, or to mixed hydroxides, or to alkali and alkaline earth nitrates.

Cooper, John F. (Oakland, CA); Cherepy, Nerine (Oakland, CA)

2008-10-21T23:59:59.000Z

437

Carbon fuel particles used in direct carbon conversion fuel cells  

DOE Patents [OSTI]

A system for preparing particulate carbon fuel and using the particulate carbon fuel in a fuel cell. Carbon particles are finely divided. The finely dividing carbon particles are introduced into the fuel cell. A gas containing oxygen is introduced into the fuel cell. The finely divided carbon particles are exposed to carbonate salts, or to molten NaOH or KOH or LiOH or mixtures of NaOH or KOH or LiOH, or to mixed hydroxides, or to alkali and alkaline earth nitrates.

Cooper, John F. (Oakland, CA); Cherepy, Nerine (Oakland, CA)

2011-08-16T23:59:59.000Z

438

Carbon fuel particles used in direct carbon conversion fuel cells  

DOE Patents [OSTI]

A system for preparing particulate carbon fuel and using the particulate carbon fuel in a fuel cell. Carbon particles are finely divided. The finely dividing carbon particles are introduced into the fuel cell. A gas containing oxygen is introduced into the fuel cell. The finely divided carbon particles are exposed to carbonate salts, or to molten NaOH or KOH or LiOH or mixtures of NaOH or KOH or LiOH, or to mixed hydroxides, or to alkali and alkaline earth nitrates.

Cooper, John F. (Oakland, CA); Cherepy, Nerine (Oakland, CA)

2012-01-24T23:59:59.000Z

439

Carbon fuel particles used in direct carbon conversion fuel cells  

DOE Patents [OSTI]

A system for preparing particulate carbon fuel and using the particulate carbon fuel in a fuel cell. Carbon particles are finely divided. The finely dividing carbon particles are introduced into the fuel cell. A gas containing oxygen is introduced into the fuel cell. The finely divided carbon particles are exposed to carbonate salts, or to molten NaOH or KOH or LiOH or mixtures of NaOH or KOH or LiOH, or to mixed hydroxides, or to alkali and alkaline earth nitrates.

Cooper, John F.; Cherepy, Nerine

2012-10-09T23:59:59.000Z

440

Self-humidified proton exchange membrane fuel cells: Operation of larger cells and fuel cell stacks  

SciTech Connect (OSTI)

The PEM fuel cell is promising as the power source for use in mobile and stationary applications primarily because of its high power density, all solid components, and simplicity of operation. For wide acceptability of this power source, its cost has to be competitive with the presently available energy sources. The fuel cell requires continuous humidification during operation as a power source. The humidification unit however, increases fuel cell volume, weight, and therefore decreases its overall power density. Great advantages in terms of further fuel cell simplification can be achieved if the humidification process can be eliminated or minimized. In addition, cost reductions are associated with the case of manufacturing and operation. At BCS Technology we have developed a technology of self-humidified operation of PEM fuel cells based on the mass balance of the reactants and products and the ability of membrane electrode assembly (MEA) to retain water necessary for humidification under the cell operating conditions. The reactants enter the fuel cell chambers without carrying any form of water, whether in liquid or vapor form. Basic principles of self-humidified operation of fuel cells as practiced by BCS Technology, Inc. have been presented previously in literature. Here, we report the operation of larger self-humidified single cells and fuel cell stacks. Fuel cells of areas Up to 100 cm{sup 2} have been operated. We also show the self-humidified operation of fuel cell stacks of 50 and 100 cm{sup 2} electrode areas.

Dhar, H.P.; Lee, J.H.; Lewinski, K.A. [BCS Technology, Inc., Bryan, TX (United States)

1996-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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

2007 Fuel Cell Technologies Market Report  

SciTech Connect (OSTI)

The fuel cell industry, which has experienced continued increases in sales, is an emerging clean energy industry with the potential for significant growth in the stationary, portable, and transportation sectors. Fuel cells produce electricity in a highly efficient electrochemical process from a variety of fuels with low to zero emissions. This report describes data compiled in 2008 on trends in the fuel cell industry for 2007 with some comparison to two previous years. The report begins with a discussion of worldwide trends in units shipped and financing for the fuel cell industry for 2007. It continues by focusing on the North American and U.S. markets. After providing this industry-wide overview, the report identifies trends for each of the major fuel cell applications -- stationary power, portable power, and transportation -- including data on the range of fuel cell technologies -- polymer electrolyte membrane fuel cell (PEMFC), solid oxide fuel cell (SOFC), alkaline fuel cell (AFC), molten carbonate fuel cell (MCFC), phosphoric acid fuel cell (PAFC), and direct-methanol fuel cell (DMFC) -- used for these applications.

