Electrolyte and lithium ion battery

Abstract

The invention provides an electrolyte and a lithium ion battery. The electrolyte comprises a lithium salt, an organic solvent and an additive, wherein the additive comprises a first additive with oxidation potential being 4.5-5.0V and a second additive. By the electrolyte, the problem of safety caused by overcharging of the lithium ion battery can be effectively solved, and meanwhile, the DC discharging resistance of the lithium ion battery can be reduced.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an electrolyte and a lithium ion battery. Background technique [0002] In recent years, with the depletion of fossil energy and the seriousness of global environmental pollution, new energy vehicles powered by rechargeable batteries have developed rapidly. Among them, the rechargeable lithium-ion battery stands out for its high energy density, no memory effect, and high working voltage, and has become the preferred solution for the power supply of new energy vehicles. However, the development of the new energy vehicle industry has higher and higher requirements on the energy density, power performance and safety of power lithium-ion batteries, which is a great challenge to traditional lithium-ion batteries. [0003] In order to improve the cruising range of new energy vehicles, the energy density of power lithium-ion batteries must be increased. The usual practice is to use high-capaci...

AI Technical Summary

Problems solved by technology

If the heat cannot be dissipated in time, the internal temperature of the battery will continue to rise, which will easily cause thermal runaway, and even cause safety accidents such as fire or explosion, which will bring great safety hazards to new energy vehicles.

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