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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：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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3.发明公开公开(公告)号：US20230207782A1
公开(公告)日：2023-06-29
申请号：US18109812
申请日：2023-02-14
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yingjie GUAN , Yongchao LIU , Qisen HUANG , Na LIU , Chengdu LIANG
CPC classification number: H01M4/364 , H01M4/525 , H01M4/505 , H01M4/485 , H01M4/0471 , H01M4/621 , H01M2004/021
Abstract: This application relates to an electrode active composition, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active composition includes: a first component, the first component being lithium cobalt oxide particles; and a second component, the second component being ternary material particles. The first component includes lithium cobalt oxide particles with a particle size greater than 11 μm and lithium cobalt oxide particles with a particle size less than 6 μm, and a ratio in number of the lithium cobalt oxide particles with a particle size greater than 11 μm to the lithium cobalt oxide particles with a particle size less than 6 μm is 0.2-4.8, and in some embodiments, 0.2-2.8. A summed number of the lithium cobalt oxide particles with a particle size greater than 11 μm and the lithium cobalt oxide particles with a particle size less than 6 μm accounts for above 90% of a total number of particles in the first component.
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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：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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Patent Agency Ranking
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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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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