Separator for a fuel cell and manufacturing method of the...

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation

Reexamination Certificate

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C264S331110, C252S511000

Reexamination Certificate

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06864008

ABSTRACT:
To provide a separator for a fuel cell made of graphite excellent in mechanical strength and gas impermeability as well as electric characteristic properties, a separator for a fuel cell is produced from a molded body produced by filling a graphite powder21whose surface is coated with resin20in a molding die and by pressure-molding the powder. Such a molded body is provided with excellent mechanical strength of 40 MPa of bending strength or higher, 10×10−8cc·cm/cm2·sec·atm of gas permeability or lower, and electric property of 10×10−3Ω·cm of the volume resistance or lower even if the content of resin is decreased to as low as 10 to 24 wt. %.

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patent: 6544680 (2003-04-01), Takano et al.
patent: 20020004156 (2002-01-01), Mizuno
patent: 20020064701 (2002-05-01), Hand et al.

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