Method of fabrication of high power density solid oxide fuel...

Coating processes – Electrical product produced – Fuel cell part

Reexamination Certificate

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C427S402000, C427S421100

Reexamination Certificate

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10894900

ABSTRACT:
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/cm2at 600° C. and 900 mW/cm2at 700° C. which constitutes a 2-3 times increased in power density over conventionally produced SOFCs.

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patent: 6358567 (2002-03-01), Pham et al.
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Pham et al., “Colloidal Spray Deposition Technique for the Processing of Thin Film Solid Oxide Fuel Cells”, Lawrence Livermore National Laboratory, URCL-JC-135760, Aug. 31, 1999, pp. 1-7.
Souza et al. “Thin-film solid fuel cell with high performance at low-temperature”, Solid State Ionics 98 (1997) pp. 57-61.

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