公开(公告)号：US20230202864A1

公开(公告)日：2023-06-29

申请号：US18109866

申请日：2023-02-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: C01G53/00 ,  H01M10/0525

CPC classification number: C01G53/44 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

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.

公开(公告)号：US11417883B2

公开(公告)日：2022-08-16

申请号：US17565450

申请日：2021-12-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/02

Abstract: The present application discloses positive electrode active material, preparation method thereof, positive electrode plate, lithium-ion secondary battery and battery module, pack, and apparatus. The positive electrode active material includes a nickel-containing lithium composite oxide satisfying a chemical formula Li1+a[NixCoyMnzMb]O2, in the formula, M is a doping element at transition metal site, 0.5≤x

公开(公告)号：US20210075063A1

公开(公告)日：2021-03-11

申请号：US17056740

申请日：2019-12-13

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/48 ,  H01M4/38 ,  H01M4/587 ,  H01M4/36 ,  C07D239/04 ,  C07D251/04 ,  C07F9/09 ,  C07F9/141

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, an additive B, and an additive C. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The additive B is a silyl phosphite compound or a silyl phosphate compound or a mixture thereof. The additive C is a halogen substituted cyclic carbonate compound.

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.

公开(公告)号：US11760657B2

公开(公告)日：2023-09-19

申请号：US18109866

申请日：2023-02-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi Dou ,  Chunhua Hu ,  Yao Jiang ,  Qi Wu ,  Jinhua He ,  Bin Deng

IPC: H01M10/00 ,  C01G53/00 ,  H01M10/0525

CPC classification number: C01G53/44 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

公开(公告)号：US11695157B2

公开(公告)日：2023-07-04

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 ,  H01M10/0568 ,  H01M4/02

CPC classification number: H01M10/0567 ,  C01G51/006 ,  C01G51/42 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/145 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/4235 ,  C01P2002/52 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2300/0025

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：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.

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.

公开(公告)号：US11239500B2

公开(公告)日：2022-02-01

申请号：US17056740

申请日：2019-12-13

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  C07D239/04 ,  C07D251/04 ,  C07F9/09 ,  C07F9/141 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

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