Crosslinking of hydroxide stable, polybenzimidazoliums and polyimidazoliums membranes and ionomers
US11230626B2 · kind B2 · utility
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Key dates
| Filing date | Aug 1, 2017 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Mar 11, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Described herein are crosslinked alkylated poly(benzimidazole) and poly(imidazole) polymer materials and devices (e.g., fuel cells, water electrolyzers) including these polymer materials. The polymer materials can be prepared in a convenient manner, allowing for applications such as anion exchange membranes (AEMs). The membranes provide high anion conductivities over a wider range of operating conditions when compared to the analogous membranes that are not cross-linked. The crosslinked polymer materials have improved alkaline stability, when compared to the analogous non-crosslinked polymer materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.