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公开(公告)号：US20240304798A1
公开(公告)日：2024-09-12
申请号：US18668268
申请日：2024-05-20
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yan Wen , Yingjie Guan , Yuzhen Zhao , Qisen Huang
CPC classification number: H01M4/366 , H01M4/505 , H01M4/5825 , H01M4/587 , H01M4/602 , H01M2004/028 , H01M2220/20
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 containing the same. The positive electrode active material has a core-shell structure, comprising a core and a shell cladding the core, wherein the core has a chemical formula of Li1+xMn1-yAyP1-zRzO4, the shell comprises a first cladding layer cladding the core, a second cladding layer cladding the first cladding layer, a third cladding layer cladding the second cladding layer and a fourth cladding layer cladding the third cladding layer. The positive electrode active material of the present application enables the secondary battery 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：US11973215B2
公开(公告)日：2024-04-30
申请号：US17059405
申请日：2020-07-14
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
CPC classification number: H01M4/366 , H01M4/0404 , H01M4/0471 , H01M4/386 , H01M4/387 , H01M4/587 , H01M4/625 , H01M2004/021 , H01M2004/027 , H01M2220/20
Abstract: The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core material and a modified polymer coating layer coated on at least a part of the outer surface of the core material, the core material comprises one or more of silicon-based materials and tin based materials, the coating layer comprises carbon element and nitrogen element, wherein the nitrogen element is present in the negative active material in a mass percentage of 0.1%˜0.66%, and the coating layer comprises a —C═N-linkage.
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公开(公告)号：US20230352674A1
公开(公告)日：2023-11-02
申请号：US18347456
申请日：2023-07-05
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
CPC classification number: H01M4/505 , H01M4/622 , H01M4/625 , H01M4/0471 , H01M4/0404 , H01M2004/028
Abstract: The present application provides a positive electrode active material, a preparation method therefor, a positive electrode plate, a secondary battery and a power consuming device containing same. The positive electrode active material has a core-shell structure, including an inner core and a coating layer coating at least a part of the inner core, wherein the inner core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, and the coating layer comprising a polymer which comprises one or more of plant polysaccharide, marine polysaccharide and their respective derivatives. The positive electrode active material of the present application enables a secondary battery to have a high energy density as well as significantly improved rate performance, cycling performance and/or high-temperature stability.
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公开(公告)号：US20210151751A1
公开(公告)日：2021-05-20
申请号：US17159138
申请日：2021-01-26
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yingjie GUAN , Yuzhen Zhao , Yan Wen , Qisen Huang , Xin Liu
Abstract: The present application provide a secondary battery and related battery module, battery pack and apparatus. The secondary battery includes a positive electrode plate, a negative electrode plate, a separator and an electrolyte, wherein the secondary battery includes a positive active material selected from one or more of layered lithium nickel cobalt manganese oxide and layered lithium nickel cobalt aluminum oxide, and a negative active material including graphite and silicon-oxygen compound; the delithiation capacity A of the negative electrode film in the voltage range of 0.005V to the delithiation platform voltage and the delithiation capacity B of the negative electrode film in the voltage range of the delithiation platform voltage to 1.2V satisfy: 1A/B2; and when the secondary battery is discharged to a voltage of 2.5V, the voltage U of the negative electrode plate relative to a lithium metal reference electrode satisfies: 0.5VU0.7V.