McMurphy, K.

2009-07-01T23:59:59.000Z

442

Fuel Quality Issues in Stationary Fuel Cell Systems  

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

Quality Issues in Stationary Fuel Cell Systems ANLCSEFCTFQ-2011-11 Chemical Sciences and Engineering Division Availability of This Report This report is available, at no cost,...

443

Progress in fuel cells for transportation applications  

SciTech Connect (OSTI)

The current and projected states of development of fuel cells are described in terms of availability, performance, and cost. The applicability of various fuel cell types to the transportation application is discussed, and projections of power densities, weights, and volumes of fuel cell systems are made into the early 1990s. Research currently being done to advance fuel cells for vehicular application is described. A summary of near-term design parameters for a fuel cell transit line is given, including bus performance requirements, fuel cell power plant configuration, and battery peaking requirements. The objective of this paper is to determine a fuel cell technology suitable for near-term use as a vehicular power plant. The emphasis of the study is on indirect methanol fuel cell systems.

Murray, H.S.

1986-01-01T23:59:59.000Z

444

BCA Perspective on Fuel Cell APUs  

Broader source: Energy.gov (indexed) [DOE]

Joe Breit BCA Perspective on Associate Technical Fellow Fuel Cell APUs Boeing Commercial Airplanes September 30, 2010 DOD-DOE Fuel Cell APU Workshop The following technical data is...

445

2008 Fuel Cell Technologies 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

446

Fuel Cell Handbook - Seventh Edition (DOE FE)  

Fuel Cell Technologies Publication and Product Library (EERE)

This handbook is a technical explanation of the science of the fuel cell. Descriptions and explanations of the many different types of fuel cells are also included. Explanations of the chemistry, phys

447

New Membranes for PEM Fuel Cells  

Broader source: Energy.gov (indexed) [DOE]

Membranes for PEM Fuel Cells Steve Hamrock 3M Fuel Cell Components Program 3M Center 201-1W-28 St Paul MN 55144 USA HTMWG Meeting 52705 This research was supported in part by the...

448

Regenerative Fuel Cells for Energy Storage  

Broader source: Energy.gov (indexed) [DOE]

1 1 Regenerative Fuel Cells for Energy Storage April 2011 Corky Mittelsteadt April 2011 2 Outline 1. Regenerative Fuel Cells at Giner 2. Regenerative Systems for Energy Storage 1....

449

Webinar: Additive Manufacturing for Fuel Cells  

Broader source: Energy.gov [DOE]

Video recording and text version of the webinar titled "Additive Manufacturing for Fuel Cells," originally presented on February 11, 2014.

450

Webinar: NREL's Fuel Cell Contaminant Database  

Broader source: Energy.gov [DOE]

Video recording and text version of the webinar titled "NREL's Fuel Cell Contaminant Database," originally presented on May 27, 2014.

451

DYNAMIC MODELING PROTON EXCHANGE MEMBRANE FUEL CELL  

E-Print Network [OSTI]

DYNAMIC MODELING PROTON EXCHANGE MEMBRANE FUEL CELL OVERVIEW Current/Completed Plug Power reformer from GE · Use of GenCore to investigate effects of fuel quality and dynamic changes in fuel to garner SCAQMD funding for fuel cell testing GenCore system is sensitive to diluents · As built design

Mease, Kenneth D.

452

FUEL CELL TECHNOLOGIES PROGRAM Small Business  

E-Print Network [OSTI]

FUEL CELL TECHNOLOGIES PROGRAM Small Business Innovation Research (SBIR) Award Success Story Fuel up to 90 MW per year with full utilization. FuelCell Energy has received Small Business Innovation compression at fueling stations. However in the short term, EHCs can be used to compress hydro

453

Microbial Fuel Cell Using Inexpensive Materials  

E-Print Network [OSTI]

Microbial Fuel Cell Using Inexpensive Materials Group #4 Peter McAveney Brett Pedersen Jun-Chung Wong #12;Abstract We built and tested a microbial fuel cell using low-cost materials. Our intention- critical applications such as transportation. Microbial fuel cells cannot achieve comparable power

454

DOE Hydrogen, Fuel Cells, and Infrastructure Technologies  

E-Print Network [OSTI]

