Non-aqueous Electrolyte Solution Additive, and Non-aqueous Electrolyte Solution for Lithium Secondary Battery and Lithium Secondary Battery which Include the Same

The present invention relates to a non-aqueous electrolyte solution additive, and a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery which include the same, and particularly, to a non-aqueous electrolyte solution additive including a compound based on a cyclic sulfur structure, and a secondary battery in which low-voltage failure due to metal dissolution may be improved by including the same.