发明名称 |
FUEL CELL GAS DIFFUSION LAYER |
摘要 |
The present invention provides a fuel cell gas diffusion layer comprising a hydrophilic surface layer having a thickness of no more than 1 micron, and, thereunder, a hydrophobic second layer comprising a fluoropolymer having a thickness of at least 5 microns. Additionally, the present invention provides a method of making a fuel cell gas diffusion layer comprising the steps of a) providing a carbon fiber construction; b) coating at least the upper surface of the carbon fiber construction with composition which comprises a fluoropolymer; and c) exposing the upper surface to at least one plasma, such as a silane plasma, so as to generate a hydrophilic surface layer having a thickness of no more than 1 micron. The present invention also provides a method additionally comprising the step of partially covering the upper surface with a mask having windows according to a pattern, such that the hydrophilic surface layer is applied according to the pattern. The present invention also provides a method wherein the carbon fiber construction is provided as a roll good and the step of exposing said upper surface to at least one plasma is performed in continuous roll-to-roll fashion. |
申请公布号 |
WO2005034271(A2) |
申请公布日期 |
2005.04.14 |
申请号 |
WO2004US28750 |
申请日期 |
2004.09.03 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
MEKALA, DAVID R.,;STEGINK, DAVID W.,;DAVID, MOSES M.,;FRISK, JOSEPH W., |
分类号 |
H01M8/02;H01M8/10 |
主分类号 |
H01M8/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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