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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: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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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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