公开(公告)号：US20240079579A1

公开(公告)日：2024-03-07

申请号：US18508954

申请日：2023-11-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenguo ZHANG ,  Xingkai HU ,  Xiang YIN ,  Jingpeng FAN ,  Sihui WANG ,  Zhijie YAO ,  Na LIU

IPC: H01M4/505 ,  C01G45/12

CPC classification number: H01M4/505 ,  C01G45/1242 ,  H01M2004/028

Abstract: A positive active material, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive active material includes a spinel-type lithium-manganese-containing composite oxide with a molecular formula of Li1+xAaMbXcMn2−a−b−c−xO4−t. In the molecular formula: A is a doping element for a manganese site of the spinel-type lithium-manganese-containing composite oxide; M is used for combining with O to form a second phase containing a polyoxyanion, and M includes one or more of B, C, N, Si, P, S, or Cl; X includes one or more of Mg, Al, Si, Ca, Sc, Ti, Cr, Fe, Co, Ni, Cu, Zn, or Zr; and the molecular formula satisfies: −0.1≤x≤0.3, 0