公开(公告)号：US20230119115A1

公开(公告)日：2023-04-20

申请号：US18085497

申请日：2022-12-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jinhua HE ,  Qi WU ,  Jingpeng FAN ,  Qiang CHEN ,  Yuxiang ZHAO

IPC: H01M4/62 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M10/0525

Abstract: This application provides a positive-electrode active material and a manufacturing method thereof. The positive-electrode active material includes a positive-electrode active material matrix and a coating layer, and the coating layer coats a surface of the positive-electrode active material matrix. The positive-electrode active material matrix is Li1+a[NixCoyMnzMb]O2, where 0

公开(公告)号：US20200028169A1

公开(公告)日：2020-01-23

申请号：US16424784

申请日：2019-05-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qi WU ,  Jinhua HE ,  Changyin JI ,  Liangbin LIU

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0587

Abstract: A positive active material comprising active material bulk particles and a coating layer of an oxide containing N element is disclosed, wherein the surface of the active material bulk particle is doped with M element to form a doped layer, and the content of the M element is 400 ppm to 3000 ppm, and the content of the M element gradually decreases from the outer surface of active material bulk particles towards the core direction; wherein the content of the N element in the coating layer is 100 ppm to 2000 ppm; wherein the average content of the N element per unit volume of the coating layer is greater than the average content of the M element per unit volume of the doped layer; wherein the M element and the N element are each independently selected from one or more of Mg, Ca, Ce, Ti, Zr, Al, Zn, and B.

公开(公告)号：US20230395796A1

公开(公告)日：2023-12-07

申请号：US18325996

申请日：2023-05-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qi WU ,  Qiang CHEN ,  Yuxiang ZHAO ,  Jingpeng FAN ,  Qisen HUANG

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/04 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M10/0525 ,  H01M4/366 ,  H01M4/0471 ,  H01M4/505 ,  H01M2220/20 ,  H01M2004/028

Abstract: A modified high-nickel ternary positive electrode material includes an inner core and inner and outer coating layers. The inner core includes a high-nickel ternary positive electrode material matrix, the matrix being doped with M1, M2, and W. M1 is one of Mo, Zr, Ti, Sb, Nb, and Te. M2 is one of Mg, Al, Ca, Zn, and Sr. Chemical formula of the high-nickel ternary positive electrode material matrix is Li1+a[NixCoyMnzM1bM2cWd]O2. 0.65≤x

公开(公告)号：US20220181675A1

公开(公告)日：2022-06-09

申请号：US17682258

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: H01M10/0525 ,  C01G53/00

Abstract: This application discloses a positive electrode active material, including bulk particles and a coating layer applied on an exterior surface of each of the bulk particles, where the bulk particle includes a lithium composite oxide that contains element nickel and a doping element M1, and the coating layer includes an oxide of element M2. When the positive electrode active material is in a 11% delithiated state, average valences of element M1 and M2 are α1 and β1, respectively; when the positive electrode active material is in a 78% delithiated state, average valences of element M1 and M2 are α2 and β2, respectively; and α2>α1, β1=β2. Element M1 includes one or more of Si, Ti, Cr, Mo, V, Se, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and element M2 is selected from one or more of Mg, Al, Ca, Zr, Zn, Y, and B.

公开(公告)号：US20240097124A1

公开(公告)日：2024-03-21

申请号：US18123371

申请日：2023-03-20

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qi WU ,  Jinhua HE ,  Changyin JI ,  Liangbin LIU

IPC: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0587

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021

Abstract: A positive active material comprising active material bulk particles and a coating layer of an oxide containing N element is disclosed, wherein the surface of the active material bulk particle is doped with M element to form a doped layer, and the content of the M element is 400 ppm to 3000 ppm, and the content of the M element gradually decreases from the outer surface of active material bulk particles towards the core direction; wherein the content of the N element in the coating layer is 100 ppm to 2000 ppm; wherein the average content of the N element per unit volume of the coating layer is greater than the average content of the M element per unit volume of the doped layer; wherein the M element and the N element are each independently selected from one or more of Mg, Ca, Ce, Ti, Zr, Al, Zn, and B.

