Polymer electrolyte membrane, membrane electrode assembly, and solid polymer electrolyte fuel cell
US11211626B2 · kind B2 · utility
1Cited by
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19Claims
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Key dates
| Filing date | May 11, 2017 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Mar 9, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polymer electrolyte membrane of the present disclosure comprises a perfluorosulfonic acid resin (A), wherein the polymer electrolyte membrane has a phase-separation structure having a phase where fluorine atoms are detected in majority and a phase where carbon atoms are detected in majority, in an image of a membrane surface observed under an SEM-EDX, and the polymer electrolyte membrane has a phase having an average aspect ratio of 1.5 or more and 10 or less in an image of a membrane cross-section observed under an SEM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.