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:
May. 19, 2009
Filed:
Oct. 27, 2004
Osamu Hiroi, Tokyo, JP;
Hisatoshi Fukumoto, Tokyo, JP;
Shoji Yoshioka, Tokyo, JP;
Hideo Maeda, Tokyo, JP;
Hiroaki Urushibata, Tokyo, JP;
Hironori Kuriki, Toyko, JP;
Takashi Nishimura, Tokyo, JP;
Osamu Hiroi, Tokyo, JP;
Hisatoshi Fukumoto, Tokyo, JP;
Shoji Yoshioka, Tokyo, JP;
Hideo Maeda, Tokyo, JP;
Hiroaki Urushibata, Tokyo, JP;
Hironori Kuriki, Toyko, JP;
Takashi Nishimura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A fuel cell includes a solid polymer electrolyte membrane and cathode and anode catalyst layers held between a fuel electrode substrate having a surface area larger than that of the cathode catalyst layer and an oxidizer electrode substrate having a surface area larger than that of the anode catalyst layer. The fuel electrode substrate includes a fuel-sealing support portion surrounding the cathode catalyst layer. The oxidizer electrode substrate includes an oxidizer-sealing support portion surrounding the anode catalyst layer. The fuel-sealing and oxidizer-sealing support portions each include pores partially or wholly filled with a resin. The fuel-sealing support portion is bonded to the membrane by the resin at a position closer to an outer edge of the membrane than is the cathode catalyst. The oxidizer-sealing support portion is bonded to the membrane by the resin at a position closer to the outer edge of the membrane than is the anode catalyst.