: Economic Analysis of Stationary PEM Fuel Cell Systems · Harry Stone, Economist and Principal Investigator. #12;8 Skill Set ­ Models (Battelle) Battelle Team: Economic Analysis of Stationary PEM Fuel Cell Systems Economic analysis of stationary fuel cells and their associated markets to understand the cost

455

Early Markets: Fuel Cells for Material  

E-Print Network [OSTI]

lift trucks, pallet jacks, and stock pickers. MHE can use Polymer Electrolyte Membrane (PEM) fuel cell. Fuel cell powered lift trucks can reduce the labor cost of refueling/recharging by up to 80 be cost-competitive with batteries on a lifecycle basis. Additionally, fuel cells are currently eligible

456

Solar-Hydrogen Fuel-Cell Vehicles  

E-Print Network [OSTI]

is ter for PEM fuel cells: thinner membranes cost less andPEM fuel cells, the extra yearly mineproduc- ciency, environmental impacts and Iife-cycle costcost air-separation or COz- removal methods are found, alkaline fuel cells could prove to be superior to PEM

DeLuchi, Mark A.; Ogden, Joan M.

1993-01-01T23:59:59.000Z

457

April 2011 1 Regenerative Fuel Cells  

E-Print Network [OSTI]

. Economics 2. Electrolyzer Optimization 3. Fuel Cell Optimization 4. What to do with O2? 5. High Pressure Storage 1. Economics 2. Electrolyzer Optimization 3. Fuel Cell Optimization 4. What to do with O2? 5. HighApril 2011 1 Regenerative Fuel Cells for Energy Storage April 2011 Corky Mittelsteadt #12;April

458

2010 FUEL CELL TECHNOLOGIES MARKET REPORT  

E-Print Network [OSTI]

2010 FUEL CELL TECHNOLOGIES MARKET REPORT JUNE 2011 #12;i Authors This report was a collaborative and in the fuel cell industry. The authors especially wish to thank Sunita Satyapal, Nancy Garland and the staff of the U.S. Department of Energy's Fuel Cell Technologies Program for their support and guidance

459

Fuel cell integrated with steam reformer  

DOE Patents [OSTI]

A H.sub.2 -air fuel cell integrated with a steam reformer is disclosed wherein a superheated water/methanol mixture is fed to a catalytic reformer to provide a continuous supply of hydrogen to the fuel cell, the gases exhausted from the anode of the fuel cell providing the thermal energy, via combustion, for superheating the water/methanol mixture.

Beshty, Bahjat S. (Lower Makefield, PA); Whelan, James A. (Bricktown, NJ)

1987-01-01T23:59:59.000Z

460

Development of Low-Cost Manufacturing Processes for Planar, Multilayer Solid Oxide Fuel Cell Elements  

SciTech Connect (OSTI)

This report summarizes the results of Phase II of this program, 'Low-Cost Manufacturing Of Multilayer Ceramic Fuel Cells'. The objective of the program is to develop advanced ceramic manufacturing technologies for making planar solid oxide fuel cell (SOFC) components that are more economical and reliable for a variety of applications. Phase II development work focused on three distinct manufacturing approaches (or tracks) for planar solid oxide fuel cell elements. Two development tracks, led by NexTech Materials and Oak Ridge National Laboratory, involved co-sintering of planar SOFC elements of cathode-supported and anode-supported variations. A third development track, led by the University of Missouri-Rolla, focused on a revolutionary approach for reducing operating temperature of SOFCs by using spin-coating to deposit ultra-thin, nano-crystalline YSZ electrolyte films. The work in Phase II was supported by characterization work at Ohio State University. The primary technical accomplishments within each of the three development tracks are summarized. Track 1--NexTech's targeted manufacturing process for planar SOFC elements involves tape casting of porous electrode substrates, colloidal-spray deposition of YSZ electrolyte films, co-sintering of bi-layer elements, and screen printing of opposite electrode coatings. The bulk of NexTech's work focused on making cathode-supported elements, although the processes developed at NexTech also were applied to the fabrication of anode-supported cells. Primary accomplishments within this track are summarized below: (1) Scale up of lanthanum strontium manganite (LSM) cathode powder production process; (2) Development and scale-up of tape casting methods for cathode and anode substrates; (3) Development of automated ultrasonic-spray process for depositing YSZ films; (4) Successful co-sintering of flat bi-layer elements (both cathode and anode supported); (5) Development of anode and cathode screen-printing processes; and (6) Demonstration of novel processes for composite cathode and cermet anode materials. Track 2--ORNL's development work focused solely on making anode-supported planar cells by tape casting of a porous anode substrate, screen printing of a YSZ electrolyte film, co-sintering of the bi-layer element, and screen-printing of an opposite cathode coating. Primary accomplishments within this track are summarized below: (1) Development and scale-up of anode tape casting and lamination processes; (2) Development of proprietary ink vehicle for screen-printing processes; (3) Development of screen-printing process for depositing YSZ films; (4) Successful co-sintering of flat bi-layer anode-supported elements; and (5) Development of cathode screen-printing process. Track 3--UMR's process development work involved fabrication of a micro-porous cathode substrate, deposition of a nano-porous interlayer film, deposition of nano-crystalline YSZ electrolyte films from polymeric precursor solutions, and deposition of an anode coating. Primary accomplishments within this track are summarized below: (1) Development and scale up of tape casting and sintering methods for cathode substrates; (2) Deposition of nano-porous ceria interlayer films on cathode substrates; (3) Successful deposition of dense YSZ films on porous cathode substrates; and (4) Identification of several anode material options.

