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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
发明人： Qingyan Ma , Yan Wen , Yuzhen Zhao , Yingjie Guan , Qisen Huang
CPC分类号： H01M4/366 , H01M4/0471 , H01M4/5825 , H01M4/583 , H01M4/608 , H01M2004/021 , H01M2004/028
摘要： 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
发明人： Qingyan Ma , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC分类号： H01M4/366 , H01M4/5825 , H01M4/583 , H01M4/622 , H01M4/0471 , H01M4/0404 , H01M2004/028
摘要： 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
发明人： Chengdu Liang , Yuzhen Zhao , Yan Wen , Qisen Huang
CPC分类号： 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
摘要： 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：US20240266516A1
公开(公告)日：2024-08-08
申请号：US18616052
申请日：2024-03-25
发明人： Qingyan Ma , Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang
CPC分类号： 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
摘要： 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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公开(公告)号：US11996548B2
公开(公告)日：2024-05-28
申请号：US16973152
申请日：2020-07-14
发明人： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC分类号： H01M4/366 , H01M4/483 , H01M4/62 , H01M2004/021 , H01M2004/027
摘要： 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：US11855289B2
公开(公告)日：2023-12-26
申请号：US17563071
申请日：2021-12-28
发明人： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
IPC分类号： H01M4/62 , H01M4/04 , H01M4/36 , H01M10/0525 , H01M4/02
CPC分类号： H01M4/62 , H01M4/0402 , H01M4/364 , H01M10/0525 , H01M2004/021 , H01M2004/027
摘要： The present application provides a negative electrode active material, a process, a battery, a battery module, a battery pack and an apparatus related to the same. The negative electrode active material comprises a core material and a polymer modified coating on at least a part of a surface of core material; wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; the negative electrode active material has a weight loss rate satisfying 0.2%≤weight loss rate≤2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere. The present application can reduce damage to the surface structure of the negative electrode active material, reduce loss of active ions and capacity, meanwhile can well improve coulomb efficiency and cycle performance of the battery.
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公开(公告)号：US11476457B2
公开(公告)日：2022-10-18
申请号：US17586754
申请日：2022-01-27
发明人： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
摘要： 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：US20240239685A1
公开(公告)日：2024-07-18
申请号：US18584991
申请日：2024-02-22
发明人： Qingyan Ma , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC分类号： C01G45/006 , H01M4/366 , H01M4/505 , H01M4/604 , C01P2002/72 , C01P2002/85 , C01P2004/84 , C01P2006/10 , C01P2006/40 , H01M2004/028
摘要： 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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公开(公告)号：US11916229B2
公开(公告)日：2024-02-27
申请号：US18335143
申请日：2023-06-15
发明人： Qingyan Ma , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC分类号： H01M4/366 , H01M4/0404 , H01M4/0471 , H01M4/583 , H01M4/5825 , H01M4/622 , H01M2004/021 , H01M2004/028
摘要： 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
发明人： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
CPC分类号： H01M4/386 , H01M4/0416 , H01M4/387 , H01M2004/027
摘要： 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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