Nonaqueous electrolyte secondary battery

Details Nonaqueous electrolyte secondary battery Nonaqueous electrolyte secondary battery

2006-02-07

2006-02-07

Maples, John S. (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S330000, C429S231800

Reexamination Certificate

active

06994936

ABSTRACT:
The present invention is characterized in that a nonaqueous electrolyte contains a sultone compound having unsaturated bonds, and the present invention thereby aims at suppressing the swelling of a nonaqueous electrolyte secondary battery, as represented by a lithium secondary battery, after being allowed to stand at a high temperature and at obtaining an excellent high temperature standing performance. Furthermore, by making the nonaqueous electrolyte contain, in addition to the sultone compound containing unsaturated bonds, a vinylene carbonate derivative in 1.0 wt % or below, and/or a cyclic sulfate in 2.0 wt % or below, there can be obtain a nonaqueous electrolyte secondary battery which prevents the initial discharge capacity degradation, occurring when the addition amount of the sultone compound having unsaturated bonds is increased, and has an excellent high temperature standing performance and a large initial discharge capacity.

REFERENCES:
patent: 4528254 (1985-07-01), Wolf et al.
patent: 6033809 (2000-03-01), Hamamoto et al.
patent: 2004/0091786 (2004-05-01), Unoki et al.
patent: 2002-15768 (2002-01-01), None

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