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Title:
FLUID DIFFUSION LAYERS FOR FUEL CELLS
Document Type and Number:
WIPO Patent Application WO2002023649
Kind Code:
A3
Abstract:
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.

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Inventors:
BEATTIE PAUL D (CA)
WILKINSON DAVID P (CA)
KOZAK PAUL (CA)
WANG HAIJIANG (CA)
NEUMANN SHEILAH (CA)
GORDON JOHN ROBERT (CA)
FONG KELVIN KEEN-VEN (CA)
WONG-CHEUNG SONIA GEILLIS (CA)
DAVIS MICHAEL TODD (CA)
CHIEM BIEN (CA)
ERICKSON LYNN C (CA)
Application Number:
PCT/CA2001/001307
Publication Date:
September 19, 2002
Filing Date:
September 14, 2001
Export Citation:
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Assignee:
BALLARD POWER SYSTEMS (CA)
BEATTIE PAUL D (CA)
WILKINSON DAVID P (CA)
KOZAK PAUL (CA)
WANG HAIJIANG (CA)
NEUMANN SHEILAH (CA)
GORDON JOHN ROBERT (CA)
FONG KELVIN KEEN-VEN (CA)
WONG-CHEUNG SONIA GEILLIS (CA)
DAVIS MICHAEL TODD (CA)
CHIEM BIEN (CA)
ERICKSON LYNN C (CA)
International Classes:
C01B31/02; H01M4/86; H01M4/88; H01M4/94; H01M4/96; H01M8/02; H01M8/04; H01M8/10; (IPC1-7): H01M4/96; H01M8/02
Foreign References:
EP0286945A21988-10-19
US5879417A1999-03-09
EP0697747A11996-02-21
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