LITHIUM SECONDARY BATTERY

The present invention relates to a lithium secondary battery including a positive electrode including a lithium-nickel-cobalt-manganese-based oxide as a positive electrode active material, a negative electrode including a carbon-based negative electrode active material, a separator interposed between the negative electrode and the positive electrode; and a non-aqueous electrolyte solution containing a lithium salt, an organic solvent, and an additive, wherein the organic solvent includes fluoroethylene carbonate of 10 wt% or greater and ethylene carbonate of 20 wt% or less, the additive includes propene sultone and lithium fluoromalonato (difluoro) borate, and the driving voltage of the lithium secondary battery is 4.35 V or greater.