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:
Aug. 23, 2011
Filed:
Dec. 07, 2006
Koichiro Aotani, Yokosuka, JP;
Koichiro Aotani, Yokosuka, JP;
Nissan Motor Co., Ltd., Kanagawa-Ken, JP;
Abstract
A membrane electrode assembly for a fuel cell of the present invention includes an electrolyte membrane (); and a pair of electrode catalyst layers () provided on both surfaces of the electrolyte membrane. Furthermore, in the present invention, a plurality of hydrophilic groups exist along a substantially continuous concentration gradient from a surface of one of the electrode catalyst layers opposite to a surface thereof in contact with the electrolyte membrane to a surface of the other electrode catalyst layer opposite to a surface thereof in contact with the electrolyte membrane in a thickness direction of the electrolyte membrane () and the electrode catalyst layers (). This makes it possible to provide a membrane electrode assembly with water management performed not only in the surfaces but also in the entire assembly in the thickness direction.