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    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS
    2.
    发明公开
    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS 审中-公开

    公开(公告)号：US20240282943A1

    公开(公告)日：2024-08-22

    申请号：US18620055

    申请日：2024-03-28

    Applicant: Ningde Amperex Technology Limited

    Inventor： Chunrui XU ,  Yanyan XU ,  Shaoyun ZHOU

    IPC: H01M4/38 ,  H01M4/02 ,  H01M10/0568 ,  H01M10/0569

    CPC classification number: H01M4/38 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/0042 ,  H01M2300/0051

    Abstract: An electrochemical apparatus includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, where the positive electrode plate includes a positive electrode active material, the positive electrode active material includes element Co, and the electrolyte includes a polynitrile compound. The amount of the polynitrile compound is adjusted according to the amount of element Co in the positive electrode active material, and the polynitrile compound is in coordination complexation with Co with other additives used in combination. The structural stability of the positive electrode material with lithium highly released is significantly improved, inhibiting leaching of Co, reducing oxidization of the electrolyte by the positive electrode active material, and inhibiting related side reactions, thereby effectively improving performance of the electrochemical apparatus under high temperature.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE CONTAINING SAME
    3.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE CONTAINING SAME 审中-公开

    公开(公告)号：US20240356076A1

    公开(公告)日：2024-10-24

    申请号：US18756240

    申请日：2024-06-27

    Applicant: Ningde Amperex Technology Limited

    Inventor： Yezhen ZHENG ,  Shaoyun ZHOU

    IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0568

    CPC classification number: H01M10/0567 ,  H01M4/525 ,  H01M10/0568 ,  H01M2004/021 ,  H01M2004/028

    Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The electrolyte solution includes an additive. An electrolyte retention coefficient of the electrochemical device is a g/Ah, satisfying: 0.5≤a ≤3.5. Based on a total mass of the electrolyte solution, a mass percentage of the additive is b %, satisfying: 0.005≤b>3. The additive includes at least one of lithium bis(oxalato)borate, vinyl ethylene carbonate, methylene methane disulfonate, triallyl phosphate, trifluoromethyl ethylene carbonate, or prop-1-ene-1,3-sultone. In the electrochemical device of this application, an appropriate electrolyte retention amount is maintained, and the foregoing additive is added in the electrolyte solution in an appropriate amount, thereby effectively improving the low-temperature discharge performance and safety performance of the electrochemical device. The electronic device containing the electrochemical device also exhibits good low-temperature discharge performance and safety performance.

    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS
    4.
    发明申请
    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS 有权

    公开(公告)号：US20250023103A1

    公开(公告)日：2025-01-16

    申请号：US18901400

    申请日：2024-09-30

    Applicant: Ningde Amperex Technology Limited

    Inventor： Chunrui XU ,  Shaoyun ZHOU

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569

    Abstract: An electrochemical apparatus including: a positive electrode, where the positive electrode includes a positive electrode active material layer, and the positive electrode active material layer includes a positive electrode active material, wherein the positive electrode active material includes lithium nickel oxide and an electrolyte. The electrolyte includes fluoroethylene carbonate, where based on a total mass of the electrolyte, a mass percentage of the fluoroethylene carbonate is a %. In this application, a charge cut-off voltage U V of the electrochemical apparatus, a molar ratio x of nickel in the lithium nickel oxide, and the mass percentage a % of the fluoroethylene carbonate in the electrolyte satisfy the following relationship: a ≤ 2.3 x 0.7 - 6 ⁢ x 0 . 1 ( U - 4 . 2 ) .

    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS
    7.
    发明公开
    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS 审中-公开

    公开(公告)号：US20240291036A1

    公开(公告)日：2024-08-29

    申请号：US18612373

    申请日：2024-03-21

    Applicant: Ningde Amperex Technology Limited

    Inventor： Junfei LIU ,  Shaoyun ZHOU ,  Disheng LAN ,  Yanyan XU

    IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/62

    CPC classification number: H01M10/0567 ,  H01M4/625 ,  H01M2004/028

    Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the positive electrode includes a positive electrode current collector, a positive electrode active substance layer, and a conductive coating disposed between the positive electrode current collector and the positive electrode active substance layer; the electrolyte includes a first fluorine-containing metal salt, where the first fluorine-containing metal salt includes at least one of fluorine-containing sulfonimide lithium salts; and the electrochemical apparatus satisfies the following relationship: 0.1≤X/d≤105, where X g/m2 is mass per unit area of fluorine-containing sulfonimide lithium salt contained in the electrochemical apparatus on one surface of the positive electrode current collector, and d μm is thickness of the conductive coating on one surface of the positive electrode current collector.

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