Non Aqueous Electrolyte And Lithium Secondary Battery Comprising Same

Abstract: The present invention provides a non-aqueous electrolyte comprising: a lithium salt; an organic solvent; a compound represented by chemical formula 1 as a first additive; and a compound represented by chemical formula 2 as a second additive. In chemical formula 1, A is a C2-3 cyclic phosphate group, R is a C1-5 alkylene group or a C2-5 alkenylene group, and X is a C1-5 perfluoroalkyl group. In chemical formula 2, R1 to R6 are each independently any one selected from the group consisting of H, F, a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C2-10 alkylcarbonyl group, a substituted or unsubstituted C1-10 alkylester group, CN, SO3 and SO3CF3.

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