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. 02, 2002
Filed:
Jun. 22, 2000
Takahiro Isono, Hirakata, JP;
Yasuo Miyake, Ora-gun, JP;
Akira Hamada, Ashikaga, JP;
Minoru Kaneko, Ora-gun, JP;
Kunihiro Nakato, Ora-gun, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
The object of the present invention is to provide fuel cell including a cell that is formed by sandwiching solid polymer membrane between an anode and a cathode that generates electricity with stability and high performance by evenly moistening the solid polymer membrane. For this purpose, in a gas diffusion layer , which is positioned adjacent to a cathode catalyst layer , the content of fluororesin in an area on the side of the entrance for the oxidizer is set to be higher than in another area on the side of the exit so that the water repellency in the entrance side area is higher than in the exit side area. As a result, a water permeation suppressing part A, where the water permeability is relatively low, is formed in the area on the entrance side, while a water permeable part B, where the water permeability is relatively high, is formed in the area on the exit side.