Molten carbonate fuel cell separator

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation

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429 36, 429 37, 429247, H01M 208

Patent

active

046095950

ABSTRACT:
In a stacked array of molten carbonate fuel cells, a fuel cell separator is positioned between adjacent fuel cells to provide isolation as well as a conductive path therebetween. The center portion of the fuel cell separator includes a generally rectangular, flat, electrical conductor. Around the periphery of the flat portion of the separator are positioned a plurality of elongated resilient flanges which form a gas-tight seal around the edges of the fuel cell. With one elongated flange resiliently engaging a respective edge of the center portion of the separator, the sealing flanges, which are preferably comprised of a noncorrosive material such as an alloy of yttrium, iron, aluminum or chromium, form a tight-fitting wet seal for confining the corrosive elements of the fuel cell therein. This arrangement permits a good conductive material which may be highly subject to corrosion and dissolution to be used in combination with a corrosion-resistant material in the fuel cell separator of a molten carbonate fuel cell for improved fuel cell conductivity and a gas-tight wet seal.

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Vidt et al., "Evaluation of Gassification and Gas Cleanup Processes for Use in Molten Carbonate Fuel Cell Power Plants" Final Report, U.S. D.O.E. Contract DE-AC21-81MC16220, pp. 108-115.
"Development of Molten Carbonate Fuel Cell Power Plant Technology" Quarterly Report, U.S. D.O.E Contract DE-AC01-79ET15440, pp. 2-20.

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