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. 02, 2020
Filed:
May. 11, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Noriyuki Kitao, Shizuoka-ken, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
A fuel cell includes: an electrolyte membrane; an anode catalyst layer; a cathode catalyst layer; and a cathode gas diffusion layer. The cathode catalyst layer includes an ionomer, the ionomer includes copolymers each of which has a hydrophilic block. The hydrophilic block is positioned at a terminal of a copolymer which includes a hydrophobic portion and a hydrophilic portion having a sulfonic acid group. The hydrophilic block has an aggregated structure of the hydrophilic portion. A gas diffusion resistance coefficient of the cathode gas diffusion layer is 3.2×10m or lower. The gas diffusion resistance coefficient is expressed by 'Gas Diffusion Resistance Coefficient=Thickness of Cathode Gas Diffusion Layer/(Porosity of Cathode Gas Diffusion Layer)'.