公开(公告)号：US20250140830A1

公开(公告)日：2025-05-01

申请号：US19004933

申请日：2024-12-30

Applicant: Ningde Amperex Technology Limited

Inventor： Juan ZHOU ,  Guoxia YUAN ,  Ye LANG ,  Leimin XU

IPC: H01M4/505 ,  H01M4/02 ,  H01M4/131 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42

Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate, and an electrolyte. The negative electrode plate includes a negative electrode active layer, the positive electrode plate includes a positive electrode active layer, the positive electrode active layer includes a positive electrode active material, the positive electrode active layer includes element aluminum, an amount A (mmol) of the element aluminum in the positive electrode active layer and a total area B (m2) of the negative electrode active layer satisfy 3≤A/B≤25, and the positive electrode active material includes lithium manganese oxide and a manganese-containing compound.

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：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：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.