Patent ID: 7008714
Filing Date: 2006-03-07
Classification: H01B,H01M,Y02E

Abstract:
1. A polymer electrolyte fuel cell comprising: a hydrogen ion conductive polymer electrolyte membrane; an anode and a cathode for sandwiching therebetween said hydrogen ion conductive polymer electrolyte membrane; an anode side electrically conductive separator having a gas flow channel for supplying a fuel gas to said anode and a cathode side electrically conductive separator having a gas flow channel for supplying an oxidant gas to said cathode, characterized in that each of said anode side and cathode side electrically conductive separators comprises an electrically conductive gas tight elastic body having acid resistance and comprising: (a) a polymer elastic body as a base material which has, as a principal chain backbone, polyisobutylene represented by formula (1); and (b) at least an inorganic electrically conductive agent mixed with said base material: where X and Y are polymerizable functional groups, and m is an integer of 1 or above, representing repetition number of isobutylene oligomer, and wherein a ratio of an amount of the base material to an amount of the inorganic electrically conductive agent is 90 to 30 wt % to 10 to 70 wt %.