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:
Apr. 07, 2015
Filed:
Jul. 17, 2012
Haruhiko Shintani, Osaka, JP;
Toshifumi Ueda, Osaka, JP;
Masaki Yamauchi, Osaka, JP;
Abstract
A method of fabricating a membrane electrode assembly, comprising: obtaining a mixture by mixing and kneading electrically conductive particles, a polymer resin, a surfactant, and a dispersion solvent (S); obtaining a sheet-like mixture by rolling out and shaping the mixture (S); obtaining a carbon sheet by heat-treating the sheet-like mixture at a first heat treatment temperature such that the surfactant and the dispersion solvent are removed from the sheet-like mixture (S); obtaining a dispersion liquid by mixing electrically conductive particles, a polymer resin, a surfactant, and a dispersion solvent (S); forming, on the carbon sheet, a dispersion liquid layer thinner than the carbon sheet by forming and drying a coating of the dispersion liquid on the carbon sheet (S); obtaining a gas diffusion layer in which a carbon layer is formed on the carbon sheet, by heat-treating the carbon sheet on which the dispersion liquid layer is formed at a second heat treatment temperature lower than the first heat treatment temperature such that the surfactant and the dispersion solvent are removed from the dispersion liquid layer (S); and stacking a catalyst layer and an electrolyte membrane in said order on the carbon layer (S).