ELECTROLYTE AND LITHIUM-ION BATTERY COMPRISING SAID ELECTROLYTE

摘要

The present disclosure relates to an electrolyte and a lithium-ion battery comprising said electrolyte. The electrolyte includes an organic solvent, a lithium salt, vinylene carbonate, fluoroethylene carbonate, and a combined additive. The combined additive includes: propane sultone at 0.1% to 7% of the total weight of the electrolyte, ethylene sulfate at 0.1% to 7% of the total weight of the electrolyte, and adipic dinitrile at 0.1% to 9% of the total weight of the electrolyte. The use of the electrolyte according to the present disclosure in a lithium-ion battery can greatly improve the initial efficiency, cycle performance, high-temperature storage performance, overcharging endurance performance and safety performance of the lithium-ion battery at a high voltage above 4.4 V.

主权项

1. An electrolyte, comprising:
an organic solvent; a lithium salt; vinylene carbonate; fluoroethylene carbonate; and a combined additive, wherein said combined additive comprises:
propane sultone at 0.1% to 7% of a total weight of the electrolyte;ethylene sulfate at 0.1% to 7% of the total weight of the electrolyte; andadipic dinitrile at 0.1% to 9% of the total weight of the electrolyte.