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1.发明公开
公开(公告)号：EP4084136A1
公开(公告)日：2022-11-02
申请号：EP19957734.7
申请日：2019-12-27
发明人： XU, Kaihua , JIANG, Zhenkang , ZHANG, Kun , XUE, Xiaofei , LI, Cong , SUN, Haibo , CHEN, Kang , LI, Jun , FAN, Liangjiao
摘要： A method for preparing a MOF-coated monocrystal ternary positive electrode material and a precursor thereof. Firstly, a solution A of nickel, cobalt, and manganese metal salts is prepared according to a molar ratio, and an ammonia complexing agent solution and a caustic soda liquid are prepared. Then the solution A, the ammonia complexing agent solution, and the caustic soda liquid are added to a reactor and reacted to obtain a precursor core. Afterwards, an organic carboxylate is dissolved in an organic solvent to obtain a solution B. The B solution and a manganese metal salt solution are added to the above reactor and reacted, and a MOF-coated core-shell structure precursor is obtained after aging. The core-shell structure precursor is pre-sintered at a low temperature to obtain a nickel-cobalt-manganese oxide with a monocrystal structure. The nickel-cobalt-manganese oxide with the monocrystal structure is uniformly mixed with lithium hydroxide monohydrate in a mortar and the mixture is calcined at a high temperature to obtain a MOF-coated monocrystal ternary positive electrode material. The problems of poor cyclic and thermal stability caused by high nickel content are thus overcome, and the obtained positive electrode material has electrochemical properties of high rate, high capacity, and high cycle performance.
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2.发明公开
公开(公告)号：EP4455092A1
公开(公告)日：2024-10-30
申请号：EP22948868.9
申请日：2022-08-26
发明人： XU, Kaihua , XUE, Xiaofei , ZHANG, Kun , HUA, Wenchao , LI, Cong , FAN, Liangjiao , LI, Xueqian
IPC分类号： C01G53/00 , C01G49/00 , H01M10/054
摘要： Disclosed in the present disclosure are a positive electrode material precursor and a positive electrode material and preparation methods therefor, and a sodium-ion battery. The positive electrode material precursor comprises an inner core and a shell wrapping the periphery of the inner core, wherein the inner core is Ni x Fe y Mn 1-x-y (OH) 2 , where 0.2 ≤ x ≤ 0.7, and 0.2 ≤ y ≤0.5; the shell is M a Mn 1-a (OH) 2 , where M is nickel or iron, and 0.05 ≤ a ≤ 0.7; and both the inner core and the shell are formed by stacking flaky primary particles. In the positive electrode material precursor provided in the present application, by controlling the components of the inner core and the shell and using a loose structure thereof formed by stacking flaky primary particles in combination, a heterostructure positive electrode material with an O3-phase inner core and a P2-phase shell can be obtained; and due to the synergistic effect of the two-phase structure, the heterostructure positive electrode material has both high capacity and high cycle stability, such that the electrochemical performance of a sodium-ion battery can be further improved. In addition, the preparation method for a positive electrode material provided in the present application is simple, has a relatively low cost, and is suitable for industrial large-scale production.
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3.发明公开
公开(公告)号：EP4455093A1
公开(公告)日：2024-10-30
申请号：EP23916603.6
申请日：2023-04-10
发明人： XU, Kaihua , ZHANG, Kun , SUN, Zhaojian , LI, Cong , WANG, Wenguang
摘要： Provided are a cathode material for sodium-ion batteries, a preparation method therefor, and an application thereof, and the preparation method comprises the following steps: (1) mixing a nickel source, a manganese source, and a magnesium source to obtain a ternary salt solution, adding the ternary salt solution, a precipitating agent, a complexing agent, a boron source solution, and an organic additive to a reaction vessel in parallel flow, and performing a reaction to obtain a B-doped radially-packed hydroxide precursor; and (2) mixing the B-doped radially-packed hydroxide precursor obtained in step (1) with a sodium source, and performing sintering treatment to obtain the cathode material for sodium-ion batteries. In the present application, the chemical composition (B-doping) and microscopic morphology (radial-packed arrangement of primary particles) of the cathode material are synergistically modified and regulated by optimizing the co-precipitation process, so as to improve the element distribution uniformity, structure stability, cycle performance, rate capability, and production efficiency of the cathode material for sodium-ion batteries simultaneously.
