Patent ID: 6921598

Claim:
A polymer electrolyte fuel cell comprising: an electrolyte membrane-electrode assembly including an anode, a cathode and a polymer electrolyte membrane interposed therebetween; an anode-side conductive separator plate having a gas flow channel for supplying a fuel gas to said anode; a cathode-side conductive separator plate having a gas flow channel for supplying an oxidant gas to said cathode; a coolant flow channel formed between specific anode-side conductive separator plate and cathode-side conductive separator plate; and means for supplying a fuel gas, an oxidant gas and a coolant to each of said gas flow channels and coolant flow channel, respectively wherein said conductive separator plates comprise a molded body of a mixture comprising a conductive carbon having a hydrophilic functional group at least in a portion of a surface thereof and a binder.