NONAQUEOUS ELECTROLYTE FOR IMPROVING HIGH-TEMPERATURE ELECTROCHEMISTRY PERFORMANCE OF LITHIUM ION BATTERY AND USE THEREOF

摘要

A nonaqueous electrolyte for improving the high-temperature performance of a lithium ion battery and a lithium ion battery which uses the nonaqueous electrolyte are provided. The nonaqueous electrolyte consists of a conductive lithium salt and an organic solvent, wherein the conductive lithium salt is an asymmetric fluoro-sulfonylimide lithium salt or the mixture of the asymmetric fluoro-sulfonylimide lithium salt and other conductive lithium salts. The electrolyte is non-corrosive to the aluminum foil, has high heat endurance and conductivity, and can significantly improve the electrochemistry performance of the lithium ion battery at high temperature.