公开(公告)号：EP1953853B1

公开(公告)日：2011-10-19

申请号：EP06833281.6

申请日：2006-11-24

申请人： Panasonic Corporation

发明人： YOSHIMURA, Mikiko ,  HORI, Yoshihiro ,  OKANISHI, Takeou ,  YAMAUCHI, Masaki

IPC分类号： H01M4/86 ,  H01M8/02 ,  H01M8/10

CPC分类号： H01M4/8636 ,  H01M4/8642 ,  H01M4/926 ,  H01M8/0263 ,  H01M8/1007 ,  H01M8/241 ,  H01M8/2483 ,  H01M2008/1095 ,  H01M2250/20 ,  H01M2300/0082 ,  Y02T90/32

摘要： The present invention provides a catalyst-coated membrane and a membrane-electrode assembly that can easily and surely achieve a polymer electrolyte fuel cell having excellent durability, in which the decomposition/degradation of a polymer electrolyte membrane can be suppressed, and a decrease in initial characteristics can be prevented sufficiently for a long period of time even when the polymer electrolyte fuel cell is frequently started and stopped. In the catalyst-coated membrane that includes an anode catalyst layer, a cathode catalyst layer, and a hydrogen ion conductive polymer electrolyte membrane interposed between the anode catalyst layer and the cathode catalyst layer, a peripheral area of at least one of the anode catalyst layer and the cathode catalyst layer is provided with a decrease portion in which the mass of the electrode catalyst per unit area of the catalyst layer decreases from the inner side toward the outer side.