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:
Jul. 20, 2010
Filed:
Mar. 09, 2006
Wu Mei, Yokohama, JP;
Miho Maruyama, Yokohama, JP;
Jun Tamura, Yokohama, JP;
Yoshihiro Akasaka, Kawasaki, JP;
Yoshihiko Nakano, Yokohama, JP;
Wu Mei, Yokohama, JP;
Miho Maruyama, Yokohama, JP;
Jun Tamura, Yokohama, JP;
Yoshihiro Akasaka, Kawasaki, JP;
Yoshihiko Nakano, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A cathode includes a diffusion layer, and a porous catalyst layer provided on the diffusion layer. The porous catalyst layer has a thickness not greater than 60 μm, a porosity of 30 to 70% and a pore diameter distribution including a peak in a range of 20 to 200 nm of a pore diameter. A volume of pores having a diameter of 20 to 200 nm is not less than 50% of a pore volume of the porous catalyst layer. The porous catalyst layer contains a supported catalyst comprising 10 to 30% by weight of a fibrous supported catalyst and 70 to 90% by weight of a granular supported catalyst. The fibrous supported catalyst includes a carbon nanofiber having a herringbone structure or a platelet structure. The granular supported catalyst includes a carbon black having 200 to 600 mL/100 g of a dibutyl phthalate (DBP) absorption value.