The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2006
Filed:
Sep. 20, 2000
Osamu Sakai, Neyagawa, JP;
Hisaaki Gyoten, Shijonawate, JP;
Hiroki Kusakabe, Sakai, JP;
Eiichi Yasumoto, Kyoto, JP;
Yasushi Sugawara, Higashiosaka, JP;
Teruhisa Kanbara, Toyonaka, JP;
Akihiko Yoshida, Hirakata, JP;
Makoto Uchida, Hirakata, JP;
Junji Morita, Moriguchi, JP;
Osamu Sakai, Neyagawa, JP;
Hisaaki Gyoten, Shijonawate, JP;
Hiroki Kusakabe, Sakai, JP;
Eiichi Yasumoto, Kyoto, JP;
Yasushi Sugawara, Higashiosaka, JP;
Teruhisa Kanbara, Toyonaka, JP;
Akihiko Yoshida, Hirakata, JP;
Makoto Uchida, Hirakata, JP;
Junji Morita, Moriguchi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A polymer electrolyte fuel cell is provided comprising: a hydrogen ion conductive polymer electrolyte membrane; an anode and a cathode sandwiching the hydrogen ion conductive polymer electrolyte membrane; an anode side electroconductive separator having a gas channel for supplying a fuel gas to the anode; a cathode side electroconductive separator having a gas channel for supplying an oxidant gas to the cathode; characterized in that the anode and the cathode comprise a gas diffusion layer and a catalyst layer formed on the gas diffusion layer at the side in contact with the hydrogen ion conductive polymer electrolyte membrane, the catalyst layer has catalyst particles and a hydrogen ion conductive polymer electrolyte, and at least either of hydrogen ion conductivity and gas permeability of at least either of the anode and the cathode varies in a thickness direction of the anode or the cathode.