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:
Apr. 12, 2005
Filed:
Nov. 21, 2003
Applicants:
Michael Wixom, Ann Arbor, MI (US);
Hanwei Lei, Ann Arbor, MI (US);
Pu Zhang, Ann Arbor, MI (US);
Junqing MA, Ann Arbor, MI (US);
Inventors:
Michael Wixom, Ann Arbor, MI (US);
Hanwei Lei, Ann Arbor, MI (US);
Pu Zhang, Ann Arbor, MI (US);
Junqing Ma, Ann Arbor, MI (US);
Assignee:
T/J Technologies, Inc., Ann Arbor, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
H01M008/10 ;
U.S. Cl.
CPC ...
Abstract
A proton exchange membrane for a fuel cell is prepared from a polyimidazole polymer having the formula:wherein R-Rare independently H, a halogen, an alkyl or a substituted alkyl. Xand Xare independently or an electron withdrawing group such as CN. The membrane may be doped to alter its conductivity. The membrane may be prepared from a copolymer of the polyimidazole. Also disclosed is a fuel cell incorporating the membrane.