Nonaqueous electrolytic solution and lithium secondary battery

Details Nonaqueous electrolytic solution and lithium secondary battery Nonaqueous electrolytic solution and lithium secondary battery

2006-08-01

2006-08-01

Bell, Bruce F. (Department: 1746)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S324000, C429S326000, C429S342000, C429S231900, C429S231950, C252S062200

Reexamination Certificate

active

07083878

ABSTRACT:
An object of the invention is to provide such a battery that has a high capacity, is excellent in storage characteristics, cycle characteristics and continuous charging characteristics, and is small in gas generation amount, whereby size reduction and improvement in performance of a lithium secondary battery can be attained.The present invention relates to a nonaqueous electrolytic solution comprising a lithium salt and a nonaqueous solvent dissolving the same, wherein the electrolytic solution contains, as the lithium salt, LiPF6in a concentration of from 0.2 to 2 mole/L, and LiBF4and/or a compound represented by the following formula (1) in a molar ratio of from 0.005 to 0.4 with respect to LiPF6, and the nonaqueous solvent mainly comprises (1) ethylene carbonate and/or propylene carbonate, (2-1) a symmetric linear carbonate, (2-2) an asymmetric linear carbonate, and (3) vinylene carbonate.

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