▎ 摘　　要

NOVELTY - Lithium ion battery comprises a positive electrode, a negative electrode and an electrolyte. The positive electrode includes a positive active material and a conductive agent. The anode active material is a manganese-containing anode material. The electrolyte includes dioxolanone compound (I). USE - Lithium ion battery. ADVANTAGE - The lithium ion battery has good high temperature storage performance and high temperature circulation performance. The stability of the positive electrode material can be reinforced on the basis of ensuring the lifting conductive performance and it can obviously improve the compatibility problem of the anode material and the electrolyte. By adding the compound represented by the structural formula 1, under the condition of controlling the ratio of the grain diameter ratio and the specific surface area between the conductive agent and the positive active material, at the same time, controlling the adding amount of the compound, which can maximize the optimization of the performance of the battery. DETAILED DESCRIPTION - Lithium ion battery comprises a positive electrode, a negative electrode and an electrolyte. The positive electrode includes a positive active material and a conductive agent. The anode active material is a manganese-containing anode material. The electrolyte includes dioxolanone compound of formula (I). The product of the ratio of the average particle diameter of the positive electrode active material to the average particle diameter of the conductive agent and the ratio of the specific surface area of the positive active material to the specific surface area of the conductive agent, divided by the mass percentage of the compound (I) relative to the electrolyte is 0.5-16. R1, R2, R3, R4, R5, R6=H, F or 1-5C group.