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1.发明公开
公开(公告)号：EP4394931A1
公开(公告)日：2024-07-03
申请号：EP23845635.4
申请日：2023-07-27
发明人： WANG, Qin
IPC分类号： H01M4/36
CPC分类号： Y02E60/10
摘要： The present disclosure provides a sodium battery cathode electrode material, which has a chemical formula as follows:xNaMBO3.yNa2Ti3O7.zNa3V2(BO3)3/C, wherein the mole number ratio of x to y to z is 0.94-0.96:0.02-0.03:0.02-0.03; M is Fe and Mn, and the mole number ratio of Fe to Mn is 8-9:1-2; and the mass fraction of carbon in the sodium battery cathode electrode material is 1.2% to 1.5%. The sodium battery cathode electrode material provided by the present disclosure is high in capacity, high in voltage platform, stable in structure and high in cycle performance, and the preparation method is simple, low in cost and short in process flow.
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公开(公告)号：EP4187648A1
公开(公告)日：2023-05-31
申请号：EP22814274.1
申请日：2022-07-08
发明人： YANG, Jiaojiao , WANG, Qin , CHENG, Guozhang , GAO, Chuan , ZHAO, Xu , YU, Suixi
IPC分类号： H01M4/58 , C01B25/45 , H01M10/0525
摘要： A high-rate lithium iron phosphate positive electrode material and a production method thereof, comprising first, weighing an iron source and a lithium source in a molar ratio of 1:1-1:1.05, then weighing 5-15% of carbon source and 0-1% of metal ion doping agent based on the total mass of the iron source and lithium source, adding water to the above weighed materials, ball milling and sand grinding the obtained slurry, so that the D50 after the sand grinding is controlled to be 100-200 nm, then spraying the mixture to obtain a precursor, putting the precursor into a sintering furnace for sintering at 650-700 °C under the protection of nitrogen gas, cooling to obtain a sintered material, then pulverizing the sintered material, sieving the pulverized material and removing iron to obtain the lithium iron phosphate. The prepared lithium iron phosphate has a good rate capability and a good cycle stability, wherein 0.1 C discharge capacity thereof reaches 160mAh/g, and 10 C discharge capacity thereof reaches 140mAh/g. The microscopic morphology of the positive electrode material is a spherical-like particle, wherein the primary particle thereof has a mean value of 100 nm.
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公开(公告)号：EP4446282A1
公开(公告)日：2024-10-16
申请号：EP24160438.8
申请日：2024-02-29
发明人： Wang, Qin
IPC分类号： C01B33/32 , H01M10/054 , H01M4/36 , H01M4/58 , H01M4/62
摘要： The present invention relates to the technical field of sodium batteries, and in particular provides a cathode material for sodium batteries and a preparation method thereof. The cathode material for sodium batteries according to the present invention is carbon layer-coated sodium iron manganese titanium silicate, where the sodium iron manganese titanium silicate has a molecular formula of Na q Fe x Mn y (TiO 2 ) z (SiO 4 ) m , where 1.5≤q≤52.5, 0.7≤x≤0.8, 0.2≤y≤0.3, 0.07≤z≤0.5, and 0.5≤m≤1.5. Compared with the prior art, the cathode material for sodium batteries provided by the present invention improves the capacity of resultant batteries by doping with titanium and manganese as well as carbon coating
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公开(公告)号：EP4407710A1
公开(公告)日：2024-07-31
申请号：EP22913837.5
申请日：2022-11-11
发明人： CAO, Minglei , WANG, Qin , YANG, Jiaojiao
IPC分类号： H01M4/36
摘要： The present disclosure relates to a cathode material for a lithium ion battery, and a preparation method therefor. The cathode material is a Ti3C2 MXene-coated lithium manganese iron phosphate material, Ti3C2 MXene being uniformly coated on surfaces of lithium manganese iron phosphate nanoparticles and forming an electrically conductive mesh. The preparation method therefor comprises: adding a phosphorus source and a lithium source to a deionized water/PEG solution, to form a suspension A; adding a manganese source, an iron source, an antioxidant, and Ti3C2 MXene to deionized water to form a suspension B; adding the suspension B to the suspension A dropwise under continuous stirring, to form a mixed solution; then transferring the mixed solution to a hydrothermal reactor to maintain temperature; and after reaction is complete, centrifugally separating a product, and then performing washing, drying, and annealing to obtain the material. In the present disclosure, Ti3C2 MXene is used to coat the surface of the lithium manganese iron phosphate material, effectively improving the ion and electron transmission capacity and structural stability of the lithium manganese iron phosphate material; making it quite suitable for use as a high-energy and high-power-density cathode material for a lithium ion battery.
