Patent ID: 6803137
Filing Date: 2004-10-12
Classification: H01M,Y02E

Abstract:
A solid polymer fuel cell comprising a plurality of unit cells stacked one after another, said unit cell comprising an anion exchange membrane and a cation exchange membrane disposed adjacent but not in contact with one another wherein a separation zone is disposed between said anion exchange membrane and said cation exchange membrane, and wherein a catalyst layer and a hydrogen electrode is disposed on one side of said anion exchange membrane and a catalyst layer and an oxygen electrode is disposed on the other side of said anion exchange membrane, wherein a catalyst layer and a hydrogen electrode is disposed on one side of said cation exchange membrane and a catalyst layer and an oxygen electrode is disposed on the other side of said cation exchange membrane, gas diffusion layers commonly disposed on both sides of said anion exchange membrane and said cation exchange membrane for allowing electrons generated on each of the catalyst layers of the hydrogen electrode and the oxygen electrode to pass, and a gas channel disposed outside said gas diffusion layers and which crosses the portion of the gas diffusion layers contiguous to said anion exchange membrane and the portion of the gas diffusion layers contiguous to said cation exchange membrane so as to connect both of the portions, in which the gas channel on one side of said membranes is for feeding hydrogen to the hydrogen electrode while the gas channel on the other side is for feeding oxygen to the oxygen electrode, wherein said gas channel is disposed on an interrconnector.