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:
Jul. 02, 2013
Filed:
Nov. 24, 2004
Applicants:
Timothy J. Fuller, Pittsford, NY (US);
Beba T. Dobulis, Rochester, NY (US);
Inventors:
Timothy J. Fuller, Pittsford, NY (US);
Beba T. Dobulis, Rochester, NY (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/10 (2006.01); C08J 5/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of enhancing electrical performance of a membrane for a fuel cell is disclosed. The method includes providing a perfluorosulfonic acid (PFSA) ionomer in an aqueous hydroxylated hydrocarbon aqueous solution. The PFSA dispersion or solution has an acid number the same or higher than an acid number of the membrane. The membrane is immersed in the solution such that the high acid number PFSA dispersion diffuses into the membrane. After immersion, the removed membrane is then dried under tension.