公开(公告)号：US12100810B2

公开(公告)日：2024-09-24

申请号：US18638759

申请日：2024-04-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Peipei Chen ,  Limei Zhang ,  Yao Jiang ,  Jiao Liu

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

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M2300/0025

Abstract: 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.

公开(公告)号：US20240294392A1

公开(公告)日：2024-09-05

申请号：US18527290

申请日：2023-12-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yao Jiang ,  Xinxin Zhang ,  Chuying Ouyang ,  Bo Xu ,  Bin Deng ,  Tianci Yuan ,  Zhiqiang Wang ,  Shangdong Chen

IPC: C01G45/00 ,  H01M4/02 ,  H01M4/36

CPC classification number: C01G45/006 ,  H01M4/366 ,  C01P2004/84 ,  C01P2006/10 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided are a positive electrode active material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a core including Li1+xMn1−yAyP1−z,RzO4, a first coating layer enveloping the core and containing a crystalline pyrophosphate LiaMP2O7 and/or Mb(P2O7)e, a second coating layer enveloping the first coating layer and containing a crystalline oxide M′dOe, and a third coating layer enveloping the second coating layer and containing carbon. The positive electrode active material of this application can reduce Li/Mn anti-site defects generated, reduce dissolving-out amount of manganese, lower the lattice change rate, increase the capacity of the secondary battery, and improve the cycling performance, high-temperature storage performance, and safety performance of the secondary battery.

公开(公告)号：US10826124B2

公开(公告)日：2020-11-03

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

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：US20240356021A1

公开(公告)日：2024-10-24

申请号：US18751234

申请日：2024-06-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: This application discloses a positive electrode active material, including secondary particles and a coating layer applied on an exterior surface of each of the secondary particles, where the secondary particle includes a lithium transition metal oxide that contains a doping element M1, the coating layer includes an oxide of element M2, M1 is selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and M2 is selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element M1 in the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle.

公开(公告)号：US20240308871A1

公开(公告)日：2024-09-19

申请号：US18674940

申请日：2024-05-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: C01G45/12 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/58 ,  H01M4/583

CPC classification number: C01G45/1242 ,  H01M4/0471 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/5825 ,  H01M4/583 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2006/10 ,  H01M2004/028

Abstract: The present application provides a positive electrode active material, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same. The positive electrode active material having a core-shell structure, comprising a core and a shell covering the core, wherein the core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, the shell comprises a first cladding layer covering the core, and a second cladding layer covering the first cladding layer, wherein the first cladding layer comprises pyrophosphate MP2O7 and phosphate XPO4, and the second cladding layer comprises 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：US20240283027A1

公开(公告)日：2024-08-22

申请号：US18638759

申请日：2024-04-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Peipei Chen ,  Limei Zhang ,  Yao Jiang ,  Jiao Liu

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

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M2300/0025

Abstract: 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.

公开(公告)号：US12057576B2

公开(公告)日：2024-08-06

申请号：US17682057

申请日：2022-02-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: This application discloses a positive electrode active material, including secondary particles and a coating layer applied on an exterior surface of each of the secondary particles, where the secondary particle includes a lithium transition metal oxide that contains a doping element M1, the coating layer includes an oxide of element M2, M1 is selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and M2 is selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element M1 in the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle.

公开(公告)号：US11888154B2

公开(公告)日：2024-01-30

申请号：US18211591

申请日：2023-06-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiang Zhou ,  Jiang Liu ,  Baiqing Li ,  Yao Jiang ,  Xiaomei Liu

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/525 ,  H01M4/583 ,  H01M4/02 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/5825 ,  H01M10/052 ,  H01M2004/028 ,  H01M2220/20

Abstract: A positive electrode sheet may comprise a positive electrode current collector and a positive electrode film layer having a single-layer structure or a multi-layer structure provided on at least one surface thereof; when the positive electrode film layer is of a single-layer structure, at least one positive electrode film layer may comprise both a first positive electrode active material and a second positive electrode active material; and/or, when the positive electrode film layer is of a multi-layer structure, at least one layer of the at least one positive electrode film layer may comprise both a first positive electrode active material and a second positive electrode active material; the first positive electrode active material may comprises an inner core containing Li1+xMn1-yAyP1-zRzO4, a first coating layer containing pyrophosphate MP2O7 and phosphate XPO4 and covering the inner core, and a second coating layer containing carbon element and covering the first coating layer.

公开(公告)号：US11613474B2

公开(公告)日：2023-03-28

申请号：US17683389

申请日：2022-03-01

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

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：US11316198B2

公开(公告)日：2022-04-26

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

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