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公开(公告)号：US20250029998A1
公开(公告)日：2025-01-23
申请号：US18897304
申请日：2024-09-26
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Jia TANG
Abstract: An electrochemical device includes a negative electrode. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer includes a negative active material. The negative active material layer satisfies 0.1≤SA/S002≤0.3, where SA is a peak area value of an A peak corresponding to a diffraction angle 2θ of 42.4° to 43.6° in an XRD pattern of the negative active material layer, and S002 is a peak area value of a 002 peak in the XRD pattern of the negative active material layer. The electrochemical device has excellent cycle performance and kinetic performance in addition to a high gravimetric capacity.
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公开(公告)号：US20240243285A1
公开(公告)日：2024-07-18
申请号：US18619837
申请日：2024-03-28
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Jia TANG
IPC: H01M4/587 , H01M4/02 , H01M4/133 , H01M10/0525 , H01M10/0569
CPC classification number: H01M4/587 , H01M4/133 , H01M10/0525 , H01M10/0569 , H01M2004/021 , H01M2300/004
Abstract: An electrochemical device includes a positive electrode, a separator, an electrolyte solution, and a negative electrode. The negative electrode includes a negative current collector and a negative active material layer disposed on a surface of the negative current collector. The electrochemical device satisfies: A=W/(ID/IG), and 150≤A≤1000. As tested by differential scanning calorimetry, the negative active material layer exhibits an exothermic peak at a temperature ranging from a room temperature to 450° C. A peak area of the exothermic peak is W J/g. As tested by Raman spectroscopy, a ratio of a peak intensity at a wavenumber 1350 cm−1 to a peak intensity at a wavenumber 1580 cm−1 of the negative active material layer is ID/IG. The electrochemical device of this application achieves improved kinetic performance and cycle performance in addition to a high capacity.
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公开(公告)号：US20240021775A1
公开(公告)日：2024-01-18
申请号：US18373981
申请日：2023-09-28
Applicant: Ningde Amperex Technology Limited
Inventor： Yuxin CAI , Pengyang FENG , Jiali DONG , Yuansen XIE
IPC: H01M4/04 , H01M10/0525 , H01M4/583
CPC classification number: H01M4/0404 , H01M10/0525 , H01M4/583 , H01M2004/027
Abstract: A negative electrode includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes negative active material particles. The negative active material particles include secondary particles. The negative active material layer includes a pore A. A diameter of the pore A is 59 nm to 73 nm when tested by a mercury intrusion porosimetry. A ratio C004/C110 of the negative active material layer is 6 to 20. The electrochemical device using the negative electrode according to this application possesses a relatively high capacity and improved performance of resistance to cycle expansion.
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4.发明申请公开(公告)号：US20220223865A1
公开(公告)日：2022-07-14
申请号：US17708288
申请日：2022-03-30
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Yuxin CAI , Jiali DONG , Yuansen XIE
IPC: H01M4/583 , H01M10/0525
Abstract: A negative electrode active material having a median particle size D1v50, the negative electrode active material has a median particle size D2v50 under a pressure of 1 t, and D2v50/D1v50 is not less than 0.8. The negative electrode active material achieves a balance between high capacity and high cycle expansion performance of an electrochemical device.
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公开(公告)号：US20250132339A1
公开(公告)日：2025-04-24
申请号：US19006425
申请日：2024-12-31
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Jia TANG
IPC: H01M4/587 , H01M4/02 , H01M4/133 , H01M10/0525
Abstract: A secondary battery includes a negative electrode, which includes a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector, and the negative electrode active material layer includes graphite particles. In a thickness direction of the negative electrode active material layer, a region from a surface of the negative electrode active material layer to a depth of 10 μm inside the negative electrode active material layer is a first region. The secondary battery satisfies 3≤m1/n1≤18 and 5%≤n1≤20%, wherein m1 is based on a number of graphite particles in the first region, a proportion of graphite particles in the first region with an angle of 0° to 20° between a longest diameter of the graphite particles and a direction of the negative electrode current collector, and n1 is a cross-sectional porosity of the first region.
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Patent Agency Ranking
公开(公告)号：US20220115644A1
公开(公告)日：2022-04-14
申请号：US17265871
申请日：2020-01-02
Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED
Inventor： Jia TANG , Pengyang FENG , Jiali DONG , Yuansen XIE
IPC: H01M4/36 , H01M4/133 , H01M4/1393 , H01M4/525 , H01M4/62
Abstract: An anode including a current collector and an anode active material layer on the current collector are provided. The anode active material layer includes first oriented particles having a first tilt angle θ1 inclined with respect to the direction of the current collector, and second oriented particles having a second tilt angle θ2 inclined with respect to the direction of the current collector. The first tilt angle θ1 and the second tilt angle θ2 are different and both not greater than 70°.
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公开(公告)号：US20210351405A1
公开(公告)日：2021-11-11
申请号：US17281042
申请日：2020-03-11
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Jiali DONG , Jia TANG , Yuansen XIE
Abstract: An anode material having 0.8≤0.06×(Dv50)2−2.5×Dv50+Dv99≤12 (1); and 1.2≤0.2×Dv50−0.006×(Dv50)2+BET≤5 (2), where Dv50 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 50% of the particles, Dv99 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 99% of the particles, and BET is a specific surface area of the anode material, wherein Dv50 and Dv99 are expressed in μm and BET is expressed in m2/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.
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公开(公告)号：US20240290959A1
公开(公告)日：2024-08-29
申请号：US18649030
申请日：2024-04-29
Applicant: Ningde Amperex Technology Limited
Inventor： Jia TANG , Pengyang FENG , Jiali DONG , Yuansen XIE
CPC classification number: H01M4/366 , H01M4/133 , H01M4/1393 , H01M4/525 , H01M4/623 , H01M2004/021 , H01M2004/027 , H01M2004/028
Abstract: An anode including a current collector and an anode active material layer disposed on the current collector are provided. The anode active material layer includes first oriented particles having a first tilt angle θ1 inclined with respect to the direction parallel to the current collector, and second oriented particles having a second tilt angle θ2 inclined with respect to the direction parallel to the current collector. The first tilt angle θ1 and the second tilt angle θ2 are different and both not greater than 70°.
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公开(公告)号：US20240178367A1
公开(公告)日：2024-05-30
申请号：US18522759
申请日：2023-11-29
Applicant: Ningde Amperex Technology Limited
Inventor： Zhilei ZHOU , Pengyang FENG
Abstract: A negative electrode plate includes: a negative electrode current collector; and a negative electrode active material layer that contains negative electrode active substance particles and that is disposed on at least one side of the negative electrode current collector. The negative electrode active material layer includes: a surface layer with an ID1/IG1 value of A, where 0.55≤A≤0.78; and a substrate layer with an ID2/IG2 value of B located between the negative electrode current collector and the surface layer, where 0.78≤B≤0.96. The negative electrode active material layer satisfies: 0.60≤A/B≤1.0.
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公开(公告)号：US20230307638A1
公开(公告)日：2023-09-28
申请号：US18075636
申请日：2022-12-06
Applicant: Ningde Amperex Technology Limited
Inventor： Pengyang FENG , Jiali DONG , Jia TANG , Yuansen XIE
Abstract: An anode material having 0.8≤0.06×(Dv50)2−2.5×Dv50+Dv99≤12 (1); and 1.2≤0.2×Dv50−0.006×(Dv50)2+BET≤5 (2), where Dv50 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 50% of the particles, Dv99 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 99% of the particles, and BET is a specific surface area of the anode material, wherein Dv50 and Dv99 are expressed in μm and BET is expressed in m2/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.
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