Patent ID: 6660420
Filing Date: 2003-12-09
Classification: B29C,B29K,H01M,Y02E,Y02P

Abstract:
A separator for a fuel cell consisting of a complex which is configured by bonding graphite powder and a thermosetting resin to form the separator, with ribs having a predetermined shape being formed on a surface of the separator, whereina composition ratio of said graphite power in said complex is set to 60 to 90 wt. %, and a composition ratio of said thermosetting resin in said complex is set to 10 to 40 wt. % of said complex; an average particle diameter of said graphite powder is set to a range of 15 to 125 &mgr;m, and each rib is provided with an end portion contacting an electrode, and a surface roughness of at least the end portion is set to a range of Ra=0.1 to 0.5 &mgr;m as measured by a surface roughness meter having a probe of a diameter of 5 &mgr;m.