Lithium secondary battery and electrolyte thereof

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method

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429338, H01M 1040

Patent

active

060338091

ABSTRACT:
A non-aqueous electrolyte lithium secondary battery comprising a cathode, an anode and a non-aqueous electrolyte comprising an electrolyte dissolved in a non-aqueous solvent, wherein the cathode is composed of a material containing a lithium complex oxide, the anode is composed of a material containing graphite and the non-aqueous solvent contains, as main components, a cyclic carbonate and a linear carbonate and 0.1 to 4% by weight, based upon the total weight of the non-aqueous solvent, of a sultone derivative having the general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms or a hydrogen atom and n is an integer of 0 to 2.

REFERENCES:
patent: 4472489 (1984-09-01), Maxfield et al.
patent: 4528254 (1985-07-01), Wolf et al.
patent: 5196278 (1993-03-01), Idota
patent: 5260148 (1993-11-01), Idota
patent: 5462820 (1995-10-01), Tanaka
patent: 5677083 (1997-10-01), Tomiyama

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