METHOD AND TECHNIQUE FOR PREPARING ELECTROLYTE SOLUTION FOR HIGH-SAFETY LITHIUM ION BATTERY

摘要

An electrolyte solution for a high-safety lithium ion battery, falling within the field of lithium ion batteries. The main ingredients of the electrolyte solution comprise organic solvents, an electrolyte and additives, wherein the organic solvents comprise at least one high flash point solvent, and the additives comprise a film additive and a flame retardant additive. The molar concentration of the electrolyte in the organic solvents is 0.8-1.5 mol/L, and the weight percentages of the additives in the electrolyte solution are 2%-8% and 1%-2% respectively. With regard to the electrolyte solution for the high-safety lithium ion battery, by using a method of using a high flash point solvent in combination with a small amount of a flame retardant additive, the electrolyte solution has a good flame retardant effect, and is difficult to ignite and has a relatively short self-extinguishing time. When the electrolyte solution is used in a lithium ion battery, the safety performance of the battery can be improved.