Additive, non-aqueous electrolyte and lithium ion battery

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a non-aqueous electrolyte and a lithium ion battery. The invention provides an additive, the additive is a phosphate compound containing thienyl, and the phosphate compound containing thienyl has a structure shown as a formula I; the invention also discloses a non-aqueous electrolyte and a lithium ion battery; and according to the additive and the non-aqueous electrolyte provided by the invention, the technical defects that the lithium ion battery is easy to break out a fire and explode under the conditions, such as high temperature, overcharging, acupuncture penetration and extrusion, of the lithium ion battery can be solved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to nonaqueous electrolytic solutions and lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in portable electronic product markets such as mobile phones, digital cameras, and personal computers due to their high energy density, high voltage, long life, no memory effect, and no pollution. However, in recent years, incidents of lithium-ion battery explosions and injuries are common, which has aroused widespread concern about the safety of lithium-ion batteries. [0003] At present, most commercial lithium-ion batteries use organic solvents as electrolytes, which have high vapor pressure and low flash point. Under some abuse conditions, such as high temperature, overcharge, needle penetration and extrusion, etc. It is easy to cause safety problems such as fire and explosion. [0004] The safety issues caused by organic electrolyte...

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Problems solved by technology

[0005] Therefore, judging from the current research progress, although lithium-ion batteries have the advantages of high energy density, high voltage, long life, no memory effect, no pollution, good flame retardancy and high safety, the main problem is that Lithium-ion batteries are prone to fire, explosion and other safety issues under abuse conditions, such as high temperature, overcharge, needle penetration and extrusion. Stable additives and non-aqueous electrolytes under overcharge, needle penetration, and extrusion

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