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. 24, 2013
Filed:
Jun. 25, 2008
Hiroyuki Morioka, Tokyo, JP;
Yasuhiro Haba, Tokyo, JP;
Saori Okada, Tokyo, JP;
Keiichi Iio, Tochigi, JP;
Hiroyuki Morioka, Tokyo, JP;
Yasuhiro Haba, Tokyo, JP;
Saori Okada, Tokyo, JP;
Keiichi Iio, Tochigi, JP;
Toppan Printing Co., Ltd., Tokyo, JP;
Abstract
[Problem] To provide a membrane and electrode assembly comprising a catalyst layer that improves water holding properties and exhibits high power generation characteristics even in low humidified conditions without inhibiting removal of the water generated by the electrode reaction, etc. and its manufacturing method. [Solution] The membrane and electrode assembly produced by sandwiching a polymer electrolyte membrane between a pair of catalyst layers is provided, in which the catalyst layer comprises a polymer electrolyte and particles carrying a catalyst material, and in which the proportion of the polymer electrolyte expressed by {(mass of polymer electrolyte)/(mass of particles in particles carrying catalyst material)} in the catalyst layer is decreased toward the polymer electrolyte membrane (the inside) from the surface of the catalyst layer (the outside).