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

公开(公告)号：US20230420751A1

公开(公告)日：2023-12-28

申请号：US18466815

申请日：2023-09-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhenguo ZHANG ,  Chang PENG ,  Sihui WANG ,  Na LIU ,  Jingpeng FAN ,  Dong ZHAO ,  Zhijie YAO

IPC: H01M10/42 ,  H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/58 ,  H01M10/0568

CPC classification number: H01M10/4235 ,  H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/0568 ,  H01M2004/021

Abstract: A secondary battery includes a positive electrode sheet having a positive electrode active material and a non-aqueous electrolyte. The positive electrode active material includes a central core material and a modification layer disposed on a surface of the central core material. The modification layer including an orthophosphate with a molecular formula Aa+x[PO4]3−y, where A denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, Ba, Ni, Fe, Co, Ti, Al, Cr, V, Nb, and W, 1≤a≤6, and ax=3y. The non-aqueous electrolyte includes a fluorinated phosphate with a molecular formula Bb+m[PO1+cF3-c]c−n, where B denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, and Ba, 1≤b≤2, c denotes 1 or 2, and bm=cn.