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. 25, 2011
Filed:
Jan. 11, 2006
Paul Alan Benson, Leicestershire, GB;
Paul Alan Benson, Leicestershire, GB;
Intelligent Energy Limited, Leicestershire, GB;
Abstract
An electrochemical fuel cell includes a membrane-electrode assembly (MEA) having a cathode face and an anode face. The MEA is between a cathode fluid flow field plate and an anode fluid flow field plate. A diffusion structure is between the MEA and a corresponding fluid flow field plate, which is either the cathode fluid flow field plate or the anode fluid flow field plate. The diffusion structure has a first face in contact with, or adjacent to, the MEA and a second face in contact with, or adjacent to, the corresponding fluid flow field plate. The diffusion structure includes a first layer having a first level of hydrophobicity and a second layer that is hydrophilic. The second layer is adjacent to the corresponding fluid flow field plate, and includes a hydrophilic binder material.