| 摘要 |
The present disclosure provides an overcharging preventive electrolyte and a lithium-ion battery. The overcharging preventive electrolyte can improve the safety performance of a lithium-ion battery without affecting the cycle performance thereof. The overcharging preventive electrolyte comprises a lithium salt, a non-aqueous organic solvent, and a combined additive including an additive A and an additive B. The additive A is at least one selected from Formula 1, Formula 2, and Formula 3; the additive B is at least one selected from Formula 4, Formula 5, and Formula 6.; |
| 主权项 |
1. An overcharging preventive electrolyte, comprising:
a lithium salt; a non-aqueous organic solvent; and a combined additive, the combined additive comprising an additive A and an additive B, wherein the additive A is at least one selected from Formula 1, Formula 2, and Formula 3, wherein each of R1 to R6 is one independently selected from the group consisting of fluorine, chlorine, bromine, nitro groups, cyano groups, alkyl groups, alkoxyl groups, halogenated alkyl groups, isocyanate groups, trifluoromethylsulfonyl groups, trifluoroacetyl groups, carboxyl groups, lithium carboxylates, sodium carboxylates, phosphate groups, lithium phosphates, sodium phosphates, sulfonic groups, lithium sulfonates or sodium sulfonates, n being a natural number in the range of 1 to 5, wherein the additive B is at least one selected from Formula 4, Formula 5, and Formula 6, wherein each of R7 to R14 is one independently selected from the group consisting of linear alkyl groups with 1 to 10 carbon atoms, side chain-containing alkyl groups, double bond-containing hydrocarbon groups, triple bond-containing hydrocarbon groups, ether bond-containing alkyl groups, or carbonyl-containing alkyl groups, wherein any one of R8, R9, and R10 may be absent such that CN is directly connected to a tertiary carbon in the center, wherein any one of R11, R12, R13, and R14 may be absent such that CN is directly connected to a quaternary carbon in the center. |
