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:
May. 26, 2009
Filed:
Dec. 17, 2003
Neil R. Andrews, North Vancouver, CA;
Shanna D. Knights, Burnaby, CA;
Kenneth A. Murray, Port Coquitlam, CA;
Scott J. Mcdermid, Vancouver, CA;
Sean M. Mackinnon, Burnaby, CA;
Siyu YE, Burnaby, CA;
Neil R. Andrews, North Vancouver, CA;
Shanna D. Knights, Burnaby, CA;
Kenneth A. Murray, Port Coquitlam, CA;
Scott J. McDermid, Vancouver, CA;
Sean M. MacKinnon, Burnaby, CA;
Siyu Ye, Burnaby, CA;
BDF IP Holdings Ltd., Vancouver, BC, CA;
Abstract
A significant problem in PEM fuel cell durability is in premature failure of the ion-exchange membrane and in particular by the degradation of the ion-exchange membrane by reactive hydrogen peroxide species. Such degradation can be reduced or eliminated by the presence of an additive in the anode, cathode or ion-exchange membrane. The additive may be a radical scavenger, a membrane cross-linker, a hydrogen peroxide decomposition catalyst and/or a hydrogen peroxide stabilizer. The presence of the additive in the membrane electrode assembly (MEA) may however result in reduced performance of the PEM fuel cell. Accordingly, it may be desirable to restrict the location of the additive to locations of increased susceptibility to membrane degradation such as the inlet and/or outlet regions of the MEA.