Electrolyte polymers for lithium rechargeable batteries
US6630271B1 · kind B1 · utility
15Cited by
7References
7Claims
0Family size
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Key dates
| Filing date | Feb 2, 2000 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Feb 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Use of vinylidenfluoride (VDF) copolymers for preparing electrolyte polymers, wherein the VDF copolymers have the following polymeric structure (I):(CH2—CF2)m—(CXY—C(ORf)Z)n—(CF2—CF(CF3))p) wherein:Rf is a perfluoroalkyl group having from 1 to 3 carbon atoms;X, Y, and Z equal to or different from each other are selected from F, Cl or H; m,n and p are integers, n or p can be 0 but not simultaneously;said VDF copolymers being obtainable by emulsion polymerization at 75-120° C., preferably 95°-120° C., in the presence of organic initiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.