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公开(公告)号：EP4324949A1
公开(公告)日：2024-02-21
申请号：EP22863039.8
申请日：2022-08-09
发明人： XU, Kaihua , JIANG, Liangxing , YANG, Jian , ZHANG, Kun , LI, Chenwei , CHEN, Yongan , LAI, Yanqing
IPC分类号： C22B26/12 , C01F11/22 , C22B1/02 , H01M10/0525 , C22B1/00 , C22B47/00 , C22B7/00 , H01M10/54 , C22B23/00
摘要： The present invention provides a method for recovering valuable metals from waste lithium ion batteries. The method comprises: short-circuit discharging, dismantling, crushing, roasting, and screening on waste lithium ion batteries to obtain active electrode powders; using alkaline solution to wash the active electrode powders, then filtering to remove copper and aluminum; drying the activated electrode powder after alkaline washing treatment, mix the dried activated electrode powder with starch and concentrated sulfuric acid and stir evenly to obtain the mixed material; calcining the mixed material with controlling the atmosphere; taking out the product obtained from calcination and using deionized water to extract the leachate and leaching residue with valence metal ions, and then obtaining the leachate after filtering. The present invention can reduce the concentration of impurity ions in the leaching solution, improve the purity and comprehensive recovery rate of valuable metals, and reduce the recovery cost.
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5.发明公开
公开(公告)号：EP4087015A1
公开(公告)日：2022-11-09
申请号：EP19958607.4
申请日：2019-12-31
发明人： XU, Kaihua , JIANG, Zhenkang , LI, Qinxiang , ZHANG, Kun , WANG, Wenjie , WANG, Jun , WEN, Shihong
IPC分类号： H01M10/54
摘要： Provided are a battery-level Ni-Co-Mn mixed solution and a preparation method for a battery-level Mn solution, the steps thereof comprising: acid dissolution (S1), alkalization to remove impurities (S2), synchronous precipitation of calcium, magnesium, and lithium (S3), deep ageing to remove impurities (S4), synergistic extraction (S5), and refining extraction (S6). The steps of deep ageing to remove impurities (S4) and synergistic extraction (S5) comprise: performing deep ageing on a filtrate obtained from the step of synchronous precipitation of calcium, magnesium, and lithium (S3), and after performing filtration to remove impurities, obtaining an aged filtrate; using P204 to extract the aged filtrate and obtain a loaded organic phase, and subjecting the loaded organic phase to staged back-extraction to obtain the battery-level Ni-Co-Mn mixed solution and a Mn-containing solution. By means of the cooperation between the multiple process steps of synchronous precipitation of calcium, magnesium, and lithium (S3), deep ageing to remove impurities (S4), and synergistic extraction (S5), the impurity content of the obtained battery-level Ni-Co-Mn mixed solution is significantly lowered, and the battery-level Ni-Co-Mn mixed solution can be directly used to prepare a lithium battery ternary precursor material. At the same time, the battery-level Mn solution can also be obtained, which is favorable for large-scale applications of the process and increasing economic benefits.
