公开(公告)号：US20240055579A1

公开(公告)日：2024-02-15

申请号：US18490759

申请日：2023-10-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chongheng Shen ,  Shuxing Huan ,  Dongsheng Luo ,  Bangrun Wang ,  Qi Wu ,  Qiang Chen ,  Na Liu

IPC: H01M4/134 ,  H01M10/0525

CPC classification number: H01M4/134 ,  H01M10/0525 ,  H01M2004/028

Abstract: Provided are a lithium-ion battery positive electrode plate, comprising a positive electrode film layer disposed on at least one surface of the positive electrode current collector, wherein the positive electrode film layer comprises a positive electrode active material mixture composed of the following materials: polycrystalline particles of a first positive electrode active material with a particle size of 11.0-20.0 μm; polycrystalline particles of a second positive electrode active material with a particle size of 6.0-10.5 μm; and monocrystalline particles of a third positive electrode active material with a particle size of 1.1-5.2 μm; wherein the number of the polycrystalline particles of the first positive electrode active material is a, the number of the polycrystalline particles of the second positive electrode active material is b, the number of the monocrystalline particles of the third positive electrode active material is c, and (a+b):c is in the range of 5.7:4.3 to 7.7:2.3.

公开(公告)号：US11881582B2

公开(公告)日：2024-01-23

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 ,  H01M4/04 ,  H01M4/58 ,  H01M4/587 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0471 ,  H01M4/587 ,  H01M4/5825 ,  H01M2004/021 ,  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：US20230322579A1

公开(公告)日：2023-10-12

申请号：US18326025

申请日：2023-05-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qiang Chen ,  Qi Wu ,  Jingpeng Fan ,  Tao Huang ,  Na Liu

IPC: C01G53/00 ,  H01M10/0525 ,  C01G51/00 ,  H01M50/204

CPC classification number: C01G53/006 ,  C01G51/006 ,  H01M10/0525 ,  H01M50/204 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: A positive electrode material, including a core and a shell layer are provided. In some embodiments, a molecular formula of the core is Li1+aNixCoyMn1-x-yM1zO2, 0.8≤x

公开(公告)号：US11760657B2

公开(公告)日：2023-09-19

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: H01M10/00 ,  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：US11177475B2

公开(公告)日：2021-11-16

申请号：US16392113

申请日：2019-04-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qi Wu ,  Jinhua He ,  Changyin Ji ,  Tao Qiao ,  Kelun Wang

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

Abstract: The present disclosure relates to a ternary positive electrode material and a battery using the ternary positive electrode material. The ternary positive electrode material includes secondary particles composed of primary particles. The secondary particles have an average particle diameter D50 of 6 μm-20 μm, BET of 0.2 m2/g-1 m2/g, and the number σ of primary particles per unit area of the secondary particles is 5 particles/μm2-100 particles/μm2. The ternary positive electrode material has a formula of Li1+a[NixCoyMnzM1bM2c]O2−dNd, where element M1 and element M2 are each independently selected from at least one of Al, Zr, Ti, Mg, Zn, B, Ca, Ce, Te and Fe, element N is selected from at least one of F, Cl and S, and 0

公开(公告)号：US20240387819A1

公开(公告)日：2024-11-21

申请号：US18786584

申请日：2024-07-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qiang Chen ,  Qi Wu ,  Huan Ni ,  Chongheng Shen ,  Shuxing Huan ,  Dong Zhao ,  Jingpeng Fan ,  Jing Wang ,  Na Liu

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505

Abstract: The present application provides a positive electrode active material and a preparation method thereof. The positive electrode active material of the present application has high compaction density, improved structural stability, high filling degree among particles, good dispersibility, and good material processing performance, which can effectively improve the energy density of a battery, and improve the cycling performance and safety performance of the battery. The present application further provides a secondary battery, a battery module, a battery pack, and an electrical device including the positive electrode active material.

公开(公告)号：US20240199441A1

公开(公告)日：2024-06-20

申请号：US18412601

申请日：2024-01-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Dong Zhao ,  Qi Wu ,  Chongheng Shen ,  Bangrun Wang ,  Qiang Chen ,  Jingpeng Fan ,  Na Liu

IPC: C01G53/00 ,  H01M4/02 ,  H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/00

CPC classification number: C01G53/50 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/00 ,  C01P2002/08 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/12 ,  H01M2004/021 ,  H01M2004/028

Abstract: This application relates to a positive active material, a method for preparing same, an electrode plate, a secondary battery, and an electrical device. The positive active material includes: a core material, including a lithium-rich manganese-based positive electrode material; and a cladding layer, covering an outer surface of the core material, where the cladding layer includes an oxygen-ion conductor and a lithium-ion conductor.