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. 04, 2009
Filed:
Sep. 24, 2004
David Frank, Scarborough, CA;
Nathaniel Ian Joos, Toronto, CA;
Mario Dzamarija, Toronto, CA;
Raymond Candido, Toronto, CA;
Rami Michel Abouatallah, Toronto, CA;
David Frank, Scarborough, CA;
Nathaniel Ian Joos, Toronto, CA;
Mario Dzamarija, Toronto, CA;
Raymond Candido, Toronto, CA;
Rami Michel Abouatallah, Toronto, CA;
Hydrogenics Corporation, Mississauga, ON, CA;
Abstract
An electrochemical cell assembly includes first and second flow field plates, first and second gas diffusion media disposed between the first and second flow field plates, and a membrane electrode assembly disposed between the first and second gas diffusion media. The membrane electrode assembly can include a proton exchange membrane, and a catalyst layer on the proton exchange membrane. The catalyst layout can be configured to omit the catalyst layer from a portion of the proton exchange membrane adjacent an edge region of one of the first and second gas diffusion media, thereby enabling at least a portion of the reactant fluid flow to first encounter a region of the membrane electrode assembly without the catalyst layer. The modified catalyst layout can improve reactant fluid flow along the membrane electrode assembly, reduce wear on the membrane electrode assembly and improve electrochemical cell efficiency during operation.