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US 7,067,219 B2Granted
Additive for nonaqueous-electrolyte secondary battery
AssigneeBridgestone Corporation
InventorsMasashi Otsuki, Shigeki Endo, Takao Ogino
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AssigneeBridgestone Corporation
InventorsMasashi Otsuki, Shigeki Endo, Takao Ogino
Estimating the term…
The present invention provides an additive which is able to make a non-aqueous-electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor which is excellent in low-temperature characteristics, while maintaining a necessary cell properties, and a non-aqueous-electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor that contains therein the additive. The additive contains at least one of tautomers of phosphazene derivatives represented by formulae (1) and (2): wherein R1, R2 and R3 independently represent a monovalent substituent or a halogen element; X represents a substituent containing at least one selected from a group of carbon, silicon, germanium, tin, nitrogen, phosphorus, arsenic, antimony, bismuth, oxygen, sulfur, selenium, tellurium and polonium; and Y1 and Y2 independently represent a divalent connecting group, a divalent element or a single bond.
An additive used for a non-aqueous electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor containing at least a compound represented by the following formula (1) and a phosphazene derivative represented by the following formula (2):
A non-aqueous electrolyte secondary cell comprising an additive for a non-aqueous electrolyte secondary cell comprising:
A non-aqueous electrolyte electric double layer capacitor comprising an additive for a non-aqueous electrolyte secondary cell comprising:
Dependencies are inferred from the claim text.