Patent ID: 7763393

Claim:
A fuel cell, comprising: a fuel electrode and an oxidant electrode disposed to sandwich a solid polymer electrolyte membrane; current collecting plates disposed outside of the fuel electrode and the oxidant electrode; a fuel electrode channel member disposed outside of the current collecting plate disposed outside of the fuel electrode; and an oxidant electrode channel member disposed outside of the current collecting plate disposed outside of the oxidant electrode, wherein the fuel electrode and the oxidant electrode are repeatedly stacked such that the fuel electrodes are opposed to each other while sandwiching the fuel electrode channel member and the oxidant electrodes are opposed to each other while sandwiching the oxidant electrode channel member, the current collecting plate comprises a collecting surface comprising a collecting part comprising plural through-holes, and an insulating surface to function as an electrical insulation, and the collecting surface opposed to the fuel electrode or the oxidant electrode and the insulating surface opposed to the fuel electrode channel member or the oxidant electrode channel member, the fuel electrode channel member and the oxidant electrode channel member each allow a fuel and an oxidant to be supplied to the fuel electrode and the oxidant electrode, respectively, through the through-holes of the current collecting plate, and the oxidant electrode channel member comprises a thickness of not less than 1.2 mm, wherein the oxidant electrode channel member comprises a comb-teeth shape to define an oxidant electrode channel, the comb-teeth shape is exposed and opened to outside at its both edges to allow the oxidant to enter and exit the oxidant electrode channel, and the oxidant electrode channel member comprises two or more openings at each of its both edges.