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公开(公告)号：US20250140814A1
公开(公告)日：2025-05-01
申请号：US19004889
申请日：2024-12-30
Applicant: Ningde Amperex Technology Limited
Inventor： Guoxia YUAN , Ye LANG , Juan ZHOU , Leimin XU
Abstract: An electrochemical device, including a positive electrode plate. The positive electrode plate includes a positive active material layer. When the electrochemical device is in a fully discharged state, an X-ray diffraction pattern of the positive active material layer exhibits a first diffraction peak and a second diffraction peak in a range of 17.8° to 19.2°. A diffraction angle of the first diffraction peak is smaller than a diffraction angle of the second diffraction peak. The electrochemical device achieves an increased energy density and improved cycle performance.
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公开(公告)号：US20240413304A1
公开(公告)日：2024-12-12
申请号：US18399950
申请日：2023-12-29
Applicant: Ningde Amperex Technology Limited
Inventor： Guoxia YUAN
Abstract: An electrochemical device, including a positive electrode, a negative electrode, and an electrolytic solution. A positive active material includes a manganese-containing composite material. A lithium manganese oxide characteristic peak (400) as a first diffraction peak and a lithium nickel cobalt manganese oxide characteristic peak (104) as a second diffraction peak are included in a range of 40° to 46° in an XRD diffraction pattern of the positive active material under a condition of 30% SOC to 40% SOC. A 2θ angle of the first diffraction peak is smaller than a 2θ angle of the second diffraction peak. A peak intensity of the first diffraction peak is A, a peak intensity of the second diffraction peak is B, and satisfying: 0.01≤B/A≤0.55, thereby enhancing the high-temperature cycle performance and storage performance of the electrochemical device, and improving the low-temperature cycle performance of the electrochemical device.
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公开(公告)号：US20250140832A1
公开(公告)日：2025-05-01
申请号：US19005061
申请日：2024-12-30
Applicant: Ningde Amperex Technology Limited
Inventor： Juan ZHOU , Ye LANG , Guoxia YUAN , Leimin XU
IPC: H01M4/505 , H01M4/02 , H01M4/58 , H01M10/0567
Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a positive electrode active layer, the positive electrode active layer includes a positive electrode active material, and the positive electrode active material includes an additive. During charge/discharge the electrochemical device, when the electrochemical device is in a fully discharged state, an X-ray diffraction pattern of the positive electrode plate has a characteristic diffraction peak 1 at a diffraction angle 2θ ranging from 17.5° to 19.5°, and the additive includes manganese element.
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公开(公告)号：US20250140831A1
公开(公告)日：2025-05-01
申请号：US19005048
申请日：2024-12-30
Applicant: Ningde Amperex Technology Limited
Inventor： Guoxia YUAN , Ye LANG , Leimin XU
Abstract: A positive active material, including a lithium manganese oxide. An X-ray diffraction pattern of the positive active material exhibits a first diffraction peak in a range of 14.3° to 16.3° and a second diffraction peak in a range of 17.3° to 19.3°. The positive active material of this application achieves a high specific charge capacity and high structural stability, and can increase the energy density and lifespan of the electrochemical device.
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Patent Agency Ranking
公开(公告)号：US20250140795A1
公开(公告)日：2025-05-01
申请号：US19005031
申请日：2024-12-30
Applicant: Ningde Amperex Technology Limited
Inventor： Juan ZHOU , Guoxia YUAN , Ye LANG , Leimin XU
IPC: H01M4/36 , H01M4/02 , H01M4/131 , H01M4/505 , H01M10/0525
Abstract: An electrochemical apparatus, including a positive electrode plate, where the positive electrode plate includes a positive electrode active material layer, and the positive electrode active material layer includes a first lithium manganese oxide and a second lithium manganese oxide; and in a fully discharged state of the electrochemical apparatus, through Raman test, the first lithium manganese oxide has a characteristic peak A in a range of 507 cm−1±10 cm−1 and a characteristic peak B in a range of 660 cm−1±10 cm−1, and the second lithium manganese oxide has a characteristic peak C in a range of 625 cm−1±10 cm−1. The electrochemical apparatus has high initial coulombic efficiency and excellent cycling performance on the basis of high energy density.
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公开(公告)号：US20240332523A1
公开(公告)日：2024-10-03
申请号：US18743441
申请日：2024-06-14
Applicant: Ningde Amperex Technology Limited
Inventor： Guoxia YUAN
IPC: H01M4/505 , H01M4/02 , H01M4/131 , H01M10/0525 , H01M10/0567 , H01M10/0569
CPC classification number: H01M4/505 , H01M4/131 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M2004/021 , H01M2004/028 , H01M2300/0037
Abstract: An electrochemical apparatus includes a positive electrode plate, where the positive electrode plate includes a positive electrode material layer, the positive electrode material layer includes a positive electrode active material, and in a cross-sectional scanning electron microscope image of the positive electrode material layer, a minimum circumscribed circle radius of the profile of a positive electrode active material particle with an area greater than 5 μm2 is Rc, and a maximum inscribed circle radius of the profile of the positive electrode active material particle with an area greater than 5 μm2 is Ri, satisfying 1
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公开(公告)号：US20250140830A1
公开(公告)日：2025-05-01
申请号：US19004933
申请日：2024-12-30
Applicant: Ningde Amperex Technology Limited
Inventor： Juan ZHOU , Guoxia YUAN , Ye LANG , Leimin XU
Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate, and an electrolyte. The negative electrode plate includes a negative electrode active layer, the positive electrode plate includes a positive electrode active layer, the positive electrode active layer includes a positive electrode active material, the positive electrode active layer includes element aluminum, an amount A (mmol) of the element aluminum in the positive electrode active layer and a total area B (m2) of the negative electrode active layer satisfy 3≤A/B≤25, and the positive electrode active material includes lithium manganese oxide and a manganese-containing compound.
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公开(公告)号：US20240274792A1
公开(公告)日：2024-08-15
申请号：US18437460
申请日：2024-02-09
Applicant: Ningde Amperex Technology Limited
Inventor： Guoxia YUAN
CPC classification number: H01M4/364 , H01M4/505 , H01M4/525 , H01M2004/028
Abstract: An electrochemical device includes a positive electrode. The positive electrode includes a positive current collector and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a lithium manganese oxide. The lithium manganese oxide includes aluminum and sodium. Based on a weight of the positive active material, a weight percentage of the aluminum is A %, a weight percentage of the sodium is B %, and the electrochemical device satisfies 0.01≤A≤2 and 0.001≤B≤1.
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公开(公告)号：US20240243282A1
公开(公告)日：2024-07-18
申请号：US18620128
申请日：2024-03-28
Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED
Inventor： Wenyuan LIU , Ye LANG , Guoxia YUAN , Leimin XU
IPC: H01M4/58 , H01M4/02 , H01M10/0567 , H01M10/0568
CPC classification number: H01M4/582 , H01M10/0567 , H01M10/0568 , H01M2004/021 , H01M2004/028 , H01M2300/0025
Abstract: An electrochemical device includes a positive electrode plate and an electrolyte, where the positive electrode plate includes a positive electrode material layer, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material contains element Mn and element X, where element X includes at least one of element Co or element Al, and a molar ratio of element X to element Mn is A %, A ranging from 0.1 to 10; and the electrolyte includes a boron-containing lithium salt. Under a synergistic effect of the positive electrode active material and the electrolyte, rate performance and cycling performance of the electrochemical device can be improved.
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