Additive for lithium-ion battery electrolyte, electrolyte, and lithium-ion secondary battery

Abstract

Provided are an additive for a lithium-ion battery electrolyte, an electrolyte comprising same, and a lithium-ion secondary battery. In particular, provided is an additive used for a lithium-ion battery electrolyte. The additive comprises a first additive having the structure of formula (1), each individual Ar being an aromatic group substituted with the following substituent groups: a trifluoromethyl group, a trifluoromethyl alkyl group, a methoxy group, a trifluoromethoxy group, or a trifluoromethyl alkoxy group, at least one of the substituent groups being a trifluoromethyl group, a trifluoromethyl alkyl group, a trifluoromethoxy group, or a trifluoromethyl alkoxy group; and optionally, a second additive having the structure of formula (2), R representing a divalent saturated or unsaturated hydrocarbon group. Also disclosed are an electrolyte for a lithium-ion battery containing the additive, and a lithium-ion battery containing the electrolyte.

Dependencies are inferred from the claim text.