Polymer electrolyte for solid polymer type fuel cell and fuel cell
US7258941B2 · kind B2 · utility
8Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2002 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Feb 18, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyelectrolyte for a solid polymeric fuel cell comprising an aromatic polyether sulfone block copolymer comprising a hydrophilic segment containing sulfonic acid groups and a hydrophobic segment having no sulfonic acid group at a hydrophilic segment weight fraction W2 to hydrophobic segment weight fraction W1 ratio falling within a range of 0.6<W2/W1<2.0. The polyelectrolyte for a solid polymeric fuel cell is inexpensive and durable, and its proton conductivity is less influenced by humidity and temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.