Anion exchange polymers and membranes for electrolysis
US11980879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2021 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Dec 7, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/133
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Anion exchange polymers having high OH− conductivity, chemical stability, and mechanical stability have been developed for use in AEMs. The anion exchange polymers have stable hydrophobic polymer backbones, stable hydrophilic quaternary ammonium cationic groups, and hydrophilic phenolic hydroxyl groups on the polymer side chains. The polymers have polymer backbones free of ether bonds, hydrophilic polymer side chains, and piperidinium ion-conducting functionality, which enables efficient and stable operation in water or CO2 electrolysis, redox flow battery, and fuel cell applications. The polymer comprises a plurality of repeating units of formula (I)Anion exchange membranes and membrane electrode assemblies incorporating the anion exchange polymers are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.