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:
Mar. 31, 2015
Filed:
Aug. 05, 2005
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:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 8/10 (2006.01); C08J 5/22 (2006.01); H01M 8/04 (2006.01);
U.S. Cl.
CPC ...
C08J 5/2243 (2013.01); H01M 8/1023 (2013.01); H01M 8/1039 (2013.01); H01M 8/1067 (2013.01); H01M 8/1072 (2013.01); H01M 8/1081 (2013.01); H01M 8/04164 (2013.01); H01M 8/04291 (2013.01); Y02E 60/521 (2013.01); C08J 2381/06 (2013.01);
Abstract
New proton conducting membranes are made of perfluorosulfonic acid polymers films that have been treated by exposing them to a chlorosulfonating agent. The membranes are used as a proton exchange membrane in PEM fuel cells operating at temperatures above 95° C., or at low relative humidity. In various embodiments, the treated films have superior physical properties such as tensile strength, when compared to an untreated film. In some embodiments, the ion exchange capacity (IEC) of the treated films is increased.