LITHIUM SECONDARY BATTERY

摘要

The present disclosure relates to a lithium secondary battery. More specifically, the lithium secondary battery of the present disclosure includes a cathode, an anode, a separator interposed between the cathode and the anode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution includes an ionizable lithium salt and an organic solution, and includes, based on 100 parts by weight of the non-aqueous electrolyte solution, (a) 1 part by weight to 10 parts by weight of a compound containing a vinylene group or vinyl group, and (b) 0.1 parts by weight to 10 parts by weight of a dinitrile-based ether compound of a particular structure, and the cathode includes a cathode active material including a mixture of a first cathode active material Li x CoO 2 (0.5