Patent · US Expired

Membrane for fuel cell, and fuel cell incorporating that membrane

US6878475B2 · kind B2 · utility

8Cited by

15References

27Claims

0Family size

Assignee

T/J Technologies, Inc. · US

Inventors

Michael Wixom · Ann Arbor, US
Hanwei Lei · Albuquerque, US
Pu Zhang · Ann Arbor, US
Junqing Ma · Nanjing, CN

Key dates

Filing date	Nov 21, 2003
Grant date	Apr 12, 2005
Priority date	—
Expiry date	Nov 21, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A proton exchange membrane for a fuel cell is prepared from a polyimidazole polymer having the formula: wherein R1-R3 are independently H, a halogen, an alkyl or a substituted alkyl. X1 and X2 are 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.