Flame-retardant coating and lithium ion battery employing same

Abstract

The invention provides a flame-retardant coating, and belongs to the technical field of lithium ion batteries. The flame-retardant coating is prepared from the following raw materials in percentage by mass: 15 to 50 percent of a flame-retardant additive, 45 to 80 percent of a solvent and 0.5 to 12 percent of an adhesive. The invention also provides a lithium ion battery employing the flame-retardant coating and a preparation method for the lithium ion battery. The flame-retardant coating has flame-retardant, heat insulation and insulation functions, large-scale thermal runaway of the lithium ion battery can be effectively prevented and inhibited in both chemical and physical manners, and safety of the lithium ion battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a flame retardant coating and a lithium ion battery using the flame retardant coating. Background technique [0002] Due to the advantages of high energy density, high working voltage, wide applicable temperature range, long cycle life, and no memory effect, lithium-ion batteries have been widely used in military, medical, electric work, 3C, energy storage, and electric vehicles. Wide range of applications. However, with the occurrence of safety accidents such as fire and explosion in the application of lithium-ion batteries in these fields, the problem of thermal runaway of lithium-ion batteries under extreme use conditions has become increasingly prominent, and has become an important problem in this field that needs to be solved urgently. [0003] Adding safety coatings or organic flame retardant additives to lithium-ion batteries is one of the methods to improv...

AI Technical Summary

Problems solved by technology

However, in the actual thermal runaway reaction process, due to the low organic reaction rate, before the flame retardant additive reacts to form a substance with a flame retardant effect, the thermal runaway reaction has spread on a large scale and entered an uncontrollable state

In summary, organic flame retardant additives used in electrolytes have poor flame retardant effects and narrow application ranges, making it difficult to promote them on a large scale.