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1.发明公开
公开(公告)号：EP4203106A1
公开(公告)日：2023-06-28
申请号：EP21871122.4
申请日：2021-08-11
发明人： LENG, Xue , DU, Rui , LIU, Na , LIU, Yongchao , NI, Huan
摘要： The present application relates to the field of electrochemistry, and in particular to a positive electrode sheet for a secondary battery, a secondary battery, a battery module, a battery pack and a device. The present application provides a positive electrode sheet for a secondary battery. The positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer located on the surface of the positive electrode current collector; the positive electrode active material layer comprises positive electrode active materials, the positive electrode active materials comprise a first lithium nickel transition metal oxide and a second lithium nickel transition metal oxide, the first lithium nickel transition metal oxide comprises a first substrate and a first coating layer located on the surface of the first substrate, the first substrate is secondary particles, and the second lithium nickel transition metal oxide is particles having monocrystalline or monocrystalline-like morphology. In the positive electrode sheet provided by the present application, by adjusting and controlling the particle size distribution of the positive electrode active materials after mixing and an OI value of the electrode sheet, the compressive strength of positive electrode active material particles in the positive electrode sheet is increased, and the problem of particle cracking of the positive electrode active material particles is effectively restrained.
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公开(公告)号：EP4167314A1
公开(公告)日：2023-04-19
申请号：EP21927078.2
申请日：2021-08-23
发明人： LIU, Hongyu , BIE, Changfeng , LENG, Xue , LIU, Na
摘要： This application provides a carbon-coated lithium iron phosphate positive active material. The carbon-coated lithium iron phosphate positive active material according to this application is obtained by adjusting a relative percentage of a specific surface area of carbon structures of each different micromorphology in a superficial layer of a carbon-coated lithium iron phosphate material. The carbon-coated lithium iron phosphate positive active material according to this application possesses a carbon coating factor η. When η satisfies 0.81 ≤ η ≤ 0.95, the lithium iron phosphate positive active material contains a high-quality carbon coating, thereby helping to exert the capacity of the lithium iron phosphate positive active material, and improving dehydration efficiency of an electrode plate significantly. A lithium-ion battery prepared from such a material is excellent in energy density, cycle performance, and processability concurrently.
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公开(公告)号：EP3930051A1
公开(公告)日：2021-12-29
申请号：EP20832963.1
申请日：2020-04-11
发明人： SHEN, Chongheng , DU, Rui , LIU, Yongchao , ZHAO, Deyu , LIU, Na
摘要： This disclosure relates to the electrochemical field, and in particular, to a positive electrode material and a preparation method and usage thereof. The positive electrode material of this disclosure includes a substrate, where a general formula of the substrate is Li x Ni y Co z M k Me p O r A m , where 0.95≤x≤1.05, 0.5≤y≤1, 0≤z≤1, 0≤k≤1, 0≤p≤0.1, 1≤r≤5.2, 0≤m≤2, m+r≤2, M is selected from one or more of Mn and Al, Me is selected from one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, and Nb, and A is selected from one or more of N, F, S, and Cl; and an oxygen defect level of the positive electrode material satisfies at least one of condition (1) or condition (2): (1) 1.77 ≤ OD1 ≤ 1.90; or (2) 0.69 ≤ OD2 ≤ 0.74.
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公开(公告)号：EP3404743A1
公开(公告)日：2018-11-21
申请号：EP18172241.4
申请日：2018-05-15
发明人： NI, Huan , CHEN, Yujun , KUANG, Xinliang , GAO, Xuguang , WANG, Long , LIU, Na
IPC分类号： H01M4/04 , H01M4/131 , H01M4/1391 , H01M4/36 , H01M4/505 , H01M4/525 , H01M10/052 , H01M4/02
CPC分类号： H01M4/366 , C01B25/36 , C01G53/42 , C01G53/50 , C01P2004/03 , C01P2004/80 , C01P2006/40 , H01M4/0471 , H01M4/131 , H01M4/1391 , H01M4/505 , H01M4/525 , H01M4/628 , H01M10/052 , H01M10/0525 , H01M2004/028 , H01M2220/20
摘要： The present invention 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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5.发明公开
公开(公告)号：EP4322259A1
公开(公告)日：2024-02-14
申请号：EP22930149.4
申请日：2022-06-16
发明人： ZHAO, Dong , WU, Qi , FAN, Jingpeng , CHEN, Qiang , WANG, Jing , LIU, Na
IPC分类号： H01M4/505 , H01M4/62 , H01M10/0525
摘要： This application provides a positive electrode material and a manufacturing method thereof, and a secondary battery having the positive electrode material. The positive electrode material includes a core, where the core includes a lithium-rich manganese-based positive electrode material; and a coating layer, where the coating layer envelops outer surface of the core and includes a composite material of a transition metal oxoacid salt and carbon, where the transition metal in the transition metal oxoacid salt is selected from at least one of Ti, Mo, W, V, Ta, Nb or Nd and the composite material has a mesh structure. The secondary battery prepared using the positive electrode material according to this application exhibits characteristics of high energy density, initial charge-discharge efficiency, cycling performance, and rate performance.
