Polymer electrolyte membrane, method for producing the same, and proton conductivity evaluation method for polymer electrolyte membrane
US7973088B2 · kind B2 · utility
6Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Aug 23, 2007 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Sep 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a polymer electrolyte membrane with excellent proton conductivity in its thickness direction. Preferably, the polymer electrolyte membrane containing a polymer compound comprising an ionic segment having an ionic functional group and a nonionic segment having substantially no ionic functional group, and the phase containing ionic segments as a main component and the phase containing nonionic segments as a main component are phase-separated, and in the surface region thereof, the change in the amount of the ionic segment from the surface toward the interior substantially decreases monotonically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.