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1.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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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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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：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：US20220231279A1
公开(公告)日：2022-07-21
申请号：US17586754
申请日：2022-01-27
Applicant: Contemporary Amperex Technology Co.,Limited
Inventor： Chengdu LIANG , Yuzhen ZHAO , Yingjie GUAN , Yan Wen , Qisen HUANG
Abstract: The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900 cm−1˜960 cm−1, 1300 cm−1˜1380 cm−1 and 1520 cm−1˜1590 cm−1, respectively, in which the scattering peak at the Raman shift of 900 cm−1˜960 cm−1 has a peak intensity recorded as Il, the scattering peak at the Raman shift of 1520 cm−1˜1590 cm−1 has a peak intensity recorded as IG, and Il and IG satisfy 0.2≤Il/IG≤0.8.
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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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