Lithium-ion battery and apparatus

A lithium-ion battery comprising an electrode assembly and an electrolytic solution, wherein the electrode assembly comprises a positive electrode sheet, a negative electrode sheet, and a separation film;

• wherein
• a positive active material in the positive electrode sheet comprises Lix1Coy1M1-y1O2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is one or more selected from the group consisting of Al, Ti, Zr, Y, and Mg, and Q is one or more selected from the group consisting of F, Cl, and S;
• the electrolytic solution contains vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, and an additive A, wherein based on total mass of the electrolytic solution, a mass percentage of the additive A is 0.1%-10% and a mass percentage of each of the vinylene carbonate, the fluoroethylene carbonate, and the 1,3-propane sultone is 0.1%-10% respectively;
• wherein, the additive A is one or more selected from the group consisting of compounds;