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公开(公告)号：US20240347803A1
公开(公告)日：2024-10-17
申请号：US18682455
申请日：2022-04-28
申请人： HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP EV RECYCLING CO., LTD.
发明人： Xingen Chen , Ran He , Leijun Cao , Liang Li , Honghui Tang , Changdong Li
摘要： The present disclosure belongs to the field of lithium ion battery recovery and discloses a method for selectively recovering valuable metals in waste lithium batteries. The method includes the following steps: adding a sulfur-containing compound to waste lithium battery for calcination and water leaching to obtain lithium carbonate solution and filter residue; adding sulfuric acid and an iron-containing compound to the filter residue for leaching, performing solid-liquid separation, and taking solid phase to obtain manganese dioxide and graphite residue; extracting and reverse extracting liquid phase from the solid-liquid separation to obtain nickel cobalt sulfate solution and manganese sulfate solution. The method of the present disclosure selectively extracts lithium in waste ternary cathode materials by calcination and water leaching, and realizes selective low manganese leaching based on the principle that divalent manganese can reduce the high oxide of nickel and cobalt in the leaching stage.
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公开(公告)号：US12119463B2
公开(公告)日：2024-10-15
申请号：US16343224
申请日：2017-10-12
申请人： DUESENFELD GMBH
发明人： Christian Hanisch
摘要： The invention relates to a method for treating used lithium batteries (10) containing the steps: comminuting the batteries (10) such that comminuted material (24) is obtained, and (b) inactivating of the comminuted material (24) such that an inactive comminuted material (42) is obtained. According to the invention, the drying is conducted at a maximum pressure of 300 hPa and a maximum temperature of 80° C. and the deactivated comminuted material (42) is not filled into a transport container and/or said deactivated comminuted material is immediately further processed after the drying process.
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公开(公告)号：US12113187B2
公开(公告)日：2024-10-08
申请号：US18498037
申请日：2023-10-31
发明人： Kaihua Xu , Liangxing Jiang , Jian Yang , Kun Zhang , Chenwei Li