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公开(公告)号：US20220181622A1
公开(公告)日：2022-06-09
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 , H01M4/505 , H01M4/131 , H01M10/0525
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：US20220181675A1
公开(公告)日：2022-06-09
申请号：US17682258
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: H01M10/0525 , C01G53/00
Abstract: This application discloses a positive electrode active material, including bulk particles and a coating layer applied on an exterior surface of each of the bulk particles, where the bulk particle includes a lithium composite oxide that contains element nickel and a doping element M1, and the coating layer includes an oxide of element M2. When the positive electrode active material is in a 11% delithiated state, average valences of element M1 and M2 are α1 and β1, respectively; when the positive electrode active material is in a 78% delithiated state, average valences of element M1 and M2 are α2 and β2, respectively; and α2>α1, β1=β2. Element M1 includes one or more of Si, Ti, Cr, Mo, V, Se, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and element M2 is selected from one or more of Mg, Al, Ca, Zr, Zn, Y, and B.
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公开(公告)号：US20240282969A1
公开(公告)日：2024-08-22
申请号：US18641410
申请日：2024-04-21
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yao JIANG , Chuying OUYANG , Xinxin ZHANG , Bin DENG , Zhiqiang WANG , Tianci YUAN , Bo XU , Shangdong CHEN
IPC: H01M4/62 , H01M4/02 , H01M4/1391 , H01M4/525 , H01M10/0525
CPC classification number: H01M4/623 , H01M4/1391 , H01M4/525 , H01M4/625 , H01M10/0525 , H01M2004/028
Abstract: A positive electrode active material has an inner core and a shell coating the inner core, wherein the inner core comprises at least one of a ternary material, dLi2MnO3·(1−d)LiMO2 and LiMPO4, where 0
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公开(公告)号：US20230361296A1
公开(公告)日：2023-11-09
申请号：US18351925
申请日：2023-07-13
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yao JIANG , Chuying OUYANG , Xinxin ZHANG , Bin DENG , Zhiqiang WANG , Tianci YUAN , Bo XU , Shangdong CHEN
CPC classification number: H01M4/5825 , C01B25/45 , H01M4/366 , H01M4/583 , C01P2006/40 , C01P2002/52 , C01P2004/84 , C01P2002/72 , C01P2002/85 , H01M2004/028
Abstract: A positive electrode active material includes LiaAxMn1-yByP1-zCzO4-nDn. A includes one or more selected from group IA, group IIA, group IIIA, group IIB, group VB, and group VIB. B includes one or more selected from group IA, group IIA, group IIIA, group IVA, group VA, group IIB, group IVB, group VB, group VIB, and group VIII. C includes one or more selected from group IIIA, group IVA, group VA and group VIA. D includes one or more selected from group VIA and group VIIA. a is selected from 0.85 to 1.15. x is selected from 0 to 0.1. y is selected from 0.001 to 0.999. z is selected from 0 to 0.5. n is selected from 0 to 0.5.
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公开(公告)号：US20220185697A1
公开(公告)日：2022-06-16
申请号：US17683392
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: C01G53/00 , H01M10/0525
Abstract: This application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack and apparatus related thereto. The positive electrode active material includes secondary particles formed by agglomeration of primary particles, where the primary particles are a lithium transition metal oxide, and a transition metal site of the lithium transition metal oxide includes nickel and a doping element; and a Young's modulus E of the primary particles satisfies 175 GPa≤E≤220 GPa.
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Patent Agency Ranking
公开(公告)号：US20220185696A1
公开(公告)日：2022-06-16
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: 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 R3m; 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：US20240282963A1
公开(公告)日：2024-08-22
申请号：US18641427
申请日：2024-04-21
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yao JIANG , Chuying OUYANG , Xinxin ZHANG , Bin DENG , Zhiqiang WANG , Tianci YUAN , Bo XU , Shangdong CHEN
CPC classification number: H01M4/5825 , H01M4/136 , H01M4/366 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode active material has LiMPO4, wherein M includes Mn and a non-Mn element, and the non-Mn element satisfies at least one of the following conditions: the ionic radius of the non-Mn element being denoted as a, and the ionic radius of manganese element being denoted as b, |a−b|/b is not greater than 10%; the valence alternation voltage of the non-Mn element being denoted as U, 2 V
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公开(公告)号：US20240120480A1
公开(公告)日：2024-04-11
申请号：US18527284
申请日：2023-12-02
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yao JIANG , Xinxin ZHANG , Chuying OUYANG , Bin DENG , Tianci YUAN , Zhiqiang WANG , Bo XU , Shangdong CHEN
CPC classification number: H01M4/5825 , H01M4/366 , H01M4/382 , H01M4/485 , H01M4/583 , H01M4/60 , H01M4/8885 , H01M10/052 , H01M2004/028
Abstract: A positive electrode active material includes a core containing Li1+xMn1yAyP1−zRzO4, a first coating layer covering the core and containing a crystalline pyrophosphate MaP2O7 and a crystalline oxide M′bOc, and a second coating layer covering the first coating layer.
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公开(公告)号：US20220407059A1
公开(公告)日：2022-12-22
申请号：US17680588
申请日：2022-02-25
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Shushi DOU , Chunhua HU , Yao JIANG , Qi WU , Jinhua HE , Bin DENG
IPC: H01M4/525 , H01M4/505 , H01M4/36 , H01M10/0525
Abstract: This application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack, and apparatus containing such lithium-ion secondary battery. The positive electrode active material includes bulk particles and an element M1-containing oxide coating layer applied on an exterior surface of each of the bulk particles. The bulk particle includes a nickel-containing lithium composite oxide. Bulk phases of the bulk particles are uniformly doped with element M2. A surface layer of the bulk particle is an exterior doped layer doped with element M3. Element M1 and element M3 are each independently selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B, and element M2 includes one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W.
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公开(公告)号：US20220185698A1
公开(公告)日：2022-06-16
申请号：US17683570
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: C01G53/00 , H01M10/0525
Abstract: A positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, a battery pack, and apparatus containing the lithium-ion secondary battery are provided. The positive electrode active material includes secondary particles formed by agglomeration of primary particles, where the primary particles include a layered nickel-containing lithium composite oxide, and the nickel-containing lithium composite oxide includes a doping element; and when the positive electrode active material is charged from an 11% delithiated state to a 78% delithiated state at a rate of 0.1C, a lattice of the primary particles has a maximum shrinkage rate satisfying Δamax≤3.00% in an a-axis direction, and a maximum swelling rate satisfying Δcmax≤3.02% in a c-axis direction.
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