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5.发明公开
公开(公告)号：EP4230580A1
公开(公告)日：2023-08-23
申请号：EP22891174.9
申请日：2022-11-11
发明人： CAO, Minglei , WANG, Qin , YANG, Jiaojiao
摘要： The present disclosure relates to a titanium-zirconium co-doped carbon-coated lithium iron phosphate material and a production method and use thereof. The material has a chemical formula of Li 1-y Zr y Fe 1-x Ti x PO 4 /C, wherein titanium is doped to Fe site, zirconium is doped to Li site, 0.001≤x≤0.05, and 0.001≤y≤0.02. The production method comprises mixing iron phosphate, lithium carbonate, a carbon source, a titanium source and a zirconium source in a liquid medium, ball-milling and sand-milling the mixture to a certain slurry particle size, spray-drying the slurry for granulation, and then sintering the dried spray material in an atmosphere furnace. The material is used as a positive electrode material in lithium-ion batteries. In the present disclosure, by doping titanium and zirconium elements into carbon-coated lithium iron phosphate, the ion and electron transport capacity of lithium iron phosphate is effectively enhanced and the compaction density of the material is improved. The material is very suitable to be used as a positive electrode material for a lithium-ion power battery with high energy and high power density.
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6.发明公开
公开(公告)号：EP4406915A1
公开(公告)日：2024-07-31
申请号：EP23843969.9
申请日：2023-12-13
发明人： WANG, Qin , HUANG, Shanshan , YANG, Jiaojiao
IPC分类号： C01B25/455
CPC分类号： Y02W30/84
摘要： The present invention relates to the field of sodium-ion battery technology, and specifically, to a method for preparing carbon-coated sodium iron fluorophosphate from waste lithium iron phosphate and the application thereof. The method for preparing carbon-coated sodium iron fluorophosphate from waste lithium iron phosphate includes: mixing a waste lithium iron phosphate material with an alkaline solution for reaction, followed by solid-liquid separation, to obtain an aluminum-containing filtrate and a lithium iron phosphate filter residue; mixing the lithium iron phosphate filter residue, aluminum chloride and sodium chloride uniformly, followed by vacuum calcination, to obtain a calcination material; and mixing the calcination material with at least one of a sodium source, an iron source and a phosphorus source uniformly to obtain a mixture to which a fluorine source, a carbon source and a solvent are added for uniformly mixing, followed by drying and calcination sequentially to obtain the carbon-coated sodium iron fluorophosphate. The method has the advantages of low costs, a high added value, a short process, and a high recovery rate, and the carbon-coated sodium iron fluorophosphate obtained from the method has excellent electrochemical performance.
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公开(公告)号：EP4283713A1
公开(公告)日：2023-11-29
申请号：EP22912780.8
申请日：2022-12-09
发明人： WANG, Qin
IPC分类号： H01M4/136
摘要： The present disclosure provides a high-rate lithium iron phosphate positive electrode material comprising lithium iron phosphate and carbon coated on a surface of the lithium iron phosphate, wherein a primary particle of the material has a particle size of 30-70 nm. The material of the present disclosure has a small and uniform primary particle size, no large single crystal particles, and a high specific surface area, and the battery prepared with the material has a high capacity, good cycle performance, excellent rate performance and low temperature performance. The present disclosure also provides a method for preparing the high-rate lithium iron phosphate positive electrode material, which has a simple process, is environmentally friendly, does not need precursors or expensive equipment, and has low cost.
