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:
Aug. 19, 2014
Filed:
Jul. 31, 2008
Takaaki Nakagawa, Kanagawa, JP;
Hideki Sakai, Kanagawa, JP;
Hideyuki Kumita, Kanagawa, JP;
Masaya Kakuta, Kanagawa, JP;
Takaaki Nakagawa, Kanagawa, JP;
Hideki Sakai, Kanagawa, JP;
Hideyuki Kumita, Kanagawa, JP;
Masaya Kakuta, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
Provided is a fuel cell having a structure in which a cathode and an anode face each other with a proton conductor therebetween. In this fuel cell, an oxygen reductase or the like is immobilized on at least the cathode, and the cathode is composed of a material having pores therein such as porous carbon. In this fuel cell, the volume of water contained in the cathode is controlled to be 70% or less of the volume of the pores of the cathode, whereby a high current value can be stably obtained through optimization of the amount of moisture contained in the cathode when an enzyme is immobilized on at least the cathode. Also provided is a method for operating the fuel cell.