申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP4009398A1
公开(公告)日:2022-06-08
Provided is a non-aqueous secondary battery that includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The positive electrode includes LiNixCoyMnzO2 (0.7 < x < 0.9, 0 < y < 0.2, 0 < z < 0.2) as a lithium-containing metal oxide, and when the positive electrode before and after cycle testing of the non-aqueous secondary battery is analyzed by powder X-ray diffraction using Cu-Kα radiation, the rate of change of the c-axis lattice constant is 1.0% or less. The non-aqueous electrolyte includes 5-20% by volume of acetonitrile and has an ion conductivity of at least 10 mS/cm and less than 15 mS/cm at 20°C.
本文提供了一种非水二次电池,它包括正极、负极、隔膜和非水电解液。正极包括作为含锂金属氧化物的 LiNixCoyMnzO2 (0.7 < x < 0.9, 0 < y < 0.2, 0 < z < 0.2),当使用 Cu-Kα 辐射对非水性二次电池循环测试前后的正极进行粉末 X 射线衍射分析时,c 轴晶格常数的变化率为 1.0% 或更小。非水电解液包括 5-20%(体积)的乙腈,在 20°C 时离子电导率至少为 10 mS/cm,小于 15 mS/cm。