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. 09, 2013
Filed:
Jul. 18, 2008
Tetsuo Nagami, Nagoya, JP;
Sozaburo Ohashi, Nagoya, JP;
Yuichiro Sugiyama, Susono, JP;
Mikihiro Hori, Toyota, JP;
Tetsuo Nagami, Nagoya, JP;
Sozaburo Ohashi, Nagoya, JP;
Yuichiro Sugiyama, Susono, JP;
Mikihiro Hori, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
The present invention specifies the physical property valves of a catalytic layer correlating with the performance of a fuel cell, and provides the catalytic layer having the physical proper values and a fuel cell. Specifically, in a fuel cell having a membrane-electrode assembly provided with a catalytic layeron each side of an electrolyte membrane, an electrode powder constituting the catalytic layershall have an amount of adsorbed water vapor in a range of 52 to 70 cm(STP)/g by a value measured when the water-vapor partial pressure is 0.6, which is determined from the adsorption isotherm of water. The fuel cell having the catalytic layer with the use of the electrode powder having the amount of adsorbed water vapor in this range has the output performance of 0.6 A/cmor higher by current density at 0.6 V, in a less humidified condition and a more humidified condition.