Fluorine-substituted cyclic carbonate and electrolytic...

C - Chemistry – Metallurgy – 07 – D

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C07D 317/36 (2006.01) H01M 6/16 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2197085

Monofluoromethylethylene carbonate, difluoromethylethylene carbonate and trifluoromethylethylene carbonate, each being a novel compound that is chemically and physically stable, has a high permittivity, can well dissolve organic substances, and can be used in a wide temperature range, thus being useful as a solvent. Further these compounds are excellent in withstand voltage and charge-discharge cycle characteristics as a nonaqueous electrolyte solution, have a high flashing point and an excellent safety, and can provide batteries excellent in withstand voltage and charge-discharge cycle characteristics.

La présente invention concerne les nouveaux composés carbonate de monofluorométhylène, carbonate de difluorométhyléthylène et carbonate de trifluorométhyléthylène, de tels carbonates étant chacun chimiquement et physiquement stables. Faisant preuve d'une permittivité élevée, ce type de composé permet une dissolution correcte des substances organiques, et, pouvant s'utiliser dans une plage de température étendue, il constitue un excellent solvant. Ces composés présentent en outre de bonnes qualités quant à la résistance à la tension électrique. Les caractéristiques des cycles charge/décharge de tels composés les rendent particulièrement aptes à l'utilisation comme solution d'électrolyte non aqueuse. Présentant un point d'éclair élevé, ces composés garantissent une excellente sécurité. Enfin, ces composés permettent la réalisation de batteries présentant une excellente résistance à la tension électrique et de bonnes caractéristiques des cycles charge/décharge.

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