Scott Swartz; Matthew Seabaugh; William Dawson; Tim Armstrong; Harlan Anderson; John Lannutti

2001-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "fuel cell cathode" 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.


461

Cooling assembly for fuel cells  

DOE Patents [OSTI]

A cooling assembly for fuel cells having a simplified construction whereby coolant is efficiently circulated through a conduit arranged in serpentine fashion in a channel within a member of such assembly. The channel is adapted to cradle a flexible, chemically inert, conformable conduit capable of manipulation into a variety of cooling patterns without crimping or otherwise restricting of coolant flow. The conduit, when assembled with the member, conforms into intimate contact with the member for good thermal conductivity. The conduit is non-corrodible and can be constructed as a single, manifold-free, continuous coolant passage means having only one inlet and one outlet.

Kaufman, Arthur (West Orange, NJ); Werth, John (Princeton, NJ)

1990-01-01T23:59:59.000Z

462

Carbonate fuel cell system with thermally integrated gasification  

DOE Patents [OSTI]

A fuel cell system employing a gasifier for generating fuel gas for the fuel cell of the fuel cell system and in which heat for the gasifier is derived from the anode exhaust gas of the fuel cell.

Steinfeld, George (Southbury, CT); Meyers, Steven J. (Huntington Beach, CA); Lee, Arthur (Fishkill, NY)

1996-01-01T23:59:59.000Z

463

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

464

Multivariable Robust Control of a Simulated Hybrid Solid Oxide Fuel Cell Gas Turbine Plant  

SciTech Connect (OSTI)

This paper presents a systematic approach to the multivariable robust control of a hybrid fuel cell gas turbine plant. The hybrid configuration under investigation comprises a physical simulation of a 300kW fuel cell coupled to a 120kW auxiliary power unit single spool gas turbine. The facility provides for the testing and simulation of different fuel cell models that in turn help identify the key issues encountered in the transient operation of such systems. An empirical model of the facility consisting of a simulated fuel cell cathode volume and balance of plant components is derived via frequency response data. Through the modulation of various airflow bypass valves within the hybrid configuration, Bode plots are used to derive key input/output interactions in Transfer Function format. A multivariate system is then built from individual transfer functions, creating a matrix that serves as the nominal plant in an H-Infinity robust control algorithm. The controller’s main objective is to track and maintain hybrid operational constraints in the fuel cell’s cathode airflow, and the turbo machinery states of temperature and speed, under transient disturbances. This algorithm is then tested on a Simulink/MatLab platform for various perturbations of load and fuel cell heat effluence.

Tsai, Alex; Banta, Larry; Tucker, D.A.; Gemmen, R.S.

2008-06-01T23:59:59.000Z

465

Advanced Fuel Reformer Development: Putting the 'Fuel' in Fuel Cells |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartment of EnergyAdministrative2 DOE Hydrogen andEnzymeAdvancedDepartment

466

Vision for Rollout of Fuel Cell Vehicles and Hydrogen Fuel Stations...  

Office of Environmental Management (EM)

Vision for Rollout of Fuel Cell Vehicles and Hydrogen Fuel Stations Vision for Rollout of Fuel Cell Vehicles and Hydrogen Fuel Stations This document establishes the California...

467

Fuels for Advanced CIDI Engines and Fuel Cells: 2000 Annual Progress...  

