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    Electrolyte and electrochemical device
    1.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US10826124B2

    公开(公告)日：2020-11-03

    申请号：US16388216

    申请日：2017-07-18

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Yao Jiang ,  Lu Miao ,  Chengdu Liang

    IPC: H01M10/0525 ,  H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D317/34 ,  C07D327/04 ,  H01G11/06 ,  H01G11/64 ,  H01M6/16

    Abstract: An electrolyte and an electrochemical device, which relates to the field of energy storage materials. The electrolyte includes an additive A, an additive B and an additive C, the additive A selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 or Formula I-3, and combinations thereof, the additive B is at least one sulfonate compound, and the additive C is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate the surface activity of the positive electrode material, inhibit the oxidation of the electrolyte, and effectively reduce gas production of a battery, meanwhile the electrolyte can be also adsorbed catalytically active of the graphite surface to form a more stable SEI film, thereby effectively reducing side reactions

    ELECTROLYTE AND BATTERY
    4.
    发明申请
    ELECTROLYTE AND BATTERY 审中-公开

    公开(公告)号：US20190326641A1

    公开(公告)日：2019-10-24

    申请号：US16357549

    申请日：2019-03-19

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Shushi Dou ,  Chunhua Hu ,  Tiancheng Yi ,  Zijun Xu ,  Chengdu Liang

    IPC: H01M10/0568 ,  H01M10/0569 ,  H01M10/0567 ,  H01M10/0525

    Abstract: This application provides an electrolyte and a battery. The electrolyte comprises an electrolytic salt and an organic solvent comprising a cyclic carbonate and a chain carbonate. The electrolyte further comprises an additive A and an additive B, wherein the additive A is a positive-electrode film-forming additive, the additive B is a negative-electrode film-forming additive, and the reduction potential of the additive B is higher than that of the cyclic carbonate, and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The electrolyte of the present application can improve the cycle performance and storage performance of the battery, in particular, improve the cycle performance and storage performance of the battery under high temperature and high voltage conditions, and at the same time balance the low-temperature performance of the battery.

    Lithium-ion battery and apparatus
    5.
    发明授权
    Lithium-ion battery and apparatus 有权

    公开(公告)号：US11316197B2

    公开(公告)日：2022-04-26

    申请号：US17128581

    申请日：2020-12-21

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Yao Jiang ,  Shushi Dou ,  Chengdu Liang

    IPC: H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/15 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/02

    Abstract: The present application provides a lithium-ion battery and an apparatus, and the lithium-ion battery includes an electrode assembly and an electrolytic solution, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separation film. A positive active material of the positive electrode sheet includes Lix1Coy1M1-yO2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolytic solution contains vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, and an additive A. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

    Electrolyte and electrochemical device
    6.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US11316195B2

    公开(公告)日：2022-04-26

    申请号：US16343448

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Zijun Xu ,  Chunhua Hu ,  Tiancheng Yi ,  Yingjie Zhan ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42

    Abstract: Energy storage materials, and specifically, an electrolyte and an electrochemical device, where the electrolyte includes an additive A and an additive B, the additive A is selected from multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one sulfonate compound. The electrochemical device includes the above electrolyte. The electrolyte can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, meanwhile the electrolyte can be adsorbed on catalytically active sites of the graphite surface to form a stable SEI film, thereby effectively reducing side reactions. The electrochemical device using the electrolyte has good high temperature and high voltage cycle performance and storage performance.

    Electrolyte and electrochemical device
    7.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US10897063B2

    公开(公告)日：2021-01-19

    申请号：US16373032

    申请日：2019-04-02

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Lu Miao ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01G11/60 ,  H01G11/64 ,  H01M10/0525

    Abstract: This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.01% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.

    Lithium-ion battery and apparatus
    10.
    发明授权
    Lithium-ion battery and apparatus 有权

    公开(公告)号：US11177508B2

    公开(公告)日：2021-11-16

    申请号：US17146758

    申请日：2021-01-12

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Shushi Dou ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  H01M4/02

    Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolyte, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.

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