NONAQUEOUS ELECTROLYTE FOR LI-SECONDARY BATTERY AND LI SECONDARY BATTERY THEREBY

摘要

A non-aqueous electrolyte is provided to improve life characteristic and storage characteristic of a battery while maintaining performances of a battery when high voltage is applied to a battery. A non-aqueous electrolyte for a lithium secondary battery includes: a base electrolyte comprising a non-aqueous organic solvent and a lithium salt dissolved in the non-aqueous organic solvent, wherein the non-aqueous organic solvent contains at least one solvent selected from the group comprising carbonate-based solvents, ester-based solvents, ether-based solvents, and ketone-based solvents; and fluorotriphenylsilane represented by the following formula 1 to be added to the base electrolyte.