申请人:Contemporary Amperex Technology Co., Limited
公开号:US20210135286A1
公开(公告)日:2021-05-06
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 Li
x1
Co
y1
M
1-y1
O
2-z1
Q
z1
, 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 that is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.
该应用提供了一种锂离子电池和装置。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,Q从F、Cl和S中选择。电解质含有一种添加剂A,该添加剂是一种具有相对较低氧化电位的多腈六元氮杂环化合物。该锂离子电池在高温和高电压条件下具有出色的循环性能和储存性能。