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    Lithium-ion battery and apparatus
    11.
    发明授权
    Lithium-ion battery and apparatus 有权

    公开(公告)号：US11152643B2

    公开(公告)日：2021-10-19

    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.

    Electrolyte and battery
    12.
    发明授权
    Electrolyte and battery 有权

    公开(公告)号：US11121406B2

    公开(公告)日：2021-09-14

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

    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.

    Electrolyte and battery
    13.
    发明授权
    Electrolyte and battery 有权

    公开(公告)号：US10862170B2

    公开(公告)日：2020-12-08

    申请号：US16343326

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Li Hao ,  Yingjie Zhan ,  Chengdu Liang

    IPC: H01M10/0567 ,  H01M10/0525

    Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and a battery using the electrolyte. The electrolyte contains an additive selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof. The addition of the multi-cyano six-membered N-heterocyclic compound as an additive in the electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material and inhibit oxidation of the electrolyte. The battery using the electrolyte according the present disclosure has good cycle performance at high temperature and high voltage and good storage performance, while gas production of the battery is reduced.

    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    14.
    发明申请
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 审中-公开

    公开(公告)号：US20190326634A1

    公开(公告)日：2019-10-24

    申请号：US16370973

    申请日：2019-03-30

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Lu Miao ,  Zijun Xu ,  Chengdu Liang

    IPC: H01M10/0567

    Abstract: This application provides an electrolyte and an electrochemical device, wherein the electrolyte comprises an additive A and an additive B, the additive A is present in an amount of 0.001% 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. This application can improve the cycle performance and storage performance of the electrochemical device, especially the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions.

    Electrolyte and electrochemical device
    16.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US11309582B2

    公开(公告)日：2022-04-19

    申请号：US16342852

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

    IPC: H01M10/00 ,  H01M10/0567 ,  C07D295/15 ,  C07D317/38 ,  C07D327/10 ,  H01G11/64 ,  H01M10/0525 ,  H01G11/06

    Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of 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 unsaturated bond-containing cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.

    Electrolyte and electrochemical device
    17.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US11264646B2

    公开(公告)日：2022-03-01

    申请号：US16342400

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

    IPC: H01M10/0567 ,  H01G11/06 ,  H01G11/64 ,  H01M6/16 ,  H01M10/0525

    Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of 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 halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.

    Lithium-ion battery and apparatus
    18.
    发明授权
    Lithium-ion battery and apparatus 有权

    公开(公告)号：US11264613B2

    公开(公告)日：2022-03-01

    申请号：US17144455

    申请日：2021-01-08

    Applicant: Contemporary Amperex Technology Co., Limited

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

    IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/02

    Abstract: The present application provides a lithium-ion battery and an apparatus. 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 in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1. A negative active material in the negative electrode sheet includes one or more of Si, SiOx2, a Si/C composite material, and a Si alloy. The electrolytic solution contains an additive A and an addictive B, the additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential, and the additive B is a halogen-substituted cyclic carbonate compound. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

    Lithium-ion battery and apparatus
    19.
    发明授权
    Lithium-ion battery and apparatus 有权

    公开(公告)号：US11258099B2

    公开(公告)日：2022-02-22

    申请号：US17130307

    申请日：2020-12-22

    Applicant: Contemporary Amperex Technology Co., Limited

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

    IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

    Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolytic solution, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film. A positive electrode active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1, and the positive electrode active material is a mixture of large particles Lix1Coy1M1-y1O2-z1Qz1 and small particles Lix1Coy1M1-y1O2-z1Qz1; an average particle size D50 of the large particles Lix1Coy1M1-y1O2-z1Qz1 is 10 μm-17 μm, and an average particle size D50 of the small particles Lix1Coy1M1-y1O2-z1Qz1 is 2 μm-7 μm. The electrolytic solution contains an additive A that 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.

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