公开(公告)号：US20230335731A1

公开(公告)日：2023-10-19

申请号：US18341099

申请日：2023-06-26

Applicant: Ningde Amperex Technology Limited

Inventor： Wenyuan LIU

IPC: H01M4/525 ,  H01M4/485 ,  H01M50/46 ,  H01M4/04 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M4/0404 ,  H01M4/485 ,  H01M4/505 ,  H01M50/46 ,  H01M2004/028

Abstract: A positive electrode material, including at least one of element Al or element Zr; and particles of the positive electrode material satisfies 0.01≤(Dv99a-Dv99b)/Dv99b≤0.5, where Dv99a and Dv99b are Dv99 values of the particles of the positive electrode material measured before and after ultrasonic treatment respectively. The positive electrode material can improve processability of positive electrode materials and cycling performance of electrochemical apparatuses.

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：US20240243282A1

公开(公告)日：2024-07-18

申请号：US18620128

申请日：2024-03-28

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Wenyuan LIU ,  Ye LANG ,  Guoxia YUAN ,  Leimin XU

IPC: H01M4/58 ,  H01M4/02 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M4/582 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2300/0025

Abstract: An electrochemical device includes a positive electrode plate and an electrolyte, where the positive electrode plate includes a positive electrode material layer, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material contains element Mn and element X, where element X includes at least one of element Co or element Al, and a molar ratio of element X to element Mn is A %, A ranging from 0.1 to 10; and the electrolyte includes a boron-containing lithium salt. Under a synergistic effect of the positive electrode active material and the electrolyte, rate performance and cycling performance of the electrochemical device can be improved.

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：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.