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:
Nov. 16, 2004
Filed:
Feb. 15, 2002
Yasushi Sugawara, Higashiosaka, JP;
Hisaaki Gyoten, Shijonawate, JP;
Makoto Uchida, Hirakata, JP;
Eiichi Yasumoto, Kyoto, JP;
Teruhisa Kanbara, Ikeda, JP;
Junji Morita, Moriguchi, JP;
Yoshihiro Hori, Ikoma, JP;
Akihiko Yoshida, Hirakata, JP;
Hidenobu Wakita, Yawata, JP;
Hiroki Kusakabe, Sakai, JP;
Masato Hosaka, Osaka, JP;
Osamu Sakai, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present specification discloses a polymer electrolyte fuel cell characterized in that each of the cathode and the anode comprises catalyst particles, a hydrogen ion-conductive polymer electrode, a conductive porous base material and a water repellent agent, and water repellency of at least one of the cathode and the anode varies in a direction of thickness or in a plane direction. As such, by varying the degree of the water repellency of the cathode and the anode on the basis of a position, an excellent polymer electrolyte fuel cell having a high discharge characteristic or more specifically a high current-voltage characteristic in a high current density range.