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公开(公告)号：EP4322246A1
公开(公告)日：2024-02-14
申请号：EP22930136.1
申请日：2022-06-17
发明人： WANG, Jing , CHEN, Qiang , WU, Qi , ZHAO, Dong , FAN, Jingpeng , LIU, Na
IPC分类号： H01M4/131 , H01M4/1391 , H01M10/0525
摘要： The present application provides a modified positive electrode material and a preparation method thereof, as well as a positive electrode plate, a secondary battery, a battery module, a battery pack and an electrical apparatus. The modified positive electrode material includes an inner core and a cladding layer, the inner core is a positive electrode material, the cladding layer includes a polymer electrolyte body and a ferroelectric ceramic material dispersed in the polymer electrolyte body. The polymer electrolyte body forms a film-like cladding layer on the outer layer of the positive electrode material particles, which reduces the side reaction between the surface layer of the positive electrode material and the electrolyte solution, and improves storage performance; secondly, the flexible cladding layer formed by the polymer electrolyte body can inhibit the shrinkage and expansion of the positive electrode material during charging and discharging to a certain extent, thereby reducing cracking/chalking of the positive electrode material; also, the composite cladding layer has high ionic conductivity, which provides more channels for ion transport and improves the rate performance of the synthesized positive electrode material. Therefore, the above-mentioned modified positive electrode material has better structural stability, as well as improved rate performance, material storage and cycling performance.
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公开(公告)号：EP4138158A1
公开(公告)日：2023-02-22
申请号：EP21916635.2
申请日：2021-06-11
发明人： WANG, Bangrun , LIU, Na
IPC分类号： H01M4/36
摘要： 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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8.发明公开
公开(公告)号：EP4109658A1
公开(公告)日：2022-12-28
申请号：EP20963115.9
申请日：2020-11-30
发明人： HONG, Haiyi , CHENG, Cong , LAN, Yuanyuan , YANG, Jianrui , LIU, Na , JIN, Haizu
IPC分类号： H01M50/409 , H01M50/40 , H01M50/431 , H01M50/446
摘要： The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles; the first organic particles and the second organic particles are embedded in the inorganic particles and forme protrusions on the surface of the coating; the first organic particles have a number-average particle size of > 10 µm, and the second organic particles have a number-average particle size of 2 µm-10 µm. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.
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公开(公告)号：EP4089823A1
公开(公告)日：2022-11-16
申请号：EP20946634.1
申请日：2020-09-25
发明人： GUO, Yongsheng , TIAN, Jiarui , CHENG, Cong , LIU, Na , OUYANG, Chuying , LAN, Yuanyuan , SU, Shuojian
IPC分类号： H01M50/451
摘要： This application provides a separator, an electrical apparatus including the separator, and preparation methods thereof. The separator includes a coating layer containing an organic-inorganic hybrid composite compound and provides improved performance in a number of aspects, and the organic-inorganic hybrid composite compound is formed by periodically assembling, along at least one spatial direction, basic units expressed by formula I. This application further provides a battery and electrical device containing such separator, preparation methods thereof, organic-inorganic hybrid composite compound for improving performance of a separator.
Lx(MaCb)y•Az formula I-
公开(公告)号：EP4075587A1
公开(公告)日：2022-10-19
申请号：EP20947350.3
申请日：2020-09-25
发明人： GUO, Yongsheng , TIAN, Jiarui , CHENG, Cong , LIU, Na , OUYANG, Chuying , LAN, Yuanyuan , SU, Shuojian
IPC分类号： H01M50/40 , H01M50/409 , H01M50/446
摘要： This application provides a separator, an electrical apparatus containing such separator, and preparation methods thereof. The separator includes a coating layer containing an organic-inorganic hybrid composite compound and provides improved performance in a number of aspects, and the organic-inorganic hybrid composite compound is formed by periodically assembling, along at least one spatial direction, basic units expressed by formula I. This application further provides a battery and electrical device containing such separator, preparation methods thereof, organic-inorganic hybrid composite compound for improving performance of a separator.
L x (M a C b ) y •A z formula I
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