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6.发明公开
公开(公告)号：EP4299650A1
公开(公告)日：2024-01-03
申请号：EP22932482.7
申请日：2022-08-18
申请人： Jingmen Gem Co., Ltd
发明人： XU, Kaihua , YUE, Xianjin , ZHANG, Kun , HUA, Wenchao , LI, Cong , YANG, Xing , LV, Hao , YUAN, Wenfang , JIA, Dongming , XUE, Xiaofei , LI, Xueqian , FAN, Liangjiao , XIANG, Xing , ZHU, Xiaoshuai , SHI, Jiamin , GONG, Zhengjie , YIN, Daodao
IPC分类号： C08G83/00 , H01M4/13 , H01M10/0525 , C01G53/00
摘要： The present application provides a core-shell gradient ternary precursor and a preparation method and application thereof. The preparation method includes the following steps: (1) mixing a terephthalic acid solution with alkaline liquor to obtain a terephthalic acid salt solution, adding a nickel source solution for a reaction to obtain a Ni-MOF solution, mixing the Ni-MOF solution with ammonia water, and adjusting a pH value to obtain a base solution; and (2) adding a nickel-cobalt-manganese ternary mixed salt solution, a liquid alkali solution, and an ammonia-water solution simultaneously to the base solution obtained in step (1) for a co-precipitation reaction, and obtaining the core-shell gradient ternary precursor after aging treatment. The present application pre-prepares Ni-MOF, uses Ni-MOF as a core for the co-precipitation reaction, and prepares to obtain the core-shell like precursor with a gradient. In a process of preparing a positive electrode material, carbon in the core of the core-shell gradient ternary precursor reacts with oxygen, thereby reducing a nickel oxidation state on particle surfaces and reducing generation of cracks.
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7.发明公开
公开(公告)号：EP4299530A1
公开(公告)日：2024-01-03
申请号：EP22899967.8
申请日：2022-08-18
申请人： Jingmen Gem Co., Ltd
发明人： XU, Kaihua , ZHANG, Kun , JIA, Dongming , LI, Cong , YANG, Xing , XUE, Xiaofei , FAN, Liangjiao , CHEN, Xiaofei , LI, Xueqian , ZHU, Xiaoshuai , LV, Hao , YUAN, Wenfang , WANG, Ding , YUE, Xianjin
IPC分类号： C01G53/00
摘要： A high-nickel ternary core-shell precursor for a lithium battery, a positive electrode material and a preparation method therefor. The chemical structural formula of the precursor is zNi(C 4 H 7 N 2 O 2 ) 2 -Ni x-z M1 y M2 1-x-y (OH) 2 , wherein M1 and M2 are two of cobalt, aluminum, and manganese. The preparation method comprises: pumping a prepared metal salt solution, a dimethylglyoxime-ammonia water composite solution, and an ammonia water solution into a reaction kettle, maintaining the pH of a reaction system, and controlling the reaction time to obtain a sphere-like precursor inner core with a structural formula of Ni(C 4 H 7 N 2 O 2 ) 2 ; pumping the metal salt solution and the ammonia water solution, stopping pumping the dimethylglyoxime-ammonia water composite solution, pumping a sodium hydroxide solution to obtain a sphere-like core-shell precursor, washing, drying, sieving and deironing the precursor, mixing with a lithium source, and calcining to prepare the positive electrode material. The material can keep high capacity and also has excellent cycle performance.
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8.发明公开
公开(公告)号：EP4322252A1
公开(公告)日：2024-02-14
申请号：EP22885236.4
申请日：2022-07-28
发明人： XU, Kaihua , HE, Rui , DING, Weifeng , ZHANG, Yunhe , ZHANG, Xiang , ZHANG, Kun
IPC分类号： H01M4/36 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/0525 , C01B21/06 , C01B21/068 , C01B21/072 , C01B21/076
摘要： The invention discloses a nitride/graphitized carbon nanosheet-coated ternary positive electrode material and preparation method therefor. The nitride/graphitized carbon nanosheet-coated ternary positive electrode material includes a ternary positive electrode material matrix and a coating layer; the coating layer is composed of nitride and graphitized carbon; and the graphitized carbon is formed in situ in the coating process of the nitride. Compared with a physical mixing method, the in-situ generated carbon layer is connected to the material matrix more tightly, and the formed conductive network is denser. So that the rate performance of the material is improved to the maximum extent. The preparation method is simple and easy to realize industrial production. And the obtained nitride/graphitized carbon nanosheet-coated ternary positive electrode material has excellent rate performance and cycling stability.
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