Copolymers of PEO and fluorinated polymers as electrolytes for lithium batteries
US10044063B2 · kind B2 · utility
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Key dates
| Filing date | May 25, 2016 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Jun 22, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Syntheses of alternating copolymers based on PEO and fluorinated polymers are described. Introduction of fluorinated polymer chains reduces the Tm of PEO and also increases the affinity and miscibility with ionic liquids, which improves ionic conductivity even at room temperature. The disclosed polymers containing PFPE have superior safety and are more flame retardant as compared to traditional electrolytes. Such alternating copolymers can be used as solid or gel electrolytes in Li batteries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.