Broader source: Energy.gov (indexed) [DOE]

Fuels for Advanced CIDI Engines and Fuel Cells: 2000 Annual Progress Report Fuels for Advanced CIDI Engines and Fuel Cells: 2000 Annual Progress Report DOE's Office of...

468

Fuel quality issues in stationary fuel cell systems.  

SciTech Connect (OSTI)

Fuel cell systems are being deployed in stationary applications for the generation of electricity, heat, and hydrogen. These systems use a variety of fuel cell types, ranging from the low temperature polymer electrolyte fuel cell (PEFC) to the high temperature solid oxide fuel cell (SOFC). Depending on the application and location, these systems are being designed to operate on reformate or syngas produced from various fuels that include natural gas, biogas, coal gas, etc. All of these fuels contain species that can potentially damage the fuel cell anode or other unit operations and processes that precede the fuel cell stack. These detrimental effects include loss in performance or durability, and attenuating these effects requires additional components to reduce the impurity concentrations to tolerable levels, if not eliminate the impurity entirely. These impurity management components increase the complexity of the fuel cell system, and they add to the system's capital and operating costs (such as regeneration, replacement and disposal of spent material and maintenance). This project reviewed the public domain information available on the impurities encountered in stationary fuel cell systems, and the effects of the impurities on the fuel cells. A database has been set up that classifies the impurities, especially in renewable fuels, such as landfill gas and anaerobic digester gas. It documents the known deleterious effects on fuel cells, and the maximum allowable concentrations of select impurities suggested by manufacturers and researchers. The literature review helped to identify the impurity removal strategies that are available, and their effectiveness, capacity, and cost. A generic model of a stationary fuel-cell based power plant operating on digester and landfill gas has been developed; it includes a gas processing unit, followed by a fuel cell system. The model includes the key impurity removal steps to enable predictions of impurity breakthrough, component sizing, and utility needs. These data, along with process efficiency results from the model, were subsequently used to calculate the cost of electricity. Sensitivity analyses were conducted to correlate the concentrations of key impurities in the fuel gas feedstock to the cost of electricity.

Papadias, D.; Ahmed, S.; Kumar, R. (Chemical Sciences and Engineering Division)

2012-02-07T23:59:59.000Z

469

Method of forming a package for MEMS-based fuel cell  

DOE Patents [OSTI]

A MEMS-based fuel cell package and method thereof is disclosed. The fuel cell package comprises seven layers: (1) a sub-package fuel reservoir interface layer, (2) an anode manifold support layer, (3) a fuel/anode manifold and resistive heater layer, (4) a Thick Film Microporous Flow Host Structure layer containing a fuel cell, (5) an air manifold layer, (6) a cathode manifold support structure layer, and (7) a cap. Fuel cell packages with more than one fuel cell are formed by positioning stacks of these layers in series and/or parallel. The fuel cell package materials such as a molded plastic or a ceramic green tape material can be patterned, aligned and stacked to form three dimensional microfluidic channels that provide electrical feedthroughs from various layers which are bonded together and mechanically support a MEMS-based miniature fuel cell. The package incorporates resistive heating elements to control the temperature of the fuel cell stack. The package is fired to form a bond between the layers and one or more microporous flow host structures containing fuel cells are inserted within the Thick Film Microporous Flow Host Structure layer of the package.

Morse, Jeffrey D; Jankowski, Alan F

2013-05-21T23:59:59.000Z

470

Microbial Fuel Cells In this experiment, a batch mixed culture microbial fuel cell with Shewanella  

E-Print Network [OSTI]

Microbial Fuel Cells Abstract In this experiment, a batch mixed culture microbial fuel cell conditions under nitrogen gas. In the microbial fuel cell with Shewanella putrefaciens sp. 200 as catalysisM at pH=7. Introduction Microbial fuel cells (MFC) are systems that take advantage of certain

Fay, Noah

471

Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report Section IV. Fuel Cells  

E-Print Network [OSTI]

W advanced PEM power plant. Approach Figure 1 provides a schematic of the gasoline fuel cell power plantHydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report 265 Section IV. Fuel Cells #12;Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report 266 #12;Hydrogen

472

Fuel Transformer Solid Oxide Fuel Cell  

SciTech Connect (OSTI)

The following report documents the technical approach and conclusions made by Acumentrics Corporation during latest budget period toward the development of a low cost 10kW tubular SOFC power system. The present program, guided under direction from the National Energy Technology Laboratory of the US DOE, is a nine-year cost shared Cooperative Agreement totaling close to $74M funded both by the US DOE as well as Acumentrics Corporation and its partners. The latest budget period ran from January of 2006 through June 2006. Work focused on cell technology enhancements as well as BOP and power electronics improvements and overall system design. Significant progress was made in increasing cell power enhancements as well as decreasing material cost in a drive to meet the SECA cost targets. The following report documents these accomplishments in detail as well as the layout plans for further progress in next budget period.

