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

    公开(公告)号：US20230068610A1

    公开(公告)日：2023-03-02

    申请号：US17973865

    申请日：2022-10-26

    Applicant: Ningde Amperex Technology Limited

    Inventor： Chao Wang ,  Ting Yi ,  Hang Cui ,  Yuansen Xie

    IPC: H01M4/58 ,  H01M4/62 ,  H01M4/36 ,  C01B32/907

    Abstract: A negative electrode material, and a negative electrode plate, an electrochemical device, and an electronic device including the same. The negative electrode material includes SiMxCy, where 0.5≤x≤2, 0.5≤y≤4, and M includes at least one of boron, nitrogen, oxygen, or aluminum; for SiMxCy, a particle size at a quantity accumulation degree of A % is DNA, a particle size at a volume accumulation degree of B % is DVB, and a half-peak width of a quantity distribution curve is ΔDN; and 2 μm≤(DV50−DN50)≤6 μm, and 1≤(DN99−DN1)/ΔDN≤1.3. The use of the negative electrode material, and the negative electrode plate, the electrochemical device and the electronic device including the same according to the present application achieve good cycle performance and energy density.

    Negative electrode and electrochemical apparatus containing same, and electronic apparatus
    2.
    发明授权
    Negative electrode and electrochemical apparatus containing same, and electronic apparatus 有权

    公开(公告)号：US12294082B2

    公开(公告)日：2025-05-06

    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 ,  H01M4/02

    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 PLATE, ELECTROCHEMICAL APPARATUS, AND ELECTRONIC APPARATUS
    3.
    发明申请
    NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL APPARATUS, AND ELECTRONIC APPARATUS 有权

    公开(公告)号：US20230021755A1

    公开(公告)日：2023-01-26

    申请号：US17951570

    申请日：2022-09-23

    Applicant: Ningde Amperex Technology Limited

    Inventor： Zhihuan Chen ,  Daoyi Jiang ,  Ting Yi ,  Hang Cui

    IPC: H01M4/134 ,  H01M4/38 ,  H01M4/48

    Abstract: A negative electrode plate includes a current collector and an active substance layer provided on the current collector, where the active substance layer includes a silicon-based material, and a proportion by mass of element silicon in the active substance layer has a minimum value X1 and a maximum value X2 among different locations of a same area size, where a value of X1/X2 is M, and M≥0.7; and a weight loss rate of the active substance layer under thermogravimetric (TG) analysis within 800° C. has a minimum value Y1 and a maximum value Y2 among different locations of a same area size, where a value of Y1/Y2 is N, and N≥0.7. In this disclosure, the silicon-based material and a binder in the active substance layer are uniformly dispersed, improving C-rate performance and cycling performance of the electrochemical apparatus and reducing swelling of an electrode assembly.

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