ELECTROLYTE FILM ELECTRODE UNION, FUEL CELL CONTAINING THE SAME AND PROCESS FOR PRODUCING THEM

Title:

ELECTROLYTE FILM ELECTRODE UNION, FUEL CELL CONTAINING THE SAME AND PROCESS FOR PRODUCING THEM

Document Type and Number:

WIPO Patent Application WO/2003/081700

Kind Code:

A1

Abstract:

A gas diffusion layer for fuel cell, comprising a woven fabric of carbon fiber warp and weft threads, wherein the spacing (X) between neighboring texture points at which warp and weft threads cross each other and the thickness of woven fabric (Y) satisfy the formula 1.4 ≤ X/Y ≤ 3.5. This reduces the unevenness of substrate surface and inhibits microshort-circuiting attributed to sticking of woven fabric carbon fibers into a polymer electrolyte film of fuel cell, thereby enhancing the performance of the fuel cell. For further inhibition of the sticking of carbon fibers of gas diffusion layer substrate into the polymer electrolyte film, (1) a fastening pressure per area of contact between individual electrode and individual conductive separator plate ranging from 1 to 20 kgf/cm² is applied to the fuel cell, or (2) before disposing of the gas diffusion layer on the polymer electrolyte film, the surface of the gas diffusion layer is heated so as to smooth irregular surface of carbon fibers.

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Inventors:

YOSHIDA AKIHIKO (JP)
HORI YOSHIHIRO (JP)
UCHIDA MAKOTO (JP)
YASUMOTO EIICHI (JP)
TAKEBE YASUO (JP)
SAKAI OSAMU (JP)
KOSAKO SHINYA (JP)
YONAMINE TAKESHI (JP)
YAMAUCHI MASAKI (JP)
SUGAWARA YASUSHI (JP)
MORITA JUNJI (JP)

Application Number:

PCT/JP2003/003662

Publication Date:

October 02, 2003

Filing Date:

March 25, 2003

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
YOSHIDA AKIHIKO (JP)
HORI YOSHIHIRO (JP)
UCHIDA MAKOTO (JP)
YASUMOTO EIICHI (JP)
TAKEBE YASUO (JP)
SAKAI OSAMU (JP)
KOSAKO SHINYA (JP)
YONAMINE TAKESHI (JP)
YAMAUCHI MASAKI (JP)
SUGAWARA YASUSHI (JP)
MORITA JUNJI (JP)

International Classes:

D03D15/00; D03D15/12; H01M4/86; H01M4/88; H01M4/92; H01M4/96; (IPC1-7): H01M4/86; H01M4/88; H01M4/96; H01M8/02; H01M8/10; D01F9/12; D03D15/12

Domestic Patent References:

WO2002042534A1	2002-05-30
WO2002008150A2	2002-01-31

Foreign References:

JP2002327355A	2002-11-15
JP2001345108A	2001-12-14
JPH08124583A	1996-05-17
JP2002348743A	2002-12-04
JP2003045443A	2003-02-14
JP2003109616A	2003-04-11

Other References: