Lithium secondary battery and electrolyte thereof

Details Lithium secondary battery and electrolyte thereof Lithium secondary battery and electrolyte thereof

H - Electricity

01

M

H01M 10/26 (2006.01) H01M 10/24 (2006.01) H01M 10/40 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2245354

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): (see formula I) wherein R1, R2, R3, R4, R5 and R6 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.

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