A non-aqueous electrolyte for a lithium-ion battery and a lithium-ion battery. The non-aqueous electrolyte comprises unsaturated phosphate compounds and unsaturated cyclic carboxylic acid anhydride compounds. The unsaturated phosphate compounds have the structure illustrated in structural formula 4; structural formula 4: R13, R11, and R12 are independently selected from hydrocarbon groups having 1-5 carbon atoms respectively, and at least one of R13, R11, and R12 is an unsaturated hydrocarbon group containing double bonds or triple bonds; the unsaturated cyclic carboxylic acid anhydride compounds have the structure illustrated in structural formula 5; structural formula 5: R14 is independently selected from vinylidene having 2-4 carbon atoms or fluoro-substituted vinylidene. By means of the synergistic effect of two compounds, the non-aqueous electrolyte has excellent high-temperature cycling performance and storage performance, and also has lower impedance and good low-temperature performance.
一种用于
锂离子电池的非
水电解质和一种
锂离子电池。该非
水电解质包括不饱和
磷酸盐化合物和不饱和环
羧酸酐化合物。不饱和
磷酸盐化合物具有结构式4所示的结构;结构式4:R13、R11和R12分别独立地选自具有1-5个碳原子的烃基,且R13、R11和R12中至少有一个是含有双键或三键的不饱和烃基;不饱和环状
羧酸酐化合物具有结构式5所示的结构;结构式5:R14独立地选自具有2-4个碳原子的亚
乙烯基或
氟取代亚
乙烯基。通过两种化合物的协同作用,非
水电解质具有优异的高温循环性能和储存性能,同时还具有较低的阻抗和良好的低温性能。