Energy storage battery with non-aqueous electrolyte solution of lithium perfluoro-alkoxy (-phenoxy) sulfonylimide

Abstract

The invention provides an energy storage battery with a non-aqueous electrolyte solution of lithium perfluoro-alkoxy (-phenoxy) sulfonylimide. A negative pole material based on a lithium titanate parent structure and a positive pole material based on a lithium manganate parent structure are adopted in the lithium perfluoro-alkoxy (-phenoxy) sulfonylimide of the battery, the electrolyte solution comprises the lithium perfluoro-alkoxy (-phenoxy) sulfonylimide, other lithium salts, a carbonic ester type and / or ether type organic solvent and other functional additives, the molar concentration of the lithium perfluoro-alkoxy (-phenoxy) sulfonylimide in the electrolyte solution is 0.001-2 mol / L, the molar concentration of the other lithium salts in the electrolyte solution is 0-2 mol / L, and the molar concentration of the other functional additives in the electrolyte solution is 0-0.5 mol / L. The lithium perfluoro-alkoxy (-phenoxy) sulfonylimide in the battery can greatly improve the high / low-temperature performance and the film forming performance of the electrolyte solution, after the lithium perfluoro-alkoxy (-phenoxy) sulfonylimide is applied to the lithium titanate / manganese lithium energy storage battery, the percentage by volume of the battery is improved under high-temperature and low-temperature situations, and the lithium perfluoro-alkoxy (-phenoxy) sulfonylimide is further conductive to circulating a lithium cell and prolonging storage life.

Description

technical field [0001] The invention relates to an energy storage battery of a non-aqueous electrolyte solution containing fluorine-sulfonimide lithium, which belongs to the technical field of chemical materials. Background technique [0002] With the rapid development of new energy sources such as wind power and photovoltaic power generation, various energy storage technologies have obvious differences in terms of energy and power density. , cycle life, operating temperature range, stability, industrial maturity, and environmental protection have advantages in many aspects, and stand out from various energy storage technologies, becoming one of the advanced energy storage technologies that are focused on the development of various energy storage applications. [0003] Lithium hexafluorophosphate (LiPF6) is generally selected as the conductive salt for non-aqueous electrolyte solutions currently used in commercial lithium-ion batteries, and the solvents are mostly high-visco...

AI Technical Summary

Problems solved by technology

In the Li4Ti5O12 / LiMn2O4 system, with the electrochemical cycle of the battery and the prolongation of the storage time of the battery, a large amount of gas will be generated inside the battery, causing the battery to bulge, seriously affecting the service life and safety performance of the battery

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