Low cost stable air electrode material for high temperature solid oxide electrolyte electrochemical cells
February 29, 2016. 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 References 534270 Electrolyte-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 InventorsAssigneeApplicationNo. 608889 filed on 02/29/1996US Classes:429/30, Solid electrolyte264/618, Ceramic containing electrode, or coil, electrode, or coil having ceramic portion, or shaped electrolyte body429/31, Tubular429/40Catalytic electrode structure or compositionExaminersPrimary: Willis, Prince Jr.Assistant: Krueger, Jonathan S. Foreign Patent References
International ClassH01M 008/10AbstractA low cost, lanthanide-substituted, dimensionally and thermally stable, gas permeable, electrically conductive, porous ceramic air electrode composition of lanthanide-substituted doped lanthanum manganite is provided which is used as the cathode in high temperature, solid oxide electrolyte fuel cells and generators. The air electrode composition of this invention has a much lower fabrication cost as a result of using a lower cost lanthanide mixture, either a natural mixture or an unfinished lanthanide concentrate obtained from a natural mixture subjected to incomplete purification, as the raw material in place of part or all of the higher cost individual lanthanum. The mixed lanthanide primarily contains a mixture of at least La, Ce, Pr, and Nd, or at least La, Ce, Pr, Nd and Sm in its lanthanide content, but can also include minor amounts of other lanthanides and trace impurities. The use of lanthanides in place of some or all of the lanthanum also increases the dimensional stability of the air electrode. This low cost air electrode can be fabricated as a cathode for use in high temperature, solid oxide fuel cells and generators. |
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