FUEL CELL SEPARATOR
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United States of America Patent
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Issued Date -
Jul 4, 2013
app pub date -
Aug 22, 2011
filing date -
Sep 10, 2010
priority date (Note) -
Abandoned
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Abstract
This fuel cell separator is obtained by irradiating the surface of a molded article formed by molding a composition containing graphite powder, an epoxy resin, a phenol resin, a curing accelerator, and an internal mold lubricant and is provided with the following characteristics. Accordingly, the conductivity and hydrophilicity of a fuel cell separator provided with grooves that form flow paths for gas supply and exhausting on the surface thereof can be improved, and also elutability can be reduced. Residue from laser irradiation of the surface is 5% or less by area ratio Arithmetic average roughness of surface is 0.80-1.50 μm Surface static contact angle is 15-60° Surface contact resistance is 3-7 mΩ·cm2 Ion exchanged water: under a condition of separator=9:1 (mass ratio), the conductivity after the separator has been immersed in ion exchanged water at 90° C. for 168 hours is 1.2 μS/cm or less.
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