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:
Oct. 05, 2010
Filed:
Mar. 06, 2007
Shintaro Tanaka, Wako, JP;
Yoichi Asano, Wako, JP;
Ryoichiro Takahashi, Wako, JP;
Takuma Yamawaki, Wako, JP;
Shintaro Tanaka, Wako, JP;
Yoichi Asano, Wako, JP;
Ryoichiro Takahashi, Wako, JP;
Takuma Yamawaki, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A membrane electrode assembly that includes a cathode electrode catalyst layer and an anode electrode catalyst layer respectively disposed on one side and the other side of a solid polymer electrolyte membrane, gas diffusion layers disposed respectively on the sides of the electrode catalyst layers; and intermediate layers having pores and disposed respectively between the electrode catalyst layer and the gas diffusion layer and between the electrode catalyst layer and the gas diffusion layer. The volume per unit area and per unit mass of the pores having pore size of 0.1 to 10 μm in the intermediate layer in the cathode side is larger than that in the intermediate layer in the anode side. The pore volume of the intermediate layer in the cathode side is 1.7 to 4.3 μl/cm/mg and that of the intermediate layer in the anode side is 0.5 to 1.4 μl/cm/mg.