公开(公告)号：US20240194870A1

公开(公告)日：2024-06-13

申请号：US18583887

申请日：2024-02-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chongheng Shen ,  Qi Wu ,  Shuxing Huan ,  Dongsheng Luo ,  Na Liu

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/505

Abstract: Provided are a high-nickel ternary positive electrode material, including a matrix Li1+xNiaCobMgcYdM(1−a−b−c−d)O2±y, wherein M is selected from at least one of Mn, Zr, Al, B, Ta, Mo, W, Nb, Sb, and La, wherein: 0.8≤a

公开(公告)号：US20230299276A1

公开(公告)日：2023-09-21

申请号：US18323423

申请日：2023-05-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Dong Zhao ,  Qi Wu ,  Qiang Chen ,  Jingpeng Fan ,  Jing Wang ,  Na Liu

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/587 ,  H01M4/04

CPC classification number: H01M4/366 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/0471 ,  H01M2004/028

Abstract: A positive electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode active material in the present invention includes: a core, where the core is a lithium-containing phosphate; a first coating layer disposed on at least part of surface of the core, where the first coating layer is a carbon coating layer co-doped with titanium and nitrogen; and a second coating layer disposed on at least part of surface of the first coating layer, where the second coating layer includes Li1+xMxTi2−x(PO4)3, where M is at least one element selected from aluminum, lanthanum, indium, zirconium, gallium, and scandium, and 0.2≤x≤0.8. With use of the positive electrode active material of the present invention, a high discharge capacity, excellent rate performance, and excellent cycling performance can be achieved.

公开(公告)号：US11417883B2

公开(公告)日：2022-08-16

申请号：US17565450

申请日：2021-12-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/02

Abstract: The present application discloses positive electrode active material, preparation method thereof, positive electrode plate, lithium-ion secondary battery and battery module, pack, and apparatus. The positive electrode active material includes a nickel-containing lithium composite oxide satisfying a chemical formula Li1+a[NixCoyMnzMb]O2, in the formula, M is a doping element at transition metal site, 0.5≤x

公开(公告)号：US20240356021A1

公开(公告)日：2024-10-24

申请号：US18751234

申请日：2024-06-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: This application discloses a positive electrode active material, including secondary particles and a coating layer applied on an exterior surface of each of the secondary particles, where the secondary particle includes a lithium transition metal oxide that contains a doping element M1, the coating layer includes an oxide of element M2, M1 is selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and M2 is selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element M1 in the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle.

公开(公告)号：US12057576B2

公开(公告)日：2024-08-06

申请号：US17682057

申请日：2022-02-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: This application discloses a positive electrode active material, including secondary particles and a coating layer applied on an exterior surface of each of the secondary particles, where the secondary particle includes a lithium transition metal oxide that contains a doping element M1, the coating layer includes an oxide of element M2, M1 is selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and M2 is selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element M1 in the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle.

公开(公告)号：US11613474B2

公开(公告)日：2023-03-28

申请号：US17683389

申请日：2022-03-01

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M10/00 ,  C01G53/00 ,  H01M10/0525

Abstract: The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

公开(公告)号：US20220123302A1

公开(公告)日：2022-04-21

申请号：US17565450

申请日：2021-12-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi DOU ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/131 ,  H01M10/0525

Abstract: The present application discloses positive electrode active material, preparation method thereof, positive electrode plate, lithium-ion secondary battery and battery module, pack, and apparatus. The positive electrode active material includes a nickel-containing lithium composite oxide satisfying a chemical formula Li1+a[NixCoyMnzMb]O2, in the formula, M is a doping element at transition metal site, 0.5≤x

公开(公告)号：US20240262712A1

公开(公告)日：2024-08-08

申请号：US18639987

申请日：2024-04-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jingpeng Fan ,  Zhenguo Zhang ,  Na Liu ,  Qi Wu ,  Qiang Chen ,  Dong Zhao ,  Jing Wang

IPC: C01G53/00

CPC classification number: C01G53/54 ,  C01P2002/32 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40

Abstract: Provided is a spinel lithium nickel manganese oxide material, in which an XRD pattern of the spinel lithium nickel manganese oxide material satisfies: 0

公开(公告)号：US20230202864A1

公开(公告)日：2023-06-29

申请号：US18109866

申请日：2023-02-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: C01G53/00 ,  H01M10/0525

CPC classification number: C01G53/44 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

公开(公告)号：US11527752B2

公开(公告)日：2022-12-13

申请号：US17131012

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qi Wu ,  Jinhua He ,  Changyin Ji

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/36 ,  C01G53/00 ,  H01M4/02

Abstract: This application provides a positive active material and a preparation method thereof, an electrochemical battery, a battery module, a battery pack, and an apparatus. The positive active material includes an inner core and a coating layer, where the coating layer coats a surface of the inner core. The inner core is selected from a ternary material with a molecular formula of Li1+a[NixCoyMnzMbM′c]O2−dYd, where distribution of each of the doping elements M, M′, and Y in the inner core meets the following condition: there is a reduced mass concentration gradient from an outer side of the inner core to a center of the inner core. The positive active material herein features high gram capacity, high structural stability, and high thermal stability, so that the electrochemical battery has excellent cycle performance and storage performance and high initial discharge gram capacity.