公开(公告)号：US20220393236A1

公开(公告)日：2022-12-08

申请号：US17697144

申请日：2022-03-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Tiancheng YI ,  Chunhua HU ,  Yao JIANG ,  Shushi DOU ,  Chengdu LIANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/587 ,  C07D241/04 ,  C07C255/04

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 separation film. The positive active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1

公开(公告)号：US20220209296A1

公开(公告)日：2022-06-30

申请号：US17697265

申请日：2022-03-17

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

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-y1O2-z1Qz1, 0.5≤x1≤1.2, 0.85≤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.

公开(公告)号：US20210111433A1

公开(公告)日：2021-04-15

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 ,  H01M10/0525 ,  H01M4/62 ,  H01M10/42

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.

公开(公告)号：US20190326635A1

公开(公告)日：2019-10-24

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 ,  H01M10/0525 ,  H01G11/64 ,  H01G11/60

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.

公开(公告)号：US20190326633A1

公开(公告)日：2019-10-24

申请号：US16355639

申请日：2019-03-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Tiancheng YI ,  Chunhua HU ,  Zijun XU ,  Lu MIAO ,  Chengdu LIANG

IPC: H01M10/0567 ,  H01M10/0569 ,  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 0.001% 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 and the electrolyte has a conductivity of 4 mS/cm to 12 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.

公开(公告)号：US20220123300A1

公开(公告)日：2022-04-21

申请号：US17563694

申请日：2021-12-28

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

Abstract: 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 additive 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.

公开(公告)号：US20210280910A1

公开(公告)日：2021-09-09

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

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.

公开(公告)号：US20210135286A1

公开(公告)日：2021-05-06

申请号：US17056805

申请日：2019-12-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Tiancheng YI ,  Chunhua HU ,  Shushi DOU ,  Yao Jiang ,  Chengdu Liang

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/42 ,  C01G51/00 ,  C07D241/04 ,  C07D239/04 ,  C07D251/04 ,  C07D403/04 ,  C07D295/145

Abstract: This 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 plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 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 electrolyte 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.

公开(公告)号：US20200127330A1

公开(公告)日：2020-04-23

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

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

公开(公告)号：US20190267670A1

公开(公告)日：2019-08-29

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

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.