Lithium ion battery fast charging electrolyte, preparation method and lithium ion battery

The invention relates to the field of batteries, in particular to a lithium ion battery fast charging electrolyte, a preparation method and a lithium ion battery. The charging electrolyte comprises an organic solvent, a lithium salt, a first additive and a second additive, the first additive is fluorocarboxylic ester, and the second additive is fluoroethylene carbonate, difluoroethylene carbonate, 1, 2, 4-trimethyl-1, 3-pentanediol, 1, 2, 4-trimethyl-1, 3-pentanediol and 1, 2, 4-trimethyl-1, 3-pentanediol. The electrolyte is at least one of 1, 3-propane sultone, vinylene carbonate, lithium difluorophosphate, methyl fluorosulfonyl difluoroacetate, ethylene sulfate, ethylene sulfite, adiponitrile, butanedinitrile and lithium difluorophosphate. The additive provided by the invention is used for the fast-charging electrolyte of the lithium ion battery, and can effectively improve the dynamic migration process of lithium ions in the electrolyte. 本发明涉及电池领域，更具体地，涉及一种锂离子电池快充电解液、制备方法及锂离子电池。所述充电解液包括有机溶剂、锂盐、第一添加剂和第二添加剂，