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公开(公告)号：US20240332515A1
公开(公告)日：2024-10-03
申请号：US18740459
申请日：2024-06-11
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yan Wen , Yuzhen Zhao , Yingjie Guan , Qisen Huang
CPC classification number: H01M4/366 , H01M4/0471 , H01M4/5825 , H01M4/583 , H01M4/608 , 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 containing the same. The positive electrode active material has a core-shell structure, including a core and a shell cladding the core, wherein the core includes Li1+xMn1−yAyP1−zRzO4, 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 positive electrode active material of the present application enables the secondary battery to have a relatively high energy density, and good rate performance, cycling performance and safety performance.
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公开(公告)号：US20230335723A1
公开(公告)日：2023-10-19
申请号：US18335143
申请日：2023-06-15
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC classification number: H01M4/366 , H01M4/5825 , H01M4/583 , H01M4/622 , H01M4/0471 , H01M4/0404 , H01M2004/028
Abstract: A positive electrode active material and a preparation method therefor, a positive electrode plate containing same, a secondary battery, and a power consuming device are provided. The positive electrode active material has a core-shell structure, comprising an inner core and a shell coating the inner core, wherein the inner core comprises Li1+xMn1−yAyP1−zRzO4, and the shell comprises a first coating layer coating the inner core, and a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The positive electrode active material of the present application enables the secondary battery to have a higher energy density, and a good rate performance, cycling performance and safety performance.
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13.发明授权公开(公告)号：US11710822B2
公开(公告)日：2023-07-25
申请号：US17330400
申请日：2021-05-25
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yuzhen Zhao , Yan Wen , Qisen Huang
CPC classification number: H01M4/366 , C01B32/21 , H01M4/587 , H01M4/60 , H01M4/622 , H01M10/0525 , C01P2002/74 , C01P2004/03 , C01P2004/61 , C01P2006/10 , C01P2006/11 , C01P2006/12 , C01P2006/40 , H01M2004/027
Abstract: The present application discloses a composite graphite material, a secondary battery, an apparatus and a preparation method thereof. The composite graphite material includes a core material and a coating layer coating at least a part of the surface of the core material, the core material including graphite; wherein the absolute value K of zeta potential of the composite graphite material in deionized water with a pH of 7 is at least 20 mV. The use of the composite graphite material provided by the present application can improve the cohesion and bonding force of the negative electrode plate, thereby reducing the cyclic expansion of the secondary battery.
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公开(公告)号：US20240372087A1
公开(公告)日：2024-11-07
申请号：US18772071
申请日：2024-07-12
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yan Wen , Yuzhen Zhao , Yingjie Guan , Qisen Huang
Abstract: The present application provides a positive electrode material composition, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same. The positive electrode material composition includes a positive electrode active material and an organopolysiloxane compound, wherein said positive electrode active material has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn. The positive electrode material composition of the present application enables the secondary battery to have a relatively high energy density, while further improving rate performance, cycling performance and/or high-temperature stability of the secondary battery.
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公开(公告)号：US20240239685A1
公开(公告)日：2024-07-18
申请号：US18584991
申请日：2024-02-22
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC classification number: C01G45/006 , H01M4/366 , H01M4/505 , H01M4/604 , C01P2002/72 , C01P2002/85 , C01P2004/84 , C01P2006/10 , C01P2006/40 , H01M2004/028
Abstract: 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 are provided. The positive electrode active material has a core-shell structure, comprising a core and a cladding layer covering at least a portion of said core, wherein said core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, said cladding layer comprises a polymer containing an electron withdrawing group. 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
公开(公告)号：US11916229B2
公开(公告)日：2024-02-27
申请号：US18335143
申请日：2023-06-15
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC classification number: H01M4/366 , H01M4/0404 , H01M4/0471 , H01M4/583 , H01M4/5825 , H01M4/622 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode active material and a preparation method therefor, a positive electrode plate containing same, a secondary battery, and a power consuming device are provided. The positive electrode active material has a core-shell structure, comprising an inner core and a shell coating the inner core, wherein the inner core comprises Li1+xMn1−yAyP1−zRzO4, and the shell comprises a first coating layer coating the inner core, and a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The positive electrode active material of the present application enables the secondary battery to have a higher energy density, and a good rate performance, cycling performance and safety performance.
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公开(公告)号：US11695112B2
公开(公告)日：2023-07-04
申请号：US17553839
申请日：2021-12-17
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC classification number: H01M4/386 , H01M4/0416 , H01M4/387 , H01M2004/027
Abstract: The present application provides a negative electrode active material, a process for preparing the same, and a secondary battery, a battery module, a battery pack and an apparatus related the same. The negative electrode active material comprises a core material and a polymer-modified coating layer on at least a part of a surface of the core material, the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material, the polymer-modified coating layer comprises sulfur element and carbon element, the sulfur element has a mass percentage of from 0.2% to 4% in the negative electrode active material, the carbon element has a mass percentage of from 0.5% to 4% in the negative electrode active material, and the polymer-modified coating layer comprises a —S—C— bond.
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公开(公告)号：US11420875B2
公开(公告)日：2022-08-23
申请号：US17586725
申请日：2022-01-27
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
Abstract: This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiOx particles and a modified polymer coating layer covering the SiOx particles, in which 0
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公开(公告)号：US11316158B2
公开(公告)日：2022-04-26
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：US20240396025A1
公开(公告)日：2024-11-28
申请号：US18792581
申请日：2024-08-02
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan Ma , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
Abstract: Provided are a positive electrode material composition, a method for the preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same. The positive electrode material composition comprises a positive electrode active material with a core-shell structure and an organopolysiloxane compound, wherein the positive electrode active material comprises a core and a shell covering the core, wherein the core has a chemical formula of Li1+xMn1−yAyP1−zRzO4, and the shell comprises a first cladding layer covering the core, a second cladding layer covering the first cladding layer, and a third cladding layer covering the second cladding layer. The positive electrode material composition of the present application enables the secondary battery to have a relatively high energy density, while further improving cycling performance safety performance and/or rate performance of the secondary battery.
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