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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.
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公开(公告)号：US20240254003A1
公开(公告)日：2024-08-01
申请号：US18635016
申请日：2024-04-15
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yao Jiang , Chuying Ouyang , Xinxin Zhang , Bin Deng , Bo Xu , Zhiqiang Wang , Tianci Yuan , Shangdong Chen
CPC classification number: C01G45/1228 , H01M4/0471 , H01M4/366 , H01M4/505 , H01M4/5825 , H01M4/583 , C01P2006/10 , C01P2006/40 , H01M2004/028
Abstract: Provided are a positive electrode active material with a core-shell structure, a preparation method of positive electrode active material, 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 containing LimAxMn1-yByP1-zCzO4-nDn, a first coating layer covering the core and containing a crystalline pyrophosphate MaP2O7 and an oxide M′bOc, and a second coating layer covering the first coating layer. The positive electrode active material in this application can reduce the generation of Li/Mn antisite defects, reduce the dissolution of manganese, and decrease the lattice change rate, increasing the capacity of the secondary battery and improving the cycling performance, high-temperature storage performance, and safety performance of the secondary battery.
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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.
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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
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.
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公开(公告)号：US20240332527A1
公开(公告)日：2024-10-03
申请号：US18740540
申请日：2024-06-12
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Tianci Yuan , Yao Jiang , Xinxin Zhang , Chuying Ouyang , Lingjing Wu , Shangdong Chen , Weibin Kang , Zhiqiang Wang , Shaojun Liu , Bin Deng
CPC classification number: H01M4/5825 , H01M4/0471 , H01M4/366 , H01M4/583 , H01M10/052 , H01M2004/021 , H01M2004/028
Abstract: 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.
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Patent Agency Ranking
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
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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.
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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
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.
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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.
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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.
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