Direct oxidation fuel cells with improved cathode gas diffusion media for low air stoichiometry operation
US7704629B2 · kind B2 · utility
2Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Jan 22, 2007 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Mar 19, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/742
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode for use in a direct oxidation fuel cell (DOFC) comprises a gas diffusion medium (GDM) including a backing layer and a microporous layer comprising a fluoropolymer and an electrically conductive material, wherein loading of the fluoropolymer in the microporous layer is in the range from about 10 to about 60 wt. %. In use, a concentrated solution of a liquid fuel is supplied to an anode and an oxidant to the cathode of the fuel cell, and the fuel cell may be operated at a low oxidant stoichiometry ξc not greater than about 2.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.