Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1997-12-19
1999-08-03
Bell, Bruce F.
Compositions
Electrically conductive or emissive compositions
Metal compound containing
429 30, 429 31, 429 33, 429 40, 252509, 204291, H01B 106
Patent
active
059321466
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.
REFERENCES:
patent: 4052532 (1977-10-01), Tannenberger et al.
patent: 4133778 (1979-01-01), Gray
patent: 4174260 (1979-11-01), Schmidberger
patent: 4197362 (1980-04-01), Schmidberger et al.
patent: 4562124 (1985-12-01), Ruka
patent: 4645622 (1987-02-01), Kock
patent: 4751152 (1988-06-01), Zymboly
patent: 4767518 (1988-08-01), Maskalick
patent: 4874678 (1989-10-01), Reichner
patent: 4888254 (1989-12-01), Reichner
patent: 5106706 (1992-04-01), Singh et al.
patent: 5108850 (1992-04-01), Carlson et al.
patent: 5277995 (1994-01-01), Ruka et al.
patent: 5342704 (1994-08-01), Vasilow et al.
patent: 5686198 (1997-11-01), Kuo et al.
Mori et al., "Ln.sub.1-x AE.sub.x MnO.sub.3 (Ln=Lanthanum Concentrate Lanthanoids, AE=Sr,Ca) as a Cathode Material in Solid Oxide Fuel Cells", The 2nd International Fuel Cell Conference, Feb. 5-8, 1996.
Kuo Lewis
Ruka Roswell J.
Singhal Subhash C.
Bell Bruce F.
Siemens Westinghouse Power Corporation
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