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公开(公告)号：US20220140318A1
公开(公告)日：2022-05-05
申请号：US16973152
申请日：2020-07-14
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, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core structure and a modified polymer coating layer coated on at least a part of the outer surface of the core structure, wherein the core structure comprises one or more of silicon-based materials and tin based materials; and wherein the negative active material has an infrared spectrum comprising an infrared absorption peak at the wavelength of 1450 cm−1 to 1690 cm−1, and the infrared absorption peak has a transmittance T that satisfies 80%≤T≤99%.
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公开(公告)号：US20220144648A1
公开(公告)日：2022-05-12
申请号：US17584304
申请日：2022-01-25
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu LIANG , Yingjie GUAN , Yuzhen ZHAO , Yan WEN , Qisen HUANG
IPC: C01B33/113 , H01M4/505 , H01M10/0525 , H01M4/36
Abstract: The present application discloses a silicon-oxygen compound, a method for preparation thereof, and a secondary battery, a battery module, a battery pack and an apparatus related thereto. The silicon-oxygen compound includes both manganese element and a copper element, a content of the manganese element is from 20 ppm to 500 ppm, and a mass ratio of the manganese element to the copper element is from 1 to 18.
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公开(公告)号：US20210280857A1
公开(公告)日：2021-09-09
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
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：US20230343938A1
公开(公告)日：2023-10-26
申请号：US18342731
申请日：2023-06-27
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan MA , Yuzhen ZHAO , Yingjie GUAN , Yan WEN , Qisen HUANG
CPC classification number: H01M4/366 , H01M4/587 , H01M4/5825 , H01M4/621 , H01M4/133 , H01M4/136 , C01B25/45 , H01M2004/028
Abstract: A positive electrode active material has a core-shell structure, which includes an inner core and a coating layer coating at least part of the inner core. The inner core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, and the coating layer includes a polymer which includes one or more selected from polysiloxanes with linear structure and polysiloxanes with ring structure.
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公开(公告)号：US20230327091A1
公开(公告)日：2023-10-12
申请号：US18337127
申请日：2023-06-19
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qingyan MA , Yingjie GUAN , Yuzhen ZHAO , Yan WEN , Qisen HUANG
CPC classification number: H01M4/366 , H01M4/5825 , C01B25/45 , C01P2002/52 , C01P2006/40 , C01P2004/84
Abstract: A positive electrode active material has a core-shell structure including an inner core and a shell coating the inner core. The inner core has a chemical formula of Li1+xMn1−yAyP1−zRzO4. The shell includes a first coating layer coating the inner core, a second coating layer coating the first coating layer, a third coating layer coating the second coating layer, and a fourth coating layer coating the third coating layer.
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Patent Agency Ranking
公开(公告)号：US20210175499A1
公开(公告)日：2021-06-10
申请号：US17140088
申请日：2021-01-03
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu LIANG , Yingjie GUAN , Yuzhen ZHAO , Yan WEN , Qisen HUANG
IPC: H01M4/48 , H01M4/04 , H01M10/0525 , H01M4/38 , H01M4/36
Abstract: The present application provide a silicon-oxygen compound, a preparation method thereof and related secondary battery, battery module, battery pack, and device. 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：US20230146274A1
公开(公告)日：2023-05-11
申请号：US17888497
申请日：2022-08-16
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yingjie GUAN , Yuzhen ZHAO , Qingyan MA , Yan WEN , Qisen HUANG , Fenggang ZHAO
CPC classification number: H01M4/364 , H01M4/386 , H01M4/587 , H01M4/622 , H01M2004/027
Abstract: The present application provides a silicon carbon negative electrode material, a negative electrode sheet including the same, a secondary battery, a battery module, a battery pack and a power consumption apparatus. A battery composed of a negative electrode prepared by the silicon carbon negative electrode material in the present application as a working electrode, metal lithium as a counter electrode and an electrolyte containing a lithium ion conductive substance may be charged and discharged, and in a case of drawing a relationship graph between a differential value dQ/dV obtained by differentiating a charging and discharging capacity Q by a working electrode potential V and the working electrode potential V, when energizing the negative electrode material in a direction of delithiation, a ratio of a maximum Y of dQ/dV between 400-480 mV to a maximum X of dQ/dV between 200-255 mV may be in a range of 3.5 to 15.
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公开(公告)号：US20220344649A1
公开(公告)日：2022-10-27
申请号：US17862131
申请日：2022-07-11
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO, LIMITED
Inventor： Xin LIU , Qisen HUANG , Cheng LI , Yingjie GUAN , Yan WEN , Xianghui LIU
Abstract: This application provides a silicon-based material, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an apparatus associated therewith. The silicon-based material includes a core structure and a coating layer provided on at least partial surface of the core structure, where the core structure includes both a silicon phase and a lithium metasilicate phase, and a particle size P of the lithium metasilicate phase is ≥30 nm. The silicon-based material of this application can not only increase energy density of a secondary battery with the silicon phase, but also improve structural stability and chemical stability of the silicon-based material, so that the secondary battery can deliver satisfactory and balanced cycling performance and first-cycle coulombic efficiency in overall.
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公开(公告)号：US20220140319A1
公开(公告)日：2022-05-05
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
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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10.发明公开公开(公告)号：US20230163284A1
公开(公告)日：2023-05-25
申请号：US18095582
申请日：2023-01-11
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yingjie GUAN , Yuzhen ZHAO , Qingyan MA , Yan WEN , Qisen HUANG , Fenggang ZHAO
IPC: H01M4/38 , H01M4/485 , H01M4/36 , H01M4/04 , H01M10/0525
CPC classification number: H01M4/386 , H01M4/485 , H01M4/366 , H01M4/0471 , H01M10/0525 , H01M2004/021
Abstract: This application provides a modified silicon material with a core-shell structure, a method for preparing a modified silicon material, a negative electrode active material, a negative electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The modified silicon material with a core-shell structure includes an inner core, a first coating layer that wraps the inner core, and a second coating layer that wraps the first coating layer, where the inner core is elemental silicon and/or a silicon alloy; the first coating layer includes a silicon-oxygen compound; the second coating layer includes lithium fluoride, lithium carbonate, and carbon; and a weight ratio of element lithium to element carbon in the modified silicon material is 6% to 52%. The modified silicon material of this application has high gram capacity and sound conductivity, so that a battery has high first-cycle coulombic efficiency and sound cycling performance.
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