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公开(公告)号：US20240178385A1
公开(公告)日：2024-05-30
申请号：US18435387
申请日：2024-02-07
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Rui Du , Yongchao Liu , Sihui Wang , Deyu Zhao , Na Liu
IPC: H01M4/525 , H01M4/02 , H01M4/485 , H01M4/505 , H01M10/0525
CPC classification number: H01M4/525 , H01M4/485 , H01M4/505 , H01M10/0525 , H01M2004/021 , H01M2004/028
Abstract: The present application relates to the electrochemical field, and in particular, to a positive electrode material, and an electrochemical energy storage apparatus having thereof. The present application provides a positive electrode material, including a substrate. The substrate includes secondary particles containing primary particles. A surface of the substrate is coated with an oxide coating layer. The oxide coating layer comprises a coating element, and the coating element is selected from one or more of Al, Ba, Zn, Ti, Zr, Mg, W, Y, Si, Sn, B, Co, or P. The electrochemical energy storage apparatus comprises the foregoing positive electrode material.
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42.发明公开公开(公告)号：US20230299276A1
公开(公告)日：2023-09-21
申请号：US18323423
申请日：2023-05-25
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Dong Zhao , Qi Wu , Qiang Chen , Jingpeng Fan , Jing Wang , Na Liu
CPC classification number: H01M4/366 , H01M4/5825 , H01M4/587 , H01M4/0471 , H01M2004/028
Abstract: A positive electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode active material in the present invention includes: a core, where the core is a lithium-containing phosphate; a first coating layer disposed on at least part of surface of the core, where the first coating layer is a carbon coating layer co-doped with titanium and nitrogen; and a second coating layer disposed on at least part of surface of the first coating layer, where the second coating layer includes Li1+xMxTi2−x(PO4)3, where M is at least one element selected from aluminum, lanthanum, indium, zirconium, gallium, and scandium, and 0.2≤x≤0.8. With use of the positive electrode active material of the present invention, a high discharge capacity, excellent rate performance, and excellent cycling performance can be achieved.
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公开(公告)号：US20230282821A1
公开(公告)日：2023-09-07
申请号：US18315511
申请日：2023-05-11
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Zhenguo Zhang , Jingpeng Fan , Xingkai Hu , Sihui Wang , Qiang Chen , Na Liu
CPC classification number: H01M4/505 , H01M4/525 , H01M4/131 , C01G53/54 , H01M2004/021
Abstract: A spinel-type nickel-manganese-lithium-containing composite oxide, a preparation method thereof, and a secondary battery and an electric apparatus containing the same are provided. A body material of the spinel-type nickel-manganese-lithium-containing composite oxide is represented by a general formula LixNiyMnzMmO4Qq, and both element P and one or more elements selected from elements Nb, W, and Sb are doped in the body material, where based on mass of the spinel-type nickel-manganese-lithium-containing composite oxide, doping content k of the element P satisfies 0.48 wt %≤k≤3.05 wt %, doping content g of the one or more elements selected from the elements Nb, W, and Sb satisfies 0.05 wt %≤g≤0.31 wt %, and 2≤k/g≤20. The secondary battery provided in this application has good high-temperature storage performance and high-temperature cycling performance.
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公开(公告)号：US11721804B2
公开(公告)日：2023-08-08
申请号：US17938930
申请日：2022-09-06
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Hongyu Liu , Changfeng Bie , Xue Leng , Na Liu
CPC classification number: H01M4/366 , C01B25/45 , H01M4/133 , H01M4/136 , H01M4/587 , H01M4/5825 , H01M10/0525 , C01P2002/54 , C01P2004/04 , C01P2004/61 , C01P2004/62 , C01P2004/80 , C01P2006/11 , C01P2006/12 , C01P2006/40 , H01M2004/021 , H01M2004/028 , H01M2220/20
Abstract: A positive active material made of carbon-coated lithium iron phosphate includes a lithium iron phosphate substrate, and a carbon coating layer on a surface of the substrate. The lithium iron phosphate substrate has a general structural formula LiFe1-aMaPO4, where M is at least one selected from Cu, Mn, Cr, Zn, Pb, Ca, Co, Ni, Sr, Nb, or Ti, and 0≤a≤0.01. A carbon coating factor of the carbon-coated lithium iron phosphate,
η
=
BET
1
BET
2
,
satisfies 0.81≤η≤0.95, where BET1 denotes a specific surface area of mesopore and macropore structures in the carbon-coated lithium iron phosphate, and BET2 denotes a total specific surface area of the carbon-coated lithium iron phosphate.-
公开(公告)号：US11699789B2
公开(公告)日：2023-07-11
申请号：US17418401
申请日：2019-12-27
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Rui Du , Yongchao Liu , Chongheng Shen , Sihui Wang , Na Liu
CPC classification number: H01M4/525 , C01G53/50 , H01M4/366 , H01M4/505 , H01M10/0525 , C01P2002/54 , C01P2004/51 , C01P2004/61 , C01P2006/12 , C01P2006/40 , H01M2004/021 , H01M2004/028
Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm, or LixNiyCozMkMepOrAm with a coating layer on its surface; and the positive active material is single crystal or quasi-single crystal particles, and a particle size Dn10 of the positive active material satisfies: 0.3 μm≤Dn10≤2 μm. In this application, particle morphology of the positive active material and an amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte solution, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating an energy density, cycle performance, and rate performance of the electrochemical energy storage apparatus.
