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    NEGATIVE ELECTRODE MATERIAL, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE
    1.
    发明申请
    NEGATIVE ELECTRODE MATERIAL, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220199986A1

    公开(公告)日：2022-06-23

    申请号：US17690159

    申请日：2022-03-09

    Applicant: Ningde Amperex Technology Limited

    Inventor： Ting ZHANG ,  Daoyi JIANG ,  Zhihuan CHEN ,  Hang CUI

    IPC: H01M4/36 ,  H01M4/62 ,  H01M4/48 ,  H01M10/0525

    Abstract: A negative electrode material includes silicon-based particles. The silicon-based particles include a silicon-containing substrate and a polymer layer. The polymer layer exists on at least a part of a surface of the silicon-containing substrate. The polymer layer includes carbon nanotubes and alkali metal ions. The alkali metal ions include Li+, Na+, K+, or any combination thereof. Based on a total weight of the silicon-based particles, a content of the alkali metal ions is approximately 50˜5,000 ppm. A lithium-ion battery prepared by using the negative active material achieves a lower resistance, higher first-time efficiency, higher cycle performance, and higher rate performance.

    NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE
    3.
    发明公开
    NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20230343944A1

    公开(公告)日：2023-10-26

    申请号：US18343306

    申请日：2023-06-28

    Applicant: Ningde Amperex Technology Limited

    Inventor： Zhihuan CHEN ,  Daoyi JIANG

    IPC: H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/134 ,  H01M4/133

    CPC classification number: H01M4/386 ,  H01M4/587 ,  H01M4/622 ,  H01M4/625 ,  H01M4/134 ,  H01M4/133 ,  H01M2004/027

    Abstract: A negative electrode plate includes: a current collector; and an active material layer, located on the current collector. The active material layer includes a silicon-based material, a carbon material, and a binder. Silicon mass fractions in two places of the active material layer are X1 and X2; the two places cover a same area but are located in different positions, X2≥X1, M=X1/X2, and M≥0.7. Lithium mass fractions in the two places are Y1 and Y2, respectively; the two places cover the same area but are located in different positions, Y2≥Y1, N=Y1/Y2, and N≥0.5. Also, uniformity of deintercalation and intercalation of lithium is enhanced by improving the dispersion uniformity of silicon in the active material layer, thereby alleviating volume expansion of the silicon-based material during cycling, and enhancing cycle performance and safety performance of the electrochemical device

    ANODE MATERIAL, ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME
    7.
    发明申请
    ANODE MATERIAL, ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME 有权

    公开(公告)号：US20220199985A1

    公开(公告)日：2022-06-23

    申请号：US17690148

    申请日：2022-03-09

    Applicant: Ningde Amperex Technology Limited

    Inventor： Ting ZHANG ,  Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI

    IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62

    Abstract: An anode material includes silicon-based particles, the silicon-based particles include a silicon-containing substrate, at least a part of the surface of the silicon-containing substrate has: (i) a polymer layer, and/or (ii) an amorphous carbon layer, and the polymer layer or the amorphous carbon layer includes carbon nanotubes, the silicon-based particles include metal elements, the metal elements include Fe, Cu, Zn, Ni, Co, or any combination thereof; wherein the content of the metal elements selected from Fe, Cu, Zn, Ni, Co, or any combination thereof is less than about 2500 ppm based on the total weight of the silicon-based particles. A lithium ion battery with the anode active material has a reduced impedance and K value, and improved first efficiency and cycle performance.

    ANODE MATERIAL, AND ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE USING THE SAME
    8.
    发明申请
    ANODE MATERIAL, AND ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE USING THE SAME 有权

    公开(公告)号：US20220173386A1

    公开(公告)日：2022-06-02

    申请号：US17440723

    申请日：2020-03-05

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI ,  Yuansen XIE

    IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/48

    Abstract: The present application relates to an anode material, and an electrochemical device and an electronic device using the same. The anode material of the present application includes: a silicon compound SiOx, where x is 0.5-1.5; an oxide MeOy layer, the MeOy layer coating at least a portion of the silicon compound SiOx, where Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co or Zr, where y is 0.5-3; and a carbon nanotube layer, the carbon nanotube layer coating at least a portion of the MeOy layer. The anode material can significantly enhance the cycle performance and rate performance of the electrochemical device, and significantly reduce the impedance of the electrochemical device.

    COMPOSITE NEGATIVE ELECTRODE MATERIAL AND APPLICATION THEREOF
    10.
    发明申请
    COMPOSITE NEGATIVE ELECTRODE MATERIAL AND APPLICATION THEREOF 有权

    公开(公告)号：US20230062442A1

    公开(公告)日：2023-03-02

    申请号：US17974775

    申请日：2022-10-27

    Applicant: Ningde Amperex Technology Limited

    Inventor： Ting YI ,  Zhihuan CHEN ,  Hang CUI ,  Yuansen XIE

    IPC: H01M4/38 ,  H01M4/36

    Abstract: A composite negative electrode material includes a Si-M-C composite material and graphene on a surface of the Si-M-C composite material, where M includes at least one of boron, nitrogen, or oxygen. Solid state nuclear magnetic resonance testing of the Si-M-C composite material shows that chemical shifts of element silicon include −5 ppm±5 ppm, −35 ppm±5 ppm, −75 ppm±5 ppm, and −110 ppm±5 ppm, and a peak width at half height at −5 ppm±5 ppm satisfies 7 ppm

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