Norman Bessette; Douglas S. Schmidt; Jolyon Rawson; Rhys Foster; Anthony Litka

2006-07-27T23:59:59.000Z

473

FUEL TRANSFORMER SOLID OXIDE FUEL CELL  

SciTech Connect (OSTI)

The following report documents the technical approach and conclusions made by Acumentrics Corporation during latest budget period toward the development of a low cost 10kW tubular SOFC power system. The present program, guided under direction from the National Energy Technology Laboratory of the US DOE, is a nine-year cost shared Cooperative Agreement totaling close to $74M funded both by the US DOE as well as Acumentrics Corporation and its partners. The latest budget period ran from July of 2004 through January 2004. Work was focused on cell technology enhancements as well as BOP and power electronics improvements and overall system design. Significant progress was made in increasing cell power enhancements as well as decreasing material cost in a drive to meet the SECA cost targets. The following report documents these accomplishments in detail as well as the lay out plans for further progress in next budget period.

Norman Bessette; Douglas S. Schmidt; Jolyon Rawson; Lars Allfather; Anthony Litka

2005-03-24T23:59:59.000Z

474

Fuel Transformer Solid Oxide Fuel Cell  

SciTech Connect (OSTI)

The following report documents the technical approach and conclusions made by Acumentrics Corporation during latest budget period toward the development of a low cost 10kW tubular SOFC power system. The present program, guided under direction from the National Energy Technology Laboratory of the US DOE, is a nine-year cost shared Cooperative Agreement totaling close to $74M funded both by the US DOE as well as Acumentrics Corporation and its partners. The latest budget period ran from January of 2005 through June 2005. Work focused on cell technology enhancements as well as BOP and power electronics improvements and overall system design. Significant progress was made in increasing cell power enhancements as well as decreasing material cost in a drive to meet the SECA cost targets. The following report documents these accomplishments in detail as well as the layout plans for further progress in next budget period.

Norman Bessette; Douglas S. Schmidt; Jolyon Rawson; Lars Allfather; Anthony Litka

2005-08-01T23:59:59.000Z

475

Fuel Transformer Solid Oxide Fuel Cell  

SciTech Connect (OSTI)

The following report documents the technical approach and conclusions made by Acumentrics Corporation during latest budget period toward the development of a low cost 10kW tubular SOFC power system. The present program, guided under direction from the National Energy Technology Laboratory of the US DOE, is a nine-year cost shared Cooperative Agreement totaling close to $74M funded both by the US DOE as well as Acumentrics Corporation and its partners. The latest budget period ran from July of 2005 through December 2005. Work focused on cell technology enhancements as well as BOP and power electronics improvements and overall system design. Significant progress was made in increasing cell power enhancements as well as decreasing material cost in a drive to meet the SECA cost targets. The following report documents these accomplishments in detail as well as the layout plans for further progress in next budget period.

Norman Bessette; Douglas S. Schmidt; Jolyon Rawson; Rhys Foster; Anthony Litka

2007-01-27T23:59:59.000Z

476

Miniature fuel-cell system complete with on-demand fuel and oxidant supply  

E-Print Network [OSTI]

scale direct methanol fuel cell development,” Energy, vol.flow-based microfluidic fuel cell," J. Am. Chem. Soc. , vol.electrolyte membrane fuel cell design," J. Power Sources,

Hur, JI; Kim, C-J

2015-01-01T23:59:59.000Z

477

SunLine Expands Horizons with Fuel Cell Bus Demo. Hydrogen, Fuel...  

Broader source: Energy.gov (indexed) [DOE]

Expands Horizons with Fuel Cell Bus Demo. Hydrogen, Fuel Cells & Infrastructure Technologies Program, Fuel Cell Bus Demonstration Projects (Fact Sheet). SunLine Expands Horizons...

