Sulphonated polyimides, membranes prepared with them, and a fuel cell device that includes these membranes
US6425944B2 · kind B2 · utility
13Cited by
2References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.