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Title:
GAS DIFFUSION ELECTRODE AND SOLID-STATE HIGH-MOLECULAR ELECTROLYTE TYPE FUEL CELL
Document Type and Number:
WIPO Patent Application WO/2005/124903
Kind Code:
A1
Abstract:
A gas diffusion electrode includes: an electrode catalyst layer (13); porous layers (11, 12) arranged on the electrode catalyst layer (13) and including at least two layers: a second porous layer (12) and a first porous layer (11) formed from materials having different water repellencies, wherein the second porous layer (12) arranged at the side of the electrode catalyst layer (13) has a higher water repellency than the first porous layer (11); and oxidizer gas diffusion substrate (10) arranged on the porous layers (11, 12) and formed by carbon fiber. According to the gas diffusion electrode, it is possible to improve the water repellency of the generated water from the electrode catalyst layer to the gas diffusion layer, the moisture retention and the gas diffusion characteristic of the electrode catalyst layer. Moreover, a solid-state high-molecular electrolyte type fuel cell enables stable electricity generation characteristic even under an operation condition of a wide humidity range and a wide current density region.

Inventors:
ICHIKAWA SATORU
YAMAMOTO MASAHIRO
WAKI NORIHISA
Application Number:
PCT/JP2005/011339
Publication Date:
December 29, 2005
Filing Date:
June 21, 2005
Export Citation:
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Assignee:
NISSAN MOTOR (JP)
ICHIKAWA SATORU
YAMAMOTO MASAHIRO
WAKI NORIHISA
International Classes:
H01M4/86; H01M4/88; H01M4/96; H01M8/02; H01M8/10; (IPC1-7): H01M4/86; H01M4/88; H01M4/96; H01M8/02; H01M8/10
Foreign References:
JP2003059498A2003-02-28
JP2003109604A2003-04-11
JP2001216973A2001-08-10
JP2003217599A2003-07-31
JP2001338655A2001-12-07
JPH09245800A1997-09-19
US5620807A1997-04-15
JP2001093533A2001-04-06
JPH09245800A1997-09-19
JP2003109604A2003-04-11
JPH0650039B21994-06-29
JP2003059498A2003-02-28
Other References:
See also references of EP 1775788A4
Attorney, Agent or Firm:
Miyoshi, Hidekazu (2-8 Toranomon 1-chome, Minato-k, Tokyo 01, JP)
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