Lithium ion battery electrolyte and lithium ion fast charging battery

Abstract

The invention discloses a lithium ion battery electrolyte and a lithium ion fast charging battery, the electrolyte comprises a lithium salt, an organic solvent, a first type of additive and a second type of additive, the first type of additive is a siloxane compound containing unsaturated bonds, and the second type of additive is a silicon-based sulfonate compound or a silyl ether compound. The electrolyte is applied to the high-energy-density lithium ion battery, and has the advantages of inhibiting high-temperature storage gas production and high-temperature circulation gas production, reducing low-temperature DCIR impedance, improving 3C high-rate charging and the like.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a combination additive of unsaturated bond-containing siloxane compounds and silicon-based sulfonate compounds or unsaturated bond-containing silicon A combined additive of an oxane compound and a silicon ether compound, and an electrolyte solution and a lithium-ion fast-charge battery containing the combined additive. Background technique [0002] With the rapid development of the new energy industry, the market share of electric vehicles has gradually increased, but the two major considerations of battery mileage and charging time have greatly limited consumers' desire to buy pure electric vehicles. Therefore, realizing fast charging of lithium-ion batteries has become an urgent technical problem to be solved in the commercialization of new energy vehicles. [0003] High energy density is the development trend of lithium batteries. At present, increasing the charging cut-o...

AI Technical Summary

Problems solved by technology

Although this method can effectively improve the energy density and fast charging problem, it will

Images