公开(公告)号：US20220407059A1

公开(公告)日：2022-12-22

申请号：US17680588

申请日：2022-02-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shushi DOU ,  Chunhua HU ,  Yao JIANG ,  Qi WU ,  Jinhua HE ,  Bin DENG

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/36 ,  H01M10/0525

Abstract: This application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack, and apparatus containing such lithium-ion secondary battery. The positive electrode active material includes bulk particles and an element M1-containing oxide coating layer applied on an exterior surface of each of the bulk particles. The bulk particle includes a nickel-containing lithium composite oxide. Bulk phases of the bulk particles are uniformly doped with element M2. A surface layer of the bulk particle is an exterior doped layer doped with element M3. Element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

公开(公告)号：US20220185698A1

公开(公告)日：2022-06-16

申请号：US17683570

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: C01G53/00 ,  H01M10/0525

Abstract: A positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, a battery pack, and apparatus containing the lithium-ion secondary battery are provided. The positive electrode active material includes secondary particles formed by agglomeration of primary particles, where the primary particles include a layered nickel-containing lithium composite oxide, and the nickel-containing lithium composite oxide includes a doping element; and when the positive electrode active material is charged from an 11% delithiated state to a 78% delithiated state at a rate of 0.1C, a lattice of the primary particles has a maximum shrinkage rate satisfying Δamax≤3.00% in an a-axis direction, and a maximum swelling rate satisfying Δcmax≤3.02% in a c-axis direction.

公开(公告)号：US20220185695A1

公开(公告)日：2022-06-16

申请号：US17682374

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: C01G53/00 ,  H01M10/0525

Abstract: A positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack, and apparatus containing such lithium-ion secondary battery are provided. The positive electrode active material includes matrix particles and a coating layer covering an exterior surface of the matrix particle, where the matrix particle includes a lithium nickel cobalt manganese oxide, and the coating layer includes an oxide of element M1; the matrix particle is doped with element M2 and element M3, element M2 in the matrix particle is uniformly distributed, and element M3 in the matrix particle has a decreasing concentration from the exterior surface to a core of the matrix particle; and element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ba, Ti, Zr, Zn, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.

公开(公告)号：US20220177328A1

公开(公告)日：2022-06-09

申请号：US17683647

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: C01G53/00 ,  H01M10/0525

Abstract: A positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack, and apparatus containing such lithium-ion secondary battery are disclosed. The positive electrode active material includes a lithium nickel cobalt manganese oxide. In the lithium nickel cobalt manganese oxide, the number of moles of nickel accounts for 50% to 95% of the total number of moles of nickel, cobalt, and manganese. The lithium nickel cobalt manganese oxide has a layered crystal structure with a space group R3m. The lithium nickel cobalt manganese oxide includes a doping element. When the positive electrode active material is in a 78% delithiated state, the doping element has two or more different valence states, and the amount of doping element in a highest valence state accounts for 40% to 90% of the total amount of doping element.

公开(公告)号：US20240199439A1

公开(公告)日：2024-06-20

申请号：US18322010

申请日：2023-05-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qi WU ,  Chongheng SHEN ,  Qiang CHEN ,  Jingpeng FAN ,  Yuxiang ZHAO ,  Qisen HUANG

IPC: C01G53/00 ,  C01G53/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02 ,  H01M10/0525

CPC classification number: C01G53/006 ,  C01G53/04 ,  H01M4/505 ,  H01M4/525 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028 ,  H01M10/0525

Abstract: This application relates to a ternary precursor for making a material for positive electrodes in lithium batteries. In the ternary precursor, primary particles or whiskers of the ternary precursor are distributed in a radial direction. A deformation stacking fault probability fD of the ternary precursor is ≤2.5%. This application further relates to a preparation method of the ternary precursor, a ternary positive electrode material, a secondary battery, a battery module, a battery pack, and an electric apparatus.