Conductive composition for solid polymer type fuel cell separator, solid polymer type fuel cell separator, solid polymer type fuel cell and solid polymer type fuel cell system using the separator

摘要

1. A conductive composition for a polymer electrolyte fuel cell separator comprising: 1) a conductive component composed of graphite particles and optionally fine graphite particles; and 2) a thermoplastic resin and/or a thermosetting resin, 3) the graphite particles having an average particle diameter D1 of 55 to 65 mum, 4) the melt viscosity being 1x10<2 >to 5x10<3 >Pa.s at 320° C., and 5) the weight ratio of (the graphite particles and optionally the fine graphite particles)/(the thermoplastic resin and/or the thermosetting resin) being 95/5 to 75/25.