Membrane electrode assembly for fuel cell, fuel cell, and fuel cell system
US8206877B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Nov 28, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A membrane electrode assembly includes an ion conducting membrane; an anode catalyst layer arranged on one side of the ion conducting membrane; a cathode catalyst layer arranged on the other side of the ion conducting membrane; an anode diffusion layer arranged on an outer side of the anode catalyst layer; and a cathode diffusion layer arranged on an outer side of the cathode catalyst layer. Only in the anode catalyst layer, the density of a first catalyst layer portion located close to the anode diffusion layer is smaller than the density of a second catalyst layer portion located close to the ion conducting membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.