Patent ID: 6939638
Filing Date: 2005-09-06
Classification: H01M,Y02E,Y02P

Abstract:
1. A fuel cell separator having gas supply grooves on one side or both sides thereof which is molded from a composition composed mainly of an electrically conductive carbon powder being spherical or massive graphite having a mean particle diameter of 150 to 500 μm and a binding agent, wherein the electrically conductive carbon powder is present such that its particles longer than 70 μm in the major axis direction and longer than 50 μm in the minor axis direction along the vertical cross section of the fuel cell separator occupy more than 50% of the sectional area in the vertical direction, wherein said binding agent is present in an amount of from 10 to 50 parts by mass per 100 parts by mass of the electrically conductive carbon powder.