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    NEGATIVE ELECTRODE PLATE, LITHIUM METAL BATTERY CONTAINING SAME, AND ELECTRONIC DEVICE
    23.
    发明申请
    NEGATIVE ELECTRODE PLATE, LITHIUM METAL BATTERY CONTAINING SAME, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220320522A1

    公开(公告)日：2022-10-06

    申请号：US17709023

    申请日：2022-03-30

    Applicant: Ningde Amperex Technology Limited

    Inventor： Wenhao Guan ,  Maohua Chen ,  Yuansen Xie

    IPC: H01M4/66 ,  H01M10/0525

    Abstract: A negative electrode plate includes a negative current collector and a piezoelectric layer. A polarization electric field exists on the piezoelectric layer. A direction of the polarization electric field is directed from the negative current collector to a surface of a negative electrode. A material of the piezoelectric layer includes at least one of a piezoelectric polymer, piezoelectric ceramic, piezoelectric monocrystal, or an inorganic piezoelectric material. The negative electrode plate can control lithium deposition sites, effectively suppress the growth of lithium dendrites, and significantly improve the cycle performance and safety performance of the lithium metal battery.

    Negative electrode and electrochemical apparatus containing same, and electronic apparatus
    24.
    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 MATERIAL, NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL APPARATUS, AND ELECTRONIC APPARATUS
    27.
    发明申请
    NEGATIVE ELECTRODE MATERIAL, NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL APPARATUS, AND ELECTRONIC APPARATUS 有权

    公开(公告)号：US20230034212A1

    公开(公告)日：2023-02-02

    申请号：US17951525

    申请日：2022-09-23

    Applicant: Ningde Amperex Technology Limited

    Inventor： Chao Wang ,  Qunchao Liao ,  Hang Cui ,  Yuansen Xie

    IPC: H01M4/485

    Abstract: A negative electrode material includes a silicon-based material, where for a test cell including an electrode containing the negative electrode material and a counter electrode made of lithium metal, first-cycle efficiency of the test cell is 81% to 86%, and a discharge capacity at an electric potential of the electrode in the test cell being 0.17V accounts for 35% to 65% of a first-cycle discharge capacity of the test cell. A lithiation platform of particles of a silicon-based material is so defined that a lithiation capacity when an electric potential of the silicon-based negative electrode material in a test half cell is 0.17V accounts for 35% to 65% of a first-cycle lithiation capacity of the test half cell, thereby ensuring amorphous characteristics of the silicon-based material, significantly improving cycling performance of the negative electrode material, and reducing a swelling rate of an electrode assembly during cycling.

    Anode material, anode and electrochemical device comprising the anode material
    28.
    发明授权
    Anode material, anode and electrochemical device comprising the anode material 有权

    公开(公告)号：US11563214B2

    公开(公告)日：2023-01-24

    申请号：US17281042

    申请日：2020-03-11

    Applicant: Ningde Amperex Technology Limited

    Inventor： Pengyang Feng ,  Jiali Dong ,  Jia Tang ,  Yuansen Xie

    IPC: H01M4/583 ,  H01M4/02 ,  H01M4/36 ,  H01M4/62 ,  H01M4/66

    Abstract: An anode material having 0.8≤0.06×(Dv50)2−2.5×Dv50+Dv99≤12 (1); and 1.2≤0.2×Dv50−0.006×(Dv50)2+BET≤5 (2), where Dv50 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 50% of the particles, Dv99 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 99% of the particles, and BET is a specific surface area of the anode material, wherein Dv50 and Dv99 are expressed in μm and BET is expressed in m2/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.

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