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:
Feb. 13, 2024
Filed:
May. 27, 2021
Agc Inc., Tokyo, JP;
Takumi Okuyama, Tokyo, JP;
Takeshi Hirai, Tokyo, JP;
Susumu Saito, Tokyo, JP;
Chikaya Tamitsuji, Tokyo, JP;
Daisuke Jomuta, Tokyo, JP;
AGC Inc., Tokyo, JP;
Abstract
To provide a liquid composition capable of forming a membrane excellent in durability against hydrogen peroxide or peroxide radicals and excellent in hydrogen gas barrier property; a polymer electrolyte membrane; a membrane electrode assembly; and a polymer electrolyte fuel cell. Liquid composition comprising a liquid medium, an acid-type sulfonic acid group-containing fluorocarbon polymer of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10cm·cm/(s·cm·cmHg), and cerium atoms; a polymer electrolyte membranecomprising the acid-type sulfonic acid group-containing fluorocarbon polymer, and cerium atoms; and a membrane electrode assemblycomprising an anodehaving a catalyst layer, a cathodehaving a catalyst layer, and the polymer electrolyte membranedisposed between the anodeand the cathode