Fuel cells with hydrophobic diffusion medium
US7722979B2 · kind B2 · utility
1Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 14, 2005 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Mar 11, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Diffusion media for use in PEM fuel cells are provided with silicone coatings. The media are made of a porous electroconductive substrate, a first hydrophobic fluorocarbon polymer coating adhered to the substrate, and a second coating comprising a hydrophobic silicone polymer adhered to the substrate. The substrate is preferably a carbon fiber paper, the hydrophobic fluorocarbon polymer is PTFE or similar polymer, and the silicone is moisture curable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.