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公开(公告)号：US11108051B2
公开(公告)日：2021-08-31
申请号：US15968654
申请日：2018-05-01
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yujun Chen , Xinliang Kuang , Long Wang , Na Liu , Huan Ni
IPC: H01M4/62 , H01M4/36 , H01M4/525 , B01J13/08 , H01M10/0525 , H01M4/505 , H01M4/04 , H01M4/1391 , H01M4/131 , H01M4/02
Abstract: The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.
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公开(公告)号：US10720643B2
公开(公告)日：2020-07-21
申请号：US15877403
申请日：2018-01-23
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xinliang Kuang , Yujun Chen , Long Wang , Na Liu
IPC: H01M4/525 , H01M4/131 , H01M10/0525 , H01M4/02
Abstract: The present invention provides a positive electrode material for a lithium ion battery including a nickel-containing positive electrode material and a coating layer coated on the nickel-containing positive electrode material, wherein the nickel-containing positive electrode material has a chemical formula of LiNixM1-xO2, 0.5≤x≤1, M is at least one of Co, Mn and Al, and the coating layer contains lithium vanadium phosphate and silica. Compared with the prior art, the coating layer containing lithium vanadium phosphate and silica coated on the nickel-containing positive electrode material of the present invention can remarkably improve the dynamic performances and the cycle performances at high voltage of the lithium ion battery. In addition, the present invention also provides a method for preparing the positive electrode material a lithium ion battery containing the positive electrode material.
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公开(公告)号：US11133508B2
公开(公告)日：2021-09-28
申请号：US16374155
申请日：2019-04-03
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yaru Zhou , Qingrui Xue , Zige Zhang , Miao Jiang , Jing Li , Wei Li , Long Wang
Abstract: The present disclosure provides a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer has a main body portion covered by the active material layer and a protrusion portion uncovered by the active material layer. The first protective layer is disposed on a side of the protrusion portion facing away from the insulating layer. The electrode plate further includes a conductive structure, which has a connecting portion fixed on the main body portion, and a first extending portion exceeding an end of the protrusion portion away from the main body portion. The first protective layer is disposed on a side of the connecting portion close to the active material layer along a height direction.
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4.发明申请公开(公告)号：US20190067685A1
公开(公告)日：2019-02-28
申请号：US16047985
申请日：2018-07-27
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Zhongsi Zhu , Ze Zhong , Chengdong Sun , Yi Zheng , Lingyun Feng , Hang Zhou , Long Wang
Abstract: The present disclosure provides a negative electrode slurry, a negative electrode plate and an electrochemical energy storage device. The negative electrode slurry comprises a solvent and a solid component dispersed in the solvent. The solid component comprises a negative electrode active material, a water-soluble binder and a dispersant. The negative electrode active material comprises a carbon-type active material. The dispersant comprises an A dispersant and a B dispersant, the A dispersant is a cellulose-type dispersant, the B dispersant is at least one of poly(acrylic acid)-type dispersant, polyacrylate-type dispersant and polyacrylamide-type dispersant. Under a combined effect of the A dispersant and the B dispersant, they can ensure that the electrochemical energy storage device has excellent dynamic performance, which can prevent lithium (or sodium, magnesium and zinc) from precipitating under condition of rapid and large current charging, meanwhile they can ensure that the electrochemical energy storage device has excellent cycle performance.
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公开(公告)号：US20180145324A1
公开(公告)日：2018-05-24
申请号：US15817304
申请日：2017-11-20
Applicant: Contemporary Amperex Technology Co., Limited
CPC classification number: H01M4/525 , C01D15/04 , C01D15/06 , C01D15/10 , C01G53/42 , C01G53/50 , C01P2002/50 , C01P2002/85 , C01P2004/03 , C01P2004/80 , C01P2006/12 , C01P2006/40 , C01P2006/80 , H01M4/131 , H01M4/1315 , H01M4/136 , H01M4/366 , H01M4/485 , H01M4/505 , H01M4/5825 , H01M10/0525 , H01M2004/028
Abstract: The present invention provides a lithium ion battery and positive electrode material thereof. The positive electrode material includes a high nickel material having a chemical formula of LiNixM1-xO2 and a coating layer, wherein 0.5≤X
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Patent Agency Ranking
公开(公告)号：US11631862B2
公开(公告)日：2023-04-18
申请号：US17543954
申请日：2021-12-07
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yaru Zhou , Qingrui Xue , Zige Zhang , Miao Jiang , Jing Li , Wei Li , Long Wang
IPC: H01M4/66 , H01M4/70 , H01M50/536 , H01M4/02
Abstract: The present disclosure relates to a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.
