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    Electrolyte and electrochemical device
    31.
    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
    32.
    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
    33.
    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
    34.
    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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