Additive for nonaqueous-electrolyte secondary battery

Details Additive for nonaqueous-electrolyte secondary battery Additive for nonaqueous-electrolyte secondary battery

2006-06-27

2006-06-27

Yuan, Dah-Wei (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S306000, C429S324000

Reexamination Certificate

active

07067219

ABSTRACT:
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, R2and R3independently 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 Y1and Y2independently represent a divalent connecting group, a divalent element or a single bond.

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