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公开(公告)号：US11239468B2
公开(公告)日：2022-02-01
申请号：US16375531
申请日：2019-04-04
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yaru Zhou , Qingrui Xue , Zige Zhang , Miao Jiang , Jing Li , Wei Li , Long Wang
IPC: H01M4/66 , H01M4/70 , H01M50/531 , H01M4/02
Abstract: A secondary battery and an electrode plate are provided. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.
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公开(公告)号：US10784508B2
公开(公告)日：2020-09-22
申请号：US15976713
申请日：2018-05-10
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Huan Ni , Yujun Chen , Xinliang Kuang , Xuguang Gao , Long Wang , Na Liu
IPC: H01M4/36 , C01B25/36 , C01G53/00 , H01M4/62 , H01M4/505 , H01M10/0525 , H01M4/525 , H01M10/052 , H01M4/04 , H01M4/1391 , H01M4/131 , H01M4/02
Abstract: The present disclosure provides a preparation method of a modified positive electrode active material preparation method, which comprising steps of: dispersing a positive electrode active material matrix into an alcohol solvent to form a positive electrode active material matrix suspension; dissolving an alcohol-soluble aluminum salt in an alcohol solvent to form an alcohol-soluble aluminum salt solution; dissolving an alcohol-soluble phosphorous compound in an alcohol solvent to form an alcohol-soluble phosphorous compound solution; mixing the alcohol-soluble aluminum salt solution and the alcohol-soluble phosphorous compound solution and heating to react, obtaining a liquid-phase coating solution which contains aluminum phosphate after the reaction is finished; mixing and stirring the positive electrode active material matrix suspension and the liquid-phase coating solution which contains aluminum phosphate, extraction filtrating and obtaining a filter cake after the stirring is finished, then drying and baking the filter cake, finally obtaining a modified positive electrode active material.
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公开(公告)号：US10290865B2
公开(公告)日：2019-05-14
申请号：US15704687
申请日：2017-09-14
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Qifeng Li , Dingshan Ruan , Wei Liang , Na Liu , Long Wang
IPC: H01M4/02 , H01M4/36 , H01M4/131 , H01M4/525 , H01M4/505 , H01M4/48 , H01M4/04 , C01G53/00 , H01M4/62 , H01M10/0525
Abstract: The present application relates to the technical field of Li-ion battery and, more particularly, to a positive electrode material for a Li-ion battery, a method for preparing the same, and a Li-ion battery containing the same. The positive electrode material for a Li-ion battery includes a substrate material and a coating layer coated on a surface of the substrate material, wherein the coating layer includes boron, a chemical formula of the substrate material is LixNiaCobMncO2, wherein 0.99
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10.发明申请公开(公告)号：US20180212242A1
公开(公告)日：2018-07-26
申请号：US15877403
申请日：2018-01-23
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xinliang Kuang , Yujun Chen , Long Wang , Na Liu
IPC: H01M4/525 , H01M10/0525 , H01M4/131 , H01M4/02
Abstract: The present invention provides a positive electrode material for a lithium ion battery including a nickel-containing positive electrode material and a coating layer coated on the nickel-containing positive electrode material, wherein the nickel-containing positive electrode material has a chemical formula of LiNixM1-xO2, 0.5≤x≤1, M is at least one of Co, Mn and Al, and the coating layer contains lithium vanadium phosphate and silica. Compared with the prior art, the coating layer containing lithium vanadium phosphate and silica coated on the nickel-containing positive electrode material of the present invention can remarkably improve the dynamic performances and the cycle performances at high voltage of the lithium ion battery. In addition, the present invention also provides a method for preparing the positive electrode material a lithium ion battery containing the positive electrode material.
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