申请人:Contemporary Amperex Technology Co., Limited
公开号:EP3796449A1
公开(公告)日:2021-03-24
The present application provides a lithium-ion battery (5) and an apparatus, and the lithium-ion battery (5) includes an electrode assembly and an electrolytic solution, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separation film. A positive active material of the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1, 0.5≤ x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolytic solution contains vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, and an additive A. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery (5) has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.
本申请提供了一种锂离子电池(5)及装置,锂离子电池(5)包括电极组件和电解液,电极组件包括正极片、负极片和分离膜。正极片的正极活性材料包括Lix1Coy1M1-y1O2-z1Qz1,0.5≤x1≤1.2,0.8≤y1≤1.0,0≤z1≤0.1,M选自Al、Ti、Zr、Y和Mg中的一种或多种,Q选自F、Cl和S中的一种或多种。添加剂 A 是一种氧化电位相对较低的多腈六元氮杂环化合物。锂离子电池(5)具有极佳的循环性能和存储性能,尤其是在高温高压条件下。