| 摘要 |
Provided is a separator for fuel cells, which is not susceptible to occlusion of a flow channel due to water that is generated during the power generation for a long period of time, and which is suppressed in increase of the contact resistance and decrease of the power generation efficiency, while having excellent strength and excellent uniformity. A separator for fuel cells, which is obtained by forming a hydrophilic thermoset resin film on a main surface of a base that is formed of a graphite resin composite molded body having a surface that is provided with a rib portion and a groove portion. This separator for fuel cells is characterized in that: the graphite resin composite molded body contains a graphite powder and a resin component at a mass ratio, that is (the mass of the graphite powder)/(the mass of the resin component), of from 90/10 to 70/30; at least a part of the rib portion and a part of the groove portion formed in the surface of the base that is formed of the graphite resin composite molded body are subjected to a surface roughening treatment so as to have a surface roughness of 0.15-1.5 μm; and the hydrophilic thermoset resin film is formed only in the groove portion of the surface of the graphite resin composite molded body. |
