Air electrode composition for solid oxide fuel cell
December 19, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectrolyte-electrode assembly for a combustible battery Electrode with lanthanum-containing perovskite surface Compound cell for high-temperature electrochemical reactions Interconnector material for series-connected electrolytic cells operated at high temperatures Air electrode material for high temperature electrochemical cells Electrically conductive ceramic material High bulk self-supporting electrode with integral gas feed conduit for solid oxide fuel cells Cermet electrode Elongated solid electrolyte cell configurations and flexible connections therefor Low circumferential voltage gradient self supporting electrode for solid oxide fuel cells InventorsAssigneeApplicationNo. 995078 filed on 12/19/1997US Classes:252/521.1, Rare earth metal compound204/291, Composition252/509, Magnesium, alkaline earth metal, or rare earth metal compound429/30, Solid electrolyte429/31, Tubular429/33, Electrolyte composition chemically specified429/40Catalytic electrode structure or compositionExaminersPrimary: Bell, Bruce F.Foreign Patent References
International ClassH01B 001/06AbstractAn 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 ABO3. 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.Other References
Field of SearchCatalytic electrode structure or compositionSolid electrolyte Electrolyte composition chemically specified Tubular Composition Magnesium, alkaline earth metal, or rare earth metal compound Rare earth metal compound Yttrium, lanthanide, actinide, or transactinide containing (i.e., atomic numbers 39 or 57-71 or 89+) |
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