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:
Dec. 03, 2013
Filed:
Nov. 01, 2011
Atsuhiko Onuma, Hitachi, JP;
Jun Kawaji, Hitachinaka, JP;
Shuichi Suzuki, Hitachinaka, JP;
Yoshiyuki Takamori, Hitachinaka, JP;
Atsuhiko Onuma, Hitachi, JP;
Jun Kawaji, Hitachinaka, JP;
Shuichi Suzuki, Hitachinaka, JP;
Yoshiyuki Takamori, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is a fuel cell in which a membrane electrode assembly less undergoes increase in ion conduction resistance, and a polymer electrolyte membrane less undergoes deterioration. Specifically, the polymer electrolyte membrane includes a first membrane and a second membrane being two different membranes composed of polymer electrolytes having different ion-exchange capacities, in which the first membrane has an area of one surface thereof equal to or larger than an area of one surface of an anode or a cathode, and the second membrane has an area of one surface thereof smaller than that of the first membrane and is arranged in a gas inflow region on a side being in contact with the cathode. The second membrane has an ion-exchange capacity smaller than that of the first membrane or has a number-average molecular weight larger than that of the first membrane.