| abstract |
The present invention provides a non-aqueous electrolyte containing an additive and a lithium secondary battery comprising same, the additive comprising a lithium salt containing lithium bis(fluorosulfonyl)imide (LiFSI), a vinylidene carbonate-based compound, and a sultone-based compound. The lithium secondary battery comprising the non-aqueous electrolyte according to the present invention is capable of improving low-temperature output characteristics, high-temperature cycle characteristics, output characteristics after high-temperature storage, and capacity characteristics. |