Electrolytic solution additive for lithium secondary battery, non-aqueous electrolytic solution containing the electrolytic solution additive, and lithium secondary battery

摘要

The present invention provides a non-aqueous electrolyte containing an additive which is an isocyanate compound containing a non-aqueous organic solvent, a lithium salt, and a carbon-carbon triple bond, and containing the isocyanate compound containing the carbon-carbon triple bond. . When the non-aqueous electrolyte contains the isocyanate compound additive containing the carbon-carbon triple bond of the present invention, the life characteristics and high temperature durability can be improved, and the internal resistance of the battery can be reduced.