Lithium ion battery electrolyte and lithium ion fast charging battery

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. 本发明公开了一种锂离子电池电解液及锂离子快充电池，所述电解液包括锂盐、有机溶剂、第一类添加剂和第二类添加剂，所述第一类添加剂为含不饱和键的硅氧烷类化合物，第二类添加剂为硅基磺酸酯类化合物或硅醚类化合物。本发明的电解液应用于高能量密度锂离子电池，具有抑制高温存储产气、高温循环产气、降低低温DCIR阻抗、提升3C大倍率充电等优点。