Separator for polymer electrolyte fuel cell and process for...

H - Electricity – 01 – M

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H01M 2/14 (2006.01) H01M 2/16 (2006.01) H01M 2/18 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2268423

The present invention provides: a separator for polymer electrolyte fuel cell, having, at the surface contacting with the electrode of the fuel cell, a surface roughness of Ra = 0.1 to 10 µm when measured by a surface roughness tester having a probe of 5 µm in front end diameter; and a process for producing the above separator for polymer electrolyte fuel cell, which process comprises immersing a molding of separator for polymer electrolyte fuel cell, in an acidic solution. The above separator for polymer electrolyte fuel cell alleviates the problems of the prior art and has low contact resistance at the interface with the electrode of the fuel cell.

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