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公开(公告)号：EP4394937A1
公开(公告)日：2024-07-03
申请号：EP23769636.4
申请日：2023-03-08
发明人： YANG, Jiaojiao , ZHAO, Along , ZHAO, Xu , WANG, Qin , CHEN, Zhongxue , WU, Honglun
IPC分类号： H01M4/38 , H01M4/58 , H01M10/054 , H01M4/134 , H01M4/136
CPC分类号： Y02E60/10
摘要： The present disclosure relates to the technical field of sodium ion battery materials, and in particular to an iron-based composite phosphate cathode material and a preparation method thereof, and a cathode plate and a sodium ion battery. The method for preparing an iron-based composite phosphate cathode material includes: uniformly mixing a sodium source, a phosphorus source, a carbon source, and water, and then mixing same with iron phosphate to obtain a first mixed system; and grinding the first mixed system to obtain a second mixed system, and then drying and sintering same. In the first mixed system, the total mass of Na element, Fe element, (PO4)3-, and the carbon source is 30%-40% of the mass of the water; and the viscosity of the second mixed system is greater than or equal to 300 Pa.S. According to the method, a solid reactant can be solubilized during grinding to achieve a homogeneous reaction function, the drying and sintering are further performed to obtain the iron-based composite phosphate cathode material, and the material is uniformly sized nano spherical particles.
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9.发明公开
公开(公告)号：EP4450457A1
公开(公告)日：2024-10-23
申请号：EP23895547.0
申请日：2023-08-31
发明人： LIU, Shiqi , GUO, Miyan , XU, Shanwan , WANG, Hui , XU, Peng , WANG, Qin
IPC分类号： C01B25/37 , C01B25/45 , H01M10/0525 , H01M4/58
摘要： The present invention belongs to the field of ferric phosphate preparation, and provides high tap density ferric phosphate, a preparation method thereof, and lithium iron phosphate. The method includes following steps: (a) feeding a ferrous sulfate solution and a phosphate solution including hydrogen peroxide simultaneously into a first reactor for mixing and reacting to obtain nucleated ferric phosphate; wherein a molar ratio of iron element to phosphorus element in the feeding process is 1:1, and a stirring speed is 500-600r/min; (b) discharging the nucleated ferric phosphate to a second reactor for growth to obtain amorphous ferric phosphate slurry, and post-processing the amorphous ferric phosphate slurry to obtain the high tap density ferric phosphate; wherein a stirring speed is 120-150r/min. The first reactor is a small-volume reactor, and the second reactor is a large-volume reactor. The present invention solves the technical problems of high production cost of ferric phosphate, easy destruction of particle crystal structure, distortion of crystal lattice, and high impurity content, and achieves the technical effect of preparation of high tap density ferric phosphate at low production cost.
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10.发明公开
公开(公告)号：EP4394989A1
公开(公告)日：2024-07-03
申请号：EP22956358.0
申请日：2022-12-26
发明人： FANG, Chun , LIU, Shiqi , CHENG, Fangyuan , ZOU, Yuqian
IPC分类号： H01M10/0569 , H01M10/0525
CPC分类号： Y02E60/10
摘要： The present disclosure relates to the technical field of Lithium Ion Batteries, and in particular to a low-temperature Lithium Ion Battery electrolyte and a preparation method thereof, and a Lithium Ion Battery. The low-temperature Lithium Ion Battery electrolyte includes an electrolyte salt and an organic solvent; and the organic solvent includes fluorocarboxylate ester, fluorocarbonate ester, and 1,3-dioxolane. The fluorocarboxylate ester has a low freezing point, and is suitable for being used as a low-temperature electrolyte solvent; the fluorocarbonate ester is used as a co-flux, and is mixed with the fluorocarboxylate ester to adjust low-temperature performance and film-forming property of the electrolyte; and battery impedance is significantly reduced after the 1,3-dioxolane with a low freezing point and viscosity is introduced. The low-temperature Lithium Ion Battery electrolyte of the present disclosure may effectively improve the conductivity of lithium ions at low temperatures, which is conducive to the performance of the capacity of the Lithium Ion Battery at low temperatures, in particular, the discharge specific capacity and capacity retention of the lithium iron phosphate Lithium Ion Battery at low temperatures may be improved.
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