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公开(公告)号：US12100834B2
公开(公告)日：2024-09-24
申请号：US18616052
申请日：2024-03-25
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
CPC classification number: H01M4/366 , C01B25/45 , C01B33/32 , H01M4/1315 , H01M4/137 , H01M4/505 , H01M4/604 , H01M4/608 , C01P2002/52 , C01P2002/72 , C01P2002/85 , C01P2006/40 , H01M2004/028
Abstract: A positive electrode active material, a method for preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same are provided. The positive electrode active material has a core-shell structure, comprising a core, a first cladding layer covering the core, a second cladding layer covering the first cladding layer, wherein the core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, the first cladding layer comprises a first polymer containing an electron withdrawing group, the second cladding layer comprises a second polymer, and wherein the second polymer comprises one or more of plant polysaccharides, marine polysaccharides and the derivatives thereof. The positive electrode active material of the present application enables a secondary battery to have a relatively high energy density, while further having a significantly improved rate performance, cycling performance and/or high-temperature stability.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20230420661A1
公开(公告)日：2023-12-28
申请号：US18459375
申请日：2023-08-31
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yuzhen Zhao , Yingjie Guan , Qingyan Ma , Yan Wen , Qisen Huang
IPC: H01M4/36 , H01M4/38 , H01M4/583 , H01M4/04 , H01M10/0569
CPC classification number: H01M4/366 , H01M4/386 , H01M4/583 , H01M4/0471 , H01M10/0569 , H01M2004/027
Abstract: Provided are a negative electrode active material and a preparation method thereof, as well as a secondary battery having the same, and a battery module, a battery pack and an electrical apparatus. The negative electrode active material of the present application comprises: a silicon inner core; a first cladding layer clad on the surface of the silicon inner core, wherein the first cladding layer is a carbon-containing layer; and a second cladding layer clad on the surface of the first cladding layer, wherein the second cladding layer is an elemental sulfur layer. By using the negative electrode active material of the present application, the energy density of the secondary battery can be improved, and the cycle life can be prolonged.
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公开(公告)号：US20230119054A1
公开(公告)日：2023-04-20
申请号：US18051519
申请日：2022-11-01
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
Abstract: The present application provide a silicon-oxygen compound, a secondary battery using it, and related battery modules, battery packs, and devices. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0
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公开(公告)号：US11522181B2
公开(公告)日：2022-12-06
申请号：US17059423
申请日：2020-07-22
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
Abstract: The present application provide a silicon-oxygen compound, a secondary battery using it, and related battery modules, battery packs, and devices. The silicon-oxygen compound provided by the present application has a formula of SiOx, in which x satisfies 0
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公开(公告)号：US20200212439A1
公开(公告)日：2020-07-02
申请号：US16723578
申请日：2019-12-20
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yuqun ZENG , Chengdu Liang , Yuzhen Zhao , Qisen Huang , Yingjie Guan , Yan Wen
Abstract: The present disclosure provides a negative electrode active material, a battery and a device. The negative electrode active material comprises a first silicon oxide and a second silicon oxide, wherein, a ratio of a particle diameter Dn10 of the first silicon oxide to a particle diameter Dn10 of the second silicon oxide is 8˜25, the particle diameter Dn10 of the first silicon oxide is 1.0 μm˜5.0 μm, the particle diameter Dn10 of the second silicon oxide is 0.05 μm˜0.50 μm. By selecting two kinds of silicon oxides with specific ranges of Dn10 to match with each other, the present disclosure controls the thickness rebound of negative electrode plate, ensures good electrical contact between the negative electrode active material particles, in turn is beneficial to improve the cycle stability and the cycle-life of the battery.
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10.发明授权公开(公告)号：US12187614B2
公开(公告)日：2025-01-07
申请号：US17475365
申请日：2021-09-15
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yuzhen Zhao , Yan Wen , Qisen Huang
IPC: C01B32/205 , C01B32/20 , C01B32/21 , H01M4/133 , H01M4/36 , H01M4/62 , H01M10/0525
Abstract: The present application discloses a composite graphite material and a method for preparing the same, a secondary battery, and an apparatus. The composite graphite material includes a core material and a coating layer that coats at least a portion of the surface of the core material, the core material including graphite, and the coating layer including a coating material containing a cyclic structure moiety, wherein the composite graphite material has a weight-loss rate of from 0.1% to 0.55% when the composite graphite material is heated in an atmosphere of an inert non-oxidative gas at a temperature rising from 40° C. to 800° C. The composite graphite material can enhance the gram capability and reduce the expansion rate of an electrode plate, and more preferably, can improve the cycle performance and kinetic performance of a battery as well.
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