NON-AQUEOUS ORGANIC ELECTROLYTE ADDITIVE, METHOD FOR PREPARING NON-AQUEOUS ORGANIC ELECTROLYTE ADDITIVE, NON-AQUEOUS ORGANIC ELECTROLYTE, AND LITHIUM-ION SECONDARY BATTERY

摘要

A non-aqueous organic electrolyte additive is formulated by Formula (I), where R is halogen or R is one of: a C₁-C₁₀ alkyl group, a C₁-C₁₀ alkene group, a C₁-C₁₀ alkyne group, a C₁-C₁₀ alkoxy group, a halogen-containing C₁-C₁₀ alkyl group, a halogen-containing C₁-C₁₀ alkene group, a halogen-containing C₁-C₁₀ alkyne group and a halogen-containing C₁-C₁₀ alkoxy group. The non-aqueous organic electrolyte additive is oxidized and decomposed before an organic solvent in a high-voltage lithium-ion secondary battery, thereby forming a protection film that facilitates conduction of Li⁺ on a surface of an anode active material, increasing cyclic performance of a lithium-ion secondary battery at a high voltage, and achieving good stability. Embodiments of the present application further provide a method for preparing a non-aqueous organic electrolyte additive, a non-aqueous organic electrolyte containing the non-aqueous organic electrolyte additive, and a lithium-ion secondary battery having a high energy density.