Additive for non-aqueous liquid electrolyte, non-aqueous...

H - Electricity – 01 – M

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H01M 10/0567 (2010.01) H01G 9/038 (2006.01) H01M 6/16 (2006.01)

Patent

CA 2423842

The present invention provides an additive for a non-aqueous electrolyte comprising a phosphazene derivative represented by the following formula (1) : (PNR2)n ....... formula (1) wherein R represents a fluorine-containing substituent or fluorine, at least one of all R's is a fluorine-containing substituent, and n represents 3 to 14. More particularly, the present invention provides a non-aqueous electrolyte secondary cell and a non-aqueous electrolyte electric double layer capacitor comprising the additive for a non-aqueous electrolyte which exhibit good low temperature characteristics, good resistance to deterioration, and good incombustibility, and accordingly are significantly high in safety.

L'invention concerne un additif pour électrolyte liquide non aqueux caractérisé en ce qu'il comprend un dérivé phosphazène représenté par la formule (1) (PNR¿2?)¿n?, dans laquelle R représente un atome de fluor ou un substituant contenant du fluor, à condition qu'au moins tous les R' représentent un substituant contenant du fluor, et n est compris entre 3 et 14; une cellule secondaire d'électrolyte liquide non aqueux et un condensateur électrique d'électrolyte liquide non aqueux à double couche comprenant l'additif pour électrolyte liquide non aqueux possédant d'excellentes caractéristiques à basse température, une bonne résistance à la détérioration et à la combustion, et présentant donc une sécurité significative élevée. Le substituant est, de préférence, un groupe alcoxy.

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