Title:
微孔質層を有する拡散媒体
Document Type and Number:
Japanese Patent JP2008511119
Kind Code:
A
Abstract:
Specially prepared gas diffusion media improve the performance of PEM fuel cells. The media are made by first dipping an electrically conductive porous material such as carbon fiber paper into a suspension of hydrophobic polymer and drying the paper to create a desired deposition pattern of hydrophobic polymer on the substrate. Then a paste containing a fluorocarbon polymer and carbon particles is applied to a desired side of the substrate, and thereafter the paste and hydrophobic polymer are sintered together at high temperature on the paper. In particular, nonionic surfactants remain on the carbon fiber paper after the initial hydrophobic polymer is applied to the electrically conductive porous material. When the paste is coated on the dried paper, the paste is in contact with a hydrophilic surface.
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Inventors:
Gee, Chun Shin
OHARA, Janet Y
Mathis, Mark F
OHARA, Janet Y
Mathis, Mark F
Application Number:
JP2007529832A
Publication Date:
April 10, 2008
Filing Date:
June 09, 2005
Export Citation:
Assignee:
GENERAL MOTORS CORPORATION
International Classes:
H01M4/88; H01M4/86; H01M8/02; H01M8/10
Domestic Patent References:
| JP2002352807A | 2002-12-06 | |||
| JPH0660885A | 1994-03-04 |
Foreign References:
| WO2005040331A1 | 2005-05-06 |
Attorney, Agent or Firm:
Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toyoji Matsuda
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toyoji Matsuda