FLUID DIFFUSION LAYERS FOR FUEL CELLS

FLUID DIFFUSION LAYERS FOR FUEL CELLS

Fluid diffusion layers with favorable mechanical and electrical properties are prepared for fuel cell electrodes by impregnating a porous carbonaceous web with a carbonizable polymer having pyrrolidone functionality and then carbonizing the pyrrolidone polymer. The polymer having pyrrolidone functio...

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Hauptverfasser: NEUMANN, SHEILAH, KOZAK, PAUL, GORDON, JOHN, ROBERT, DAVIS, MICHAEL, TODD, WANG, HAIJIANG, CHIEM, BIEN, BEATTIE, PAUL, D, WILKINSON, DAVID, P, FONG, KELVIN, KEEN-VEN, ERICKSON, LYNN, C, WONGUNG, SONIA, GEILLIS
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:Fluid diffusion layers with favorable mechanical and electrical properties are prepared for fuel cell electrodes by impregnating a porous carbonaceous web with a carbonizable polymer having pyrrolidone functionality and then carbonizing the pyrrolidone polymer. The polymer having pyrrolidone functionality is stabilized against vaporization by use of an oxidization step prior to carbonization. The fluid diffusion layers are particularly suitable for use as gas diffusion layers in solid polymer electrolyte fuel cells.