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Patent Agency Ranking
公开(公告)号：US11569510B2
公开(公告)日：2023-01-31
申请号：US17518744
申请日：2021-11-04
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Rui Du , Sihui Wang , Yongchao Liu , Chi Luo , Deyu Zhao , Na Liu
Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCozMkMepOrAm, where 0.95≤x≤1.05, 0.50≤y≤0.95, 0≤z≤0.2, 0≤k≤0.4, 0≤p≤0.05, 1≤r≤2, 0≤m≤2, m+r≤2; a coating layer is disposed on the subs hate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w≤0.7.
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公开(公告)号：US20220399540A1
公开(公告)日：2022-12-15
申请号：US17873861
申请日：2022-07-26
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Bangrun WANG , Na Liu
IPC: H01M4/36 , H01M4/505 , H01M4/58 , H01M4/525 , H01M10/0525
Abstract: This application provides a composite positive electrode material and a preparation method thereof, a secondary battery, a battery group including the secondary battery, and an electric apparatus including the secondary battery. The composite positive electrode material includes a lithium-rich metal oxide and a positive electrode active material covering at least a partial surface of the lithium-rich metal oxide, where the positive electrode active material is formed through in-situ reaction between a positive electrode active material precursor and a free lithium compound on the surface of the lithium-rich metal oxide.
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公开(公告)号：US11121367B2
公开(公告)日：2021-09-14
申请号：US15577290
申请日：2017-08-24
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Rui Du , Na Liu , Yongchao Liu , Sihui Wang , Zhongling Xu , Chao Yang
IPC: H01M4/505 , H01M4/525 , H01M4/04 , H01M4/58 , H01M4/485 , H01M4/36 , H01M4/139 , H01M10/052 , H01M10/0525 , H01M4/50 , H01M4/62 , H01M4/02
Abstract: The disclosure provides a modified positive electrode active material, a preparation method thereof, and an electrochemical energy storage device. The modified positive electrode active material comprises positive electrode active material substrate; first oxide layer, coated on the surface of the positive electrode active material substrate and selected from one or more of oxides of element M being selected from the group of one or more of Li, Al, Zr, Mg, Ti, Y, Si, Ca, Cr, Fe, Zn, Nb, Sn, Ba, and Cd; and second oxide layer having a continuous layered structure, coated on the surface of the first oxide layer and selected from one or more of oxides of element M′ being selected from one or more of Li, B, P, As, Pb, V, Mo, and Sn. High temperature storage performance and cycling performance of electrochemical energy storage device are improved by the modified positive electrode active material.
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公开(公告)号：US11121362B2
公开(公告)日：2021-09-14
申请号：US17123544
申请日：2020-12-16
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xue Leng , Rui Du , Na Liu , Yongchao Liu , Huan Ni
IPC: H01M4/36 , H01M10/0525 , H01M4/1315 , H01M4/505 , H01M4/525 , C30B29/22 , H01M4/02
Abstract: The present application provides a positive electrode sheet for a secondary battery, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer on a surface of the positive electrode current collector, the positive electrode active material layer includes a positive electrode active material, the positive electrode active material includes a first lithium nickel transition metal oxide and a second lithium nickel transition metal oxide, the first lithium nickel transition metal oxide includes a first substrate and a first coating layer on a surface of the first substrate, the first substrate is secondary particles, and the second lithium nickel transition metal oxide is a single crystal or single-crystal-like morphological particles.
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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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