Air electrode composition for solid oxide fuel cell

Kuo, Lewis; Ruka, Roswell J; Singhal, Subhash C

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Title: Air electrode composition for solid oxide fuel cell

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Abstract

An air electrode composition for a solid oxide fuel cell is disclosed. The air electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO.sub.3. The A-site of the air electrode composition comprises a mixed lanthanide in combination with rare earth and alkaline earth dopants. The B-site of the composition comprises Mn in combination with dopants such as Mg, Al, Cr and Ni. The mixed lanthanide comprises La, Ce, Pr and, optionally, Nd. The rare earth A-site dopants preferably comprise La, Nd or a combination thereof, while the alkaline earth A-site dopant preferably comprises Ca. The use of a mixed lanthanide substantially reduces raw material costs in comparison with compositions made from high purity lanthanum starting materials. The amount of the A-site and B-site dopants is controlled in order to provide an air electrode composition having a coefficient of thermal expansion which closely matches that of the other components of the solid oxide fuel cell.

Inventors:

Kuo, Lewis ^[1]; Ruka, Roswell J ^[2]; Singhal, Subhash C ^[3]

Monroeville, PA
Pittsburgh, PA
Murrysville, PA

Issue Date:: 1999-01-01

Research Org.:: Westinghouse Electric Corp., Pittsburgh, PA (United States)

OSTI Identifier:: 872422

Patent Number(s):: 5932146

Assignee:: Siemens Westinghouse Power Corporation (Orlando, FL)

Patent Classifications (CPCs):: C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B35/016 - {based on manganites}

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
H01M2004/8689 - {Positive electrodes}
H01M2008/1293 - {Fuel cells with solid oxide electrolytes}
H01M2300/0074 - Ion conductive at high temperature
H01M4/8621 - {containing only metallic or ceramic material, e.g. made by sintering or sputtering}
H01M4/8885 - {Sintering or firing}
H01M4/9016 - {Oxides, hydroxides or oxygenated metallic salts}
H01M4/9033 - {Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E60/50 - Fuel cells

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DOE Contract Number:: FC21-91MC28055

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: air; electrode; composition; solid; oxide; fuel; cell; disclosed; material; based; lanthanum; manganite; perovskite-like; crystal; structure; a-site; comprises; mixed; lanthanide; combination; rare; earth; alkaline; dopants; b-site; mn; mg; optionally; preferably; comprise; dopant; substantially; reduces; raw; costs; comparison; compositions; purity; starting; materials; amount; controlled; provide; coefficient; thermal; expansion; closely; matches; components; closely matches; fuel cell; substantially reduces; starting material; composition comprises; air electrode; thermal expansion; alkaline earth; oxide fuel; solid oxide; rare earth; electrode material; preferably comprises; starting materials; crystal structure; electrode composition; raw material; substantially reduce; lanthanum manganite; perovskite-like crystal; closely match; preferably comprise; /252/204/429/

Citation Formats


                    Kuo, Lewis, Ruka, Roswell J, and Singhal, Subhash C. Air electrode composition for solid oxide fuel cell.  United States: N. p., 1999. 
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                    Kuo, Lewis, Ruka, Roswell J, & Singhal, Subhash C. Air electrode composition for solid oxide fuel cell.  United States.

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                    Kuo, Lewis, Ruka, Roswell J, and Singhal, Subhash C. Fri .  
        "Air electrode composition for solid oxide fuel cell".  United States.  https://www.osti.gov/servlets/purl/872422.

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@article{osti_872422,

  title        = {Air electrode composition for solid oxide fuel cell},

  author       = {Kuo, Lewis and Ruka, Roswell J and Singhal, Subhash C},

  abstractNote = {An air electrode composition for a solid oxide fuel cell is disclosed. The air electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO.sub.3. The A-site of the air electrode composition comprises a mixed lanthanide in combination with rare earth and alkaline earth dopants. The B-site of the composition comprises Mn in combination with dopants such as Mg, Al, Cr and Ni. The mixed lanthanide comprises La, Ce, Pr and, optionally, Nd. The rare earth A-site dopants preferably comprise La, Nd or a combination thereof, while the alkaline earth A-site dopant preferably comprises Ca. The use of a mixed lanthanide substantially reduces raw material costs in comparison with compositions made from high purity lanthanum starting materials. The amount of the A-site and B-site dopants is controlled in order to provide an air electrode composition having a coefficient of thermal expansion which closely matches that of the other components of the solid oxide fuel cell.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1999},

  month        = {1}

}

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