NON-AQUEOUS ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY HAVING THE SAME

摘要

The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, comprising an amide compound having a specific structure; an ionizable lithium salt; a cyclic sulfate; and an organic solvent, and a lithium secondary battery comprising the non-aqueous electrolyte solution.;The non-aqueous electrolyte solution of the present disclosure has good thermal and chemical stability and can be effectively used as the electrolyte of a lithium secondary battery to provide good charge/discharge performances and stability at a high temperature.

主权项

1. A non-aqueous electrolyte solution for a lithium secondary battery, comprising:
an amide compound of formula (I); an ionizable lithium salt; a cyclic sulfate; and an organic solvent: wherein R, R1 and R2 are each independently any one selected from the group consisting of hydrogen, halogen, C1-20 alkyl, alkylamine, alkoxy, alkoxyalkyl, alkenyl and aryl groups, and at least one of R1 and R2 is represented by CH3—(CH2)p-O—(CH2)q- where p is an integer of 0 to 8 and q is an integer of 1 to 8, and X is any one selected from the group consisting of carbon, silicon, oxygen, nitrogen, phosphorus, sulfur and hydrogen, in which i) m is 0 when X is hydrogen, ii) m is 1 when X is oxygen or sulfur, iii) m is 2 when X is nitrogen or phosphorus, and iv) m is 3 when X is carbon or silicon.