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:
Jul. 12, 2005
Filed:
Mar. 06, 2002
Yoshihiro Hori, Ikoma, JP;
Masato Hosaka, Osaka, JP;
Junji Nikura, Hirakata, JP;
Kazuhito Hatoh, Osaka, JP;
Teruhisa Kanbara, Toyonaka, JP;
Takeshi Yonamine, Suita, JP;
Hiroaki Matsuoka, Kanonji, JP;
Yoshihiro Hori, Ikoma, JP;
Masato Hosaka, Osaka, JP;
Junji Nikura, Hirakata, JP;
Kazuhito Hatoh, Osaka, JP;
Teruhisa Kanbara, Toyonaka, JP;
Takeshi Yonamine, Suita, JP;
Hiroaki Matsuoka, Kanonji, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a polymer electrolyte fuel cell of the present invention, at least one of electrodes comprises conductive carbon carrying a platinum group metal catalyst, conductive carbon carrying no catalyst metal and a hydrogen ion-conductive polymer electrolyte. The preferable amount of the conductive carbon carrying no catalyst metal is equivalent to 5 to 50 wt % of the conductive carbon carrying the catalyst metal. Incorporation of the conductive carbon carrying no catalyst metal to the catalyst layer enables reduction in potential concentration on part of electron conduction channels in an electrode, whereby an electrode for a polymer electrolyte fuel cell having an excellent life characteristic can be provided.