公开(公告)号：US20240332527A1

公开(公告)日：2024-10-03

申请号：US18740540

申请日：2024-06-12

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Tianci Yuan ,  Yao Jiang ,  Xinxin Zhang ,  Chuying Ouyang ,  Lingjing Wu ,  Shangdong Chen ,  Weibin Kang ,  Zhiqiang Wang ,  Shaojun Liu ,  Bin Deng

IPC分类号： H01M4/58 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/583 ,  H01M10/052

CPC分类号： H01M4/5825 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/583 ,  H01M10/052 ,  H01M2004/021 ,  H01M2004/028

摘要： Provided are a positive electrode active material, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device. The positive electrode active material having a core-shell structure, including a core and a shell cladding the core, the core has a chemical formula of LimAxMn1-yByP1-zCzO4-nDn, the shell includes a first cladding layer cladding the core, a second cladding layer cladding the first cladding layer and a third cladding layer cladding the second cladding layer, the first cladding layer includes crystalline pyrophosphates LiaMP2O7 and/or Mb(P2O7)c, the second cladding layer includes crystalline phosphate XPO4, and the third cladding layer is carbon. The positive electrode active material of the present application enables the secondary battery and electrical device to have a relatively high energy density, and good cycling performance, rate performance and safety performance.

公开(公告)号：US20240322142A1

公开(公告)日：2024-09-26

申请号：US18736563

申请日：2024-06-07

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Limei Zhang ,  Peipei Chen ,  Yao Jiang ,  Jiao Liu

IPC分类号： H01M4/36 ,  H01M4/02 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M10/42

CPC分类号： H01M4/366 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M10/4235 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0037

摘要： Provided are a secondary battery, a battery module, a battery pack and an electrical apparatus. The secondary battery includes a positive electrode plate and a non-aqueous electrolyte solution. A positive electrode active material includes an inner core and a shell cladding the inner core. The inner core includes Li1+xMn1−yAyP1−zRzO4. The shell includes a first cladding layer cladding the inner core and a second cladding layer cladding the first cladding layer. The first cladding layer includes pyrophosphate MP2O7 and phosphate XPO4. The second cladding layer includes carbon. The non-aqueous electrolyte solution includes a first additive. The first additive includes one or more compounds in a group consisting of a compound shown in Formula 1, a compound shown in Formula 2 and a compound shown in Formula 3. The rate performance, cycling performance and high temperature stability of a lithium manganese phosphate secondary battery are increased.

公开(公告)号：US11417883B2

公开(公告)日：2022-08-16

申请号：US17565450

申请日：2021-12-29

申请人： Contemporary Amperex Technology Co., Limited

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

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

摘要： 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：US20210135286A1

公开(公告)日：2021-05-06

申请号：US17056805

申请日：2019-12-13

申请人： Contemporary Amperex Technology Co., Limited

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

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

摘要： 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：US20210075063A1

公开(公告)日：2021-03-11

申请号：US17056740

申请日：2019-12-13

申请人： Contemporary Amperex Technology Co., Limited

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

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

摘要： 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：US11973218B2

公开(公告)日：2024-04-30

申请号：US18487266

申请日：2023-10-16

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Xiang Zhou ,  Baiqing Li ,  Jiang Liu ,  Yao Jiang ,  Xiaomei Liu

IPC分类号： H01M4/36 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525

CPC分类号： H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  H01M2220/20

摘要： A novel positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer with a single-layer structure or a multi-layer structure. When the positive electrode film layer is a single-layer structure, at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active material; and/or, when the positive electrode film layer is a multi-layer structure, at least one layer of at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active materials. The first positive electrode active material includes an inner core, a first cladding layer comprising crystalline pyrophosphates, a second cladding layer comprising crystalline phosphate, and a third cladding layer.

公开(公告)号：US20230202864A1

公开(公告)日：2023-06-29

申请号：US18109866

申请日：2023-02-15

申请人： Contemporary Amperex Technology Co., Limited

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

IPC分类号： C01G53/00 ,  H01M10/0525

CPC分类号： C01G53/44 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

摘要： 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

申请人： Contemporary Amperex Technology Co., Limited

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

IPC分类号： H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/15 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/02

摘要： 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：US10897063B2

公开(公告)日：2021-01-19

申请号：US16373032

申请日：2019-04-02

申请人： Contemporary Amperex Technology Co., Limited

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

IPC分类号： H01M10/0567 ,  H01G11/60 ,  H01G11/64 ,  H01M10/0525

摘要： 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：US12100810B2

公开(公告)日：2024-09-24

申请号：US18638759

申请日：2024-04-18

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Peipei Chen ,  Limei Zhang ,  Yao Jiang ,  Jiao Liu

IPC分类号： H01M10/0567 ,  H01M4/36 ,  H01M4/505 ,  H01M4/58

CPC分类号： H01M10/0567 ,  H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M2300/0025

摘要： The present application provides a secondary battery and a battery module, battery pack and electrical device containing the same. The secondary battery comprises a positive electrode plate and an non-aqueous electrolytic solution, wherein the positive electrode plate comprises a positive electrode active material with a core-shell structure, said positive electrode active material comprising an core and a shell covering said core, said core has a chemical formula of Li1+xMn1-yAyP1-zRzO4; said shell comprises a first cladding layer covering said core, a second cladding layer covering said first cladding layer and a third cladding layer covering said second cladding layer, said non-aqueous electrolytic solution comprises a first additive, said first additive comprises one or more of compounds as shown by Formula 1, Formula 2 and Formula 3.