Patent ID: 7306880

Claim:
An electrolyte for a lithium secondary battery, comprising a non-aqueous organic solvent including 20 to 95 vol % of an ester-based or ether-based organic solvent based on a total amount of organic solvent; one or more lithium salts; and an additive compound having at least two carbonate groups, wherein the additive compound is a carbonic acid ester compound of the following Formula (4): wherein R 1 is hydrogen, a C 1 to C 6 alkyl, or a C 6 to C 12 aryl; R 2 is (CH 2 ) n , where n is an integer of 1 to 6; R 3 is hydrogen, a C 1 to C 6 alkyl, or a C 6 to C 12 aryl; and R 4 and R 5 and each independently hydrogen or a C 1 to C 6 alkyl.