Separator for polymeric electrolyte fuel cell having a roughened surface
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United States of America Patent
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Feb 19, 2002
Grant Date -
N/A
app pub date -
Apr 8, 1999
filing date -
Apr 10, 1998
priority date (Note) -
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Abstract
The present invention provides a separator for a 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 .mu.m when measured by a surface roughness tester having a probe of 5 .mu.m in front end diameter; and a process for producing the above separator for a polymer electrolyte fuel cell, which process comprises immersing a molding of a separator for a polymer electrolyte fuel cell, in an acidic solution. The above separator for a 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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