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    NEGATIVE ELECTRODE AND ELECTROCHEMICAL APPARATUS CONTAINING SAME, AND ELECTRONIC APPARATUS
    13.
    发明申请
    NEGATIVE ELECTRODE AND ELECTROCHEMICAL APPARATUS CONTAINING SAME, AND ELECTRONIC APPARATUS 有权

    公开(公告)号：US20220223851A1

    公开(公告)日：2022-07-14

    申请号：US17707129

    申请日：2022-03-29

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Ting YI ,  Hang CUI ,  Yuansen XIE

    IPC: H01M4/38 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

    Abstract: A negative electrode includes a negative current collector, a first negative active material layer and a second negative active material layer. The first negative active material layer is arranged on one side of a first portion of the negative current collector, and the second negative active material layers are arranged on two sides of a second portion, different from the first portion, of the negative current collector. A ratio of a weight per unit area of the first negative active material layer to a weight per unit area of the second negative active material layer on the negative current collector is 0.47 to 0.52, and a ratio of a compacted density of the first negative active material layer to a compacted density of the second negative active material layer is 0.9 to 1.1.

    NEGATIVE ELECTRODE, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE
    14.
    发明申请
    NEGATIVE ELECTRODE, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220223850A1

    公开(公告)日：2022-07-14

    申请号：US17707059

    申请日：2022-03-29

    Applicant: Ningde Amperex Technology Limited

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

    IPC: H01M4/38 ,  H01M4/04 ,  H01M4/583 ,  H01M10/0525

    Abstract: A negative electrode includes a current collector and a coating located on the current collector. The coating includes silicon-based particles and graphite particles. The silicon-based particles include a silicon-containing substrate and a polymer layer. The polymer layer includes a polymer and carbon nanotubes. The polymer layer is located on at least a part of a surface of the silicon-containing substrate. A minimum value of film resistances at different positions on a surface of the coating is R1, a maximum value of the film resistances is R2, an R1/R2 ratio is M, and a percentage of a weight of the silicon-based particles in a total weight of the silicon-based particles and the graphite particles is N, where M≥0.5, and N is 2 wt %-80 wt %.

    SECONDARY BATTERY AND ELECTRONIC DEVICE
    16.
    发明公开
    SECONDARY BATTERY AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240363868A1

    公开(公告)日：2024-10-31

    申请号：US18644656

    申请日：2024-04-24

    Applicant: Ningde Amperex Technology Limited

    Inventor： Xiaoping LIN ,  Yuansen XIE

    IPC: H01M4/62 ,  H01M4/02 ,  H01M10/0585

    CPC classification number: H01M4/625 ,  H01M10/0585 ,  H01M2004/021 ,  H01M2004/027

    Abstract: A secondary battery includes a negative electrode plate and a separator. The negative electrode plate includes a three-dimensional framework. The three-dimensional framework includes a first framework layer and a second framework layer. The first framework layer includes one-dimensional conductive fibers. The second framework layer includes a zero-dimensional material, a one-dimensional material, and a two-dimensional material. The zero-dimensional material is a lithiophilic material. By adjusting and controlling the thicknesses of the three-dimensional framework, the first framework layer, and the second framework layer, the mass percent of the zero-dimensional material, and the mass ratio between the one-dimensional material and the two-dimensional material to fall within the ranges specified herein, a lithiophilic gradient is favorably constructed in the three-dimensional framework, so as to enable lithium metal to enter the interior of the three-dimensional framework and deposit from bottom upward, thereby improving the Coulombic efficiency and cycle performance of the secondary battery.

    COMPOSITE NEGATIVE ELECTRODE MATERIAL AND APPLICATION THEREOF
    19.
    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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