Polymer electrolytic material, polymer electrolytic part, membrane electrode assembly, and polymer electrolyte fuel cell
US7713449B2 · kind B2 · utility
6Cited by
10References
39Claims
0Family size
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Key dates
| Filing date | Mar 5, 2004 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Jul 3, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polymer electrolytic material has excellent proton conductivity and excellent fuel shutting property, and accordingly provide a polymer electrolytic fuel cell with a high efficiency. This polymer electrolytic material has an unfreezable water ratio Rw1 defined by the following expression (S1) in a range of 20 to 100% by weight in hydrated state:Rw1=[Wnf/Wfc+Wnf)]×100 (S1)in which Wnf represents the unfreezable water content per 1 g of the polymer electrolytic material in dry state and Wfc represents the low freezing point water content per 1 g of the polymer electrolytic material in dry state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.