NON-AQUEOUS ELECTROLYTE AND LITHIUM SECONDARY BATTERY USING THE SAME

摘要

The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery, comprising a sulfolane-based additive; and a lithium secondary battery using the same. The non-aqueous electrolyte solution for a lithium secondary battery according to the present invention comprises an ionizable lithium salt; an organic solvent; and a sulfolane compound of formula (I), the sulfolane compound being present in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total weight of the lithium salt and the organic solvent. The non-aqueous electrolyte solution for a lithium secondary battery according to the present invention can exhibit superior storage characteristic and life cycle at a high temperature, with maintaining good output characteristic at a low temperature.

主权项

1. A non-aqueous electrolyte solution for a lithium secondary battery, comprising an ionizable lithium salt; an organic solvent; and a sulfolane compound of the following formula (I), wherein the sulfolane compound is present in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total weight of the lithium salt and the organic solvent: wherein, R1, R2, R3, R4, R5, R6, R7 and R8 are each independently hydrogen, halogen, vinyl, allyl, phenyl, C1-C10 alkyl or C1-C10 alkoxy.