478

Optimization of Fuel Cell System Operating Conditions for Fuel Cell Vehicles  

E-Print Network [OSTI]

a Direct-Hydrogen, Load-Following Fuel 13. S. Gelfi, A.G.versus a Direct-Hydrogen Load-Following Fuel Cell te d M 22.vehicle model of a load-following direct hydrogen fuel cell

Zhao, Hengbing; Burke, Andy

2008-01-01T23:59:59.000Z

479

STAGING OF FUEL CELLS - PHASE II  

SciTech Connect (OSTI)

TIAX has executed a laboratory-based development program aiming at the improvement of stationary fuel cell systems. The two-year long development program resulted in an improved understanding of staged fuel cells and inorganic proton conductors through evaluation of results from a number of laboratory tasks: (1) Development of a fuel cell modeling tool--Multi-scale model was developed, capable of analyzing the effects of materials and operating conditions; and this model allowed studying various ''what-if'' conditions for hypothetically staged fuel cells; (2) Study of new high temperature proton conductor--TIAX discovery of a new class of sulfonated inorganics capable of conducting protons when exposed to water; and study involved synthesis and conductivity measurements of novel compounds up to 140 C; (3) Electrochemical fuel cell measurements--the feasibility of staged fuel cells was tested in TIAX's fuel cell laboratories experimental design was based on results from modeling.

Per Onnerud; Suresh Sriramulu

2002-08-29T23:59:59.000Z

480

ENVIRONMENTAL BIOTECHNOLOGY Brewery wastewater treatment using air-cathode  

E-Print Network [OSTI]

. 1994; Parawira et al. 2005). Biological treatment processes are particularly effective for wastewaterENVIRONMENTAL BIOTECHNOLOGY Brewery wastewater treatment using air-cathode microbial fuel cells wastewater treatment using microbial fuel cells (MFCs) will require a better understanding of how operational

Note: This page contains sample records for the topic "fuel cell cathode" 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.


481

DEVELOPMENT OF NOVEL ELECTROCATALYSTS FOR PROTON EXCHANGE MEMBRANE FUEL CELLS  

SciTech Connect (OSTI)

Proton Exchange Membrane Fuel Cell (PEMFC) is one of the most promising power sources for space and electric vehicle applications. Platinum (Pt) catalyst is used for both fuel and air electrodes in PEMFCs. The carbon monoxide (CO) contamination of H{sub 2} greatly affects electrocatalysts used at the anode of PEMFCs and decrease the cell performance. This irreversible poisoning of the anode can happen even in CO concentrations as low as few ppm, and therefore, require expensive scrubbing of the H{sub 2}-fuel to reduce the contaminant concentration to acceptable level. In order to commercialize this environmentally sound source of energy/power system, development of suitable CO-tolerant catalyst is needed. In this work, we have synthesized several novel electrocatalysts (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. The concentration of CO in the H{sub 2} fuel varied from 10 ppm to 100 ppm. The performance of the electrodes was evaluated by determining the cell potential against current density. The effect of temperature, catalyst compositions, and electrode film preparation methods on the performance of PEM fuel cell has also been studied. It was found that at 70 C and 3.5 atm pressure at the cathode, Pt-alloy catalysts (10 wt % Pt/Ru/C, 20 wt % Pt/Mo/C) were more CO-tolerant than 20 wt % Pt catalyst alone. It was also observed that spraying method is better for the preparation of electrode film than the brushing technique. Some of these results are summarized in this report.

Shamsuddin Ilias

2001-07-06T23:59:59.000Z

482

Planning a Commercial Fuel Cell Installation  

E-Print Network [OSTI]

the alkaline and molten carbonate cells as they may have special ap~lications since their operating characteristics are noticeably different from the phosphoric acid cells. Next, the Los Alamos study concludes that the phosphoric acid fuel cell matches...

Bowden, J. R.; May, G. W.

483

Optimum Performance of Direct Hydrogen Hybrid Fuel Cell Vehicles  

E-Print Network [OSTI]

in batteries, ultracapacitors, fuel cells and hybrid vehicleBattery, Hybrid and Fuel Cell Electric Vehicle SymposiumBattery, Hybrid and Fuel Cell Electric Vehicle Symposium

Zhao, Hengbing; Burke, Andy

2009-01-01T23:59:59.000Z

484

Modeling Cold Start in a Polymer-Electrolyte Fuel Cell  

E-Print Network [OSTI]

conditions used for fuel—cell simulations. 3.12 Values usedin Polymer Electrolyte Fuel Cells — II. Parametric Study,”of Polymer Electrolyte Fuel Cells,” Electrochimica Acta, 53,

Balliet, Ryan

2010-01-01T23:59:59.000Z

485

Societal lifetime cost of hydrogen fuel cell vehicles  

E-Print Network [OSTI]

Comparative Assessment of Fuel Cell Cars, Massachusettselectric and hydrogen fuel cell vehicles, Journal of PowerTransition to Hydrogen Fuel Cell Vehicles & the Potential

Sun, Yongling; Ogden, J; Delucchi, Mark

2010-01-01T23:59:59.000Z

486

Microchannel High-Temperature Recuperator for Fuel Cell Systems...  

