Patent ID: 7097932
Filing Date: 2006-08-29
Classification: H01M,Y02B,Y02E,Y02P,Y02T,Y10T

Abstract:
1. A polymer electrolyte fuel cell comprising: a hydrogen ion conductive polymer electrolyte membrane; an anode and a cathode sandwiching said hydrogen ion conductive polymer electrolyte membrane; an anode side electroconductive separator having a gas channel for supplying a fuel gas to said anode; a cathode side electroconductive separator having a gas channel for supplying an oxidant gas to said cathode; characterized in that said anode and said cathode comprise a gas diffusion layer and a catalyst layer formed on said gas diffusion layer at the side in contact with said hydrogen ion conductive polymer electrolyte membrane, and said catalyst layer has catalyst particles and a hydrogen ion conductive polymer electrolyte, wherein the amount of said hydrogen ion conductive polymer electrolyte in said catalyst layer is large at the side of said hydrogen ion conductive polymer electrolyte membrane and is small at the side of said gas diffusion layer, said amount of said hydrogen ion conductive polymer electrolyte varies seamlessly in a thickness direction of said anode or said cathode.