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:
Jun. 04, 2013
Filed:
Jun. 25, 2003
Masataka Nakamura, Shiga, JP;
Naoki Shimoyama, Shiga, JP;
Daisuke Izuhara, Kyoto, JP;
Shunji Kono, Shiga, JP;
Masayuki Kidai, Shiga, JP;
Masataka Nakamura, Shiga, JP;
Naoki Shimoyama, Shiga, JP;
Daisuke Izuhara, Kyoto, JP;
Shunji Kono, Shiga, JP;
Masayuki Kidai, Shiga, JP;
TORAY Industries, Inc., Tokyo, JP;
Abstract
The present invention relates to a polymer electrolyte that provides high proton conductivity and low fuel crossover at the same time, as well as a member using the same. The embodiments of the invention can achieve high output and high energy density in the form of a polymer electrolyte fuel cell. A polymer electrolyte comprising a proton conductive polymer (A) and a polymer (B) which is different from (A) wherein a ratio of the amount of unfreezable water, represented by formula (S1), in said polymer electrolyte is no less than 40 wt % and no greater than 100 wt % is disclosed. The ratio of amount of unfreezable water (S1)=(amount of unfreezable water)/(amount of low melting point water+amount of unfreezable water)×100 (%).