公开(公告)号：US20250140815A1

公开(公告)日：2025-05-01

申请号：US19006363

申请日：2024-12-31

Applicant: Ningde Amperex Technology Limited

Inventor： Ye LANG ,  Gang PENG ,  Leimin XU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525

Abstract: An electrochemical device, including a positive electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer disposed on a surface of the positive electrode current collector. The positive electrode active material layer includes a base portion and a protruding portion on a surface of the base portion away from the current collector, where a thickness of the base portion is d microns, and a height of the protruding portion is a microns. The positive electrode active material layer includes a positive electrode active material, and the positive electrode active material includes a lithium-nickel composite oxide, where a molar proportion of element nickel in the lithium-nickel composite oxide in metal elements other than lithium in the lithium-nickel composite oxide is X, satisfying: 0.2d×x≤a≤1.15d×x.

公开(公告)号：US20250029986A1

公开(公告)日：2025-01-23

申请号：US18901353

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Gang PENG ,  Ye LANG ,  Wenyuan LIU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/525 ,  H01M4/58

Abstract: A positive electrode material, including: a matrix and a first coating layer located on surface of the matrix, where based a molar content of metal elements other than Li in the first coating layer, a molar percentage of element Co in the first coating layer is W1; and based on a molar content of metal elements other than Li in the matrix, a molar percentage of element Co in the matrix is W2, where W1>W2; and the first coating layer includes a first region having a spinel phase structure.

公开(公告)号：US20240170664A1

公开(公告)日：2024-05-23

申请号：US18428051

申请日：2024-01-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenyuan LIU ,  Gang PENG ,  Ye LANG ,  Leimin XU

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/364 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021

Abstract: A cathode material includes a plurality of first particles. Each first particle includes a secondary particle composed of a plurality of third particles, and the first particle includes a first lithium-containing transition metal oxide; and a plurality of second particles. The second particle includes a fourth particle and/or a secondary particle composed of a plurality of fourth particles, and the second particle includes a second lithium-containing transition metal oxide. The electrochemical device including the cathode material is significantly improved in the aspects of energy density, capacity attenuation and service life.

公开(公告)号：US20230089526A1

公开(公告)日：2023-03-23

申请号：US16970555

申请日：2020-02-21

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED ,  DONGGUAN AMPEREX TECHNOLOGY LIMITED

Inventor： Yangyang ZHANG ,  Gang PENG ,  Ye LANG ,  Wenyuan LIU

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

Abstract: A cathode material includes a lithium composite oxide matrix including lithium (Li) and at least one selected from the group consisting of cobalt (Co), nickel (Ni), manganese (Mn), and aluminium (Al), and has a surface layer which is a rocksalt structure and includes tungsten (W); and a material layer formed on the surface layer of the lithium composite oxide matrix and including tungsten (W) and lithium (Li). The cathode material of the present application provides excellent high-temperature cycle and high-temperature storage performance, and the capability of discharge at a high rate, and improves the safety performance of the electrochemical device.

公开(公告)号：US20210367236A1

公开(公告)日：2021-11-25

申请号：US17252144

申请日：2020-03-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenyuan LIU ,  Gang PENG ,  Ye LANG ,  Leimin XU

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/36 ,  H01M10/0525

Abstract: A cathode material includes: a plurality of first particles. Each first particle includes a secondary particle composed of a plurality of third particles, and the first particle includes a first lithium-containing transition metal oxide; and a plurality of second particles. The second particle includes a fourth particle and/or a secondary particle composed of a plurality of fourth particles, and the second particle includes a second lithium-containing transition metal oxide. The electrochemical device including the cathode material is significantly improved in the aspects of energy density, capacity attenuation and service life.

公开(公告)号：US20240322138A1

公开(公告)日：2024-09-26

申请号：US18622515

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Gang PENG ,  Ye LANG

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/525

CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/525 ,  C01P2002/52 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/40

Abstract: A positive active material, including a matrix and a first material existing on a surface of the matrix. The matrix includes a core and a shell layer. An interplanar spacing d1 of a (003) plane of the first material is less than an interplanar spacing d2 of a (003) plane of the core. By controlling the interplanar spacing d1 of the (003) plane of the first material to be less than the interplanar spacing d2 of the (003) plane of the core, the structural stability of the surface of the positive active material can be improved, and an interfacial charge transfer resistance of the positive active material can be reduced, thereby helping to improve both cycle performance and kinetic performance of the electrochemical device.

公开(公告)号：US20240258496A1

公开(公告)日：2024-08-01

申请号：US18629202

申请日：2024-04-08

Applicant: Ningde Amperex Technology Limited ,  Dongguan Amperex Technology Limited

Inventor： Wenyuan LIU ,  Gang PENG ,  Ye LANG

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

CPC classification number: H01M4/0471 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode material includes secondary particles formed from primary particles. The positive electrode material satisfies the following relational expression: 15%≤(Dv50a−Dv50b)/Dv50b≤80%, where Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, and Dv50 represents a particle size of the positive electrode material at a cumulative volume of 50% in a volume-based particle size distribution as measured by starting from small particle sizes. The secondary particles of the positive electrode material that meets the foregoing condition can form soft agglomerates, so that the electrochemical device is of high cycle performance and high safety performance.

公开(公告)号：US20210280848A1

公开(公告)日：2021-09-09

申请号：US17187629

申请日：2021-02-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenyuan LIU ,  Gang PENG ,  Ye LANG

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

Abstract: A positive electrode material includes secondary particles formed from primary particles. The positive electrode material satisfies the following relational expression: 15%≤(Dv50a−Dv50b)/Dv50b≤80%, where Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, and Dv50 represents a particle size of the positive electrode material at a cumulative volume of 50% in a volume-based particle size distribution as measured by starting from small particle sizes. The secondary particles of the positive electrode material that meets the foregoing condition can form soft agglomerates, so that the electrochemical device is of high cycle performance and high safety performance.

公开(公告)号：US20190355988A1

公开(公告)日：2019-11-21

申请号：US16158639

申请日：2018-10-12

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Ye LANG ,  Gang PENG ,  Leimin XU ,  Yousong CHENG

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

Abstract: The present application relates to a cathode material and a lithium ion battery. Particularly, the cathode material includes a matrix and a coating layer, wherein the matrix includes lithium cobalt oxide bulk-doped with metal element M, and the coating layer has a spinel phase structure doped with metal element Me. The spinel phase structure can form three-dimensional lithium ion channels, thereby increasing a diffusion path of lithium ions, and introducing more electrochemical reaction active sites. Therefore, when the lithium ion battery with the cathode material is discharged at a current of about 6 C at about −10° C., a capacity retention rate is up to about 99% or above as compared with that when the current is about 0.5 C. At the same time, the lithium ion battery also has high temperature stability, and has excellent cycle performance in high-temperature heavy-current charge-discharge environments.