Broader source: Energy.gov (indexed) [DOE]

Microchannel High-Temperature Recuperator for Fuel Cell Systems - Fact Sheet, 2011 Microchannel High-Temperature Recuperator for Fuel Cell Systems - Fact Sheet, 2011 FuelCell...

487

Fuel Cell Power Model for CHHP System Economics and Performance...  

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

Fuel Cell Tri-Generation System Case Study using the H2A Stationary Model Stationary Fuel Cells: Overview of Hydrogen and Fuel Cell Activities Biogas Opportunities Roadmap...

488

Water Emissions from Fuel Cell Vehicles | Department of Energy  

Energy Savers [EERE]

Water Emissions from Fuel Cell Vehicles Water Emissions from Fuel Cell Vehicles Hydrogen fuel cell vehicles (FCVs) emit approximately the same amount of water per mile as vehicles...

489

Hydrogen and Fuel Cells Success Stories | Department of Energy  

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

Hydrogen and Fuel Cells Success Stories Hydrogen and Fuel Cells Success Stories RSS The Office of Energy Efficiency and Renewable Energy's (EERE) successes in advanced fuel cell...

490

Fuel Cell Development and Test Laboratory (Fact Sheet), NREL...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuel Cell Development and Test Laboratory may include: * Fuel cell and fuel cell component manufacturers * Certification laboratories * Government agencies * Universities * Other...

491

Fuel Cell Transit Bus Coordination and Evaluation Plan California...  

Broader source: Energy.gov (indexed) [DOE]

Transit Bus Coordination and Evaluation Plan California Fuel Cell Transit Evaluation Team Fuel Cell Transit Bus Coordination and Evaluation Plan California Fuel Cell Transit...

492

Joint Fuel Cell Technologies and Advanced Manufacturing Webinar...  

Broader source: Energy.gov (indexed) [DOE]

Joint Fuel Cell Technologies and Advanced Manufacturing Webinar Joint Fuel Cell Technologies and Advanced Manufacturing Webinar Presentation slides from the joint Fuel Cell...

493

Modeling Cold Start in a Polymer-Electrolyte Fuel Cell  

E-Print Network [OSTI]

conditions used for fuel—cell simulations. 3.12 Values usedin Polymer Electrolyte Fuel Cells — II. Parametric Study,”Fuel Cells . . . . . . . . . . . . . . . . . . . . . . 1.1.1

Balliet, Ryan

2010-01-01T23:59:59.000Z

494

Biogas and Fuel Cells Workshop Summary Report: Proceedings from...  

Broader source: Energy.gov (indexed) [DOE]

and Fuel Cells Workshop Summary Report: Proceedings from the Biogas and Fuel Cells Workshop, Golden, Colorado, June 11-13, 2012 Biogas and Fuel Cells Workshop Summary Report:...

495

Societal lifetime cost of hydrogen fuel cell vehicles  

E-Print Network [OSTI]

of Energy for hydrogen and fuel cell vehicle markethybrid, electric and hydrogen fuel cell vehicles, Journal ofof the Transition to Hydrogen Fuel Cell Vehicles & the

Sun, Yongling; Ogden, J; Delucchi, Mark

2010-01-01T23:59:59.000Z

496

Overview of DOE Hydrogen and Fuel Cell Activities: 2010 Gordon...  

Broader source: Energy.gov (indexed) [DOE]

Overview of DOE Hydrogen and Fuel Cell Activities: 2010 Gordon Research Conference on Fuel Cells Overview of DOE Hydrogen and Fuel Cell Activities: 2010 Gordon Research Conference...

497

DOE Hydrogen and Fuel Cells Program Record, Record # 13008: Industry...  

Broader source: Energy.gov (indexed) [DOE]

Record 13008: Industry Deployed Fuel Cell Powered Lift Trucks DOE Hydrogen and Fuel Cells Program Record, Record 13008: Industry Deployed Fuel Cell Powered Lift Trucks...

498

Hydrogen and Fuel Cell Activities: 5th International Conference...  

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

Hydrogen and Fuel Cell Activities: 5th International Conference on Polymer Batteries and Fuel Cells Hydrogen and Fuel Cell Activities: 5th International Conference on Polymer...

499