申请人:Contemporary Amperex Technology Co., Limited
公开号:US10938068B2
公开(公告)日:2021-03-02
This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 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 electrolyte contains an additive A, an additive B, and an additive C. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The additive B is an anhydride compound. The additive C is a halogen substituted cyclic carbonate compound.
该应用程序提供了一种锂离子电池和一个装置。该锂离子电池包括电极组件和电解质。电极组件包括正极板、负极板和隔膜。正极板的正极活性材料包括Lix1Coy1M1-y1O2-z1Qz1,其中0.5≤x1≤1.2,0.8≤y1<1.0,0≤z1≤0.1,M从Al、Ti、Zr、Y和Mg中选择一个或多个,Q从F、Cl和S中选择一个或多个。电解质包含添加剂A、添加剂B和添加剂C。添加剂A是一种具有相对较低氧化电位的聚腈六元杂环化合物。添加剂B是一种酐化合物。添加剂C是一种卤代环碳酸酯化合物。