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:
Mar. 31, 2015
Filed:
Mar. 12, 2009
Kohei Kita, Tokyo, JP;
Takahiko Murai, Tokyo, JP;
Naoki Sakamoto, Tokyo, JP;
Naoto Miyake, Tokyo, JP;
Tadashi Ino, Osaka, JP;
Noriyuki Shinoki, Osaka, JP;
Masaharu Nakazawa, Osaka, JP;
Masahiro Kondo, Osaka, JP;
Takashi Yoshimura, Osaka, JP;
Kohei Kita, Tokyo, JP;
Takahiko Murai, Tokyo, JP;
Naoki Sakamoto, Tokyo, JP;
Naoto Miyake, Tokyo, JP;
Tadashi Ino, Osaka, JP;
Noriyuki Shinoki, Osaka, JP;
Masaharu Nakazawa, Osaka, JP;
Masahiro Kondo, Osaka, JP;
Takashi Yoshimura, Osaka, JP;
Asahi Kasei E-Materials Corporation, Tokyo, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention provides an electrolyte having high conductivity even under high-temperature low-humidification conditions (e.g. at a temperature of 100 to 120° C. and a humidity of 20 to 50% RH) and thereby makes it possible to realize a higher performance fuel cell. The present invention is a fluoropolymer electrolyte having an equivalent weight (EW) of not less than 250 but not more than 700 and a proton conductivity of not lower than 0.10 S/cm as measured at a temperature of 110° C. and a relative humidity of 50% RH and comprising a COOZ group- or SOZ group-containing monomer unit, wherein Z represents an alkali metal, an alkaline earth metal, hydrogen atom or NRRRRin which R, R, Rand Reach independently represents an alkyl group containing 1 to 3 carbon atoms or hydrogen atom.