Electrode for fuel cell and a method for producing the electrode

Abstract

Two electrodes contact an electrolyte membrane on both sides of the electrolyte membrane and each electrode contacts each separator on the other side of the electrode. An electrochemical fuel cell comprises a plurality of unit cells which comprise the electrolyte membrane, the electrode, and the separator. The electrode comprises a catalyst layer and a gas diffusion layer. The gas diffusion layer comprises an inner layer and an outer layer. The catalyst layer contacts the electrolyte membrane. The inner layer is interposed between the catalyst layer and the outer layer. The outer layer of the gas diffusion layer contacts the inner layer on the inner side and the separator on the outer side. Since the gas diffusion layer is formed as a double-layer structure which includes the inner layer having low electric resistance and close and fine structure made of carbon powder and the porous outer layer having a high water repellency, a gas diffusion ability, a water repellency, an electric collection ability of the electrode can be improved.

Dependencies are inferred from the claim text.