Silica sol composition, membrane electrode assembly with proton-exchange membrane, and fuel cell
US7371480B2 · kind B2 · utility
21Cited by
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9Claims
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Key dates
| Filing date | Mar 24, 2004 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Nov 7, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a proton-exchange membrane of which the ionic conductivity is high and the methanol crossover is low, and a fuel cell of high power that comprises the proton-exchange membrane. The proton-exchange membrane has a structure of mesogen-containing organic molecular chains and a proton-donating group-containing group covalent-bonding to a silicon-oxygen three-dimensional crosslinked matrix, in which at least a part of the organic molecular chains are oriented to form an aggregate thereof; and the fuel cell comprises the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.