公开(公告)号：US20220149434A1

公开(公告)日：2022-05-12

申请号：US17583240

申请日：2022-01-25

Applicant: Contemporary Amperex Technology Co, Limited.

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

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

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：US20210143477A1

公开(公告)日：2021-05-13

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 ,  H01M4/525 ,  H01M4/505 ,  H01M4/36 ,  H01M10/0525 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04

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 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.

公开(公告)号：US20210143476A1

公开(公告)日：2021-05-13

申请号：US17144517

申请日：2021-01-08

Applicant: Contemporary Amperex Technology Co., Limited

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

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

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-y1 O2-z1Qz1, 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, and M is selected from one 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 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 an aliphatic dinitrile or polynitrile compound with a relatively high oxidation potential. The lithium-ion battery of the present application has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

公开(公告)号：US20210135289A1

公开(公告)日：2021-05-06

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 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/525 ,  C07D295/15 ,  C07D239/04 ,  C07D403/04 ,  C07D241/04 ,  C07D251/04

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.

公开(公告)号：US20210135218A1

公开(公告)日：2021-05-06

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 ,  H01M10/0525 ,  H01M4/505 ,  H01M10/0567

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.

公开(公告)号：US20200185772A1

公开(公告)日：2020-06-11

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 ,  H01M10/0525 ,  H01M6/16

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.

公开(公告)号：US20200176817A1

公开(公告)日：2020-06-04

申请号：US16624192

申请日：2017-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shushi DOU ,  Chunhua HU ,  Tiancheng YI ,  Jian YAN ,  Chengdu LIANG ,  Li HAO

IPC: H01M10/0567 ,  C07C255/04 ,  H01M10/0525

Abstract: The present application relates to the field of energy storage materials, and particularly, to an electrolytic solution and a battery using the electrolytic solution. The electrolytic solution of the present application contains an additive, the additive including a multi-cyano compound represented by formula (I). The multi-cyano compound of the present application has a stronger complexation with a transition metal on the surface of a positive electrode material, and therefore a protective film can be formed on the surface of the positive electrode material, and the dissolution of the transition metal is effectively suppressed; the surface activity of the positive electrode material is reduced, thereby suppressing side reactions, such as the decomposition of the electrolytic solution on the surface of the positive electrode material; and the cycle performance and storage performance of a battery under wide range of working voltage and wide range of operating temperature conditions are thus improved.

公开(公告)号：US20200052332A1

公开(公告)日：2020-02-13

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.