Material compositions and methods for porous graphite-polymer composite bipolar plates
US11811102B2 · kind B2 · utility
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Key dates
| Filing date | Sep 3, 2019 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Sep 3, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides compositions and a process for the preparation of porous bipolar plates with pore volume density and pore size that can result in high water uptake by the plates while providing the desired resistance against gas permeation. The combination of porogens (pore-forming agents) with specific types of graphite particles and polymer binders provides the desired characteristics. The porous bipolar plates have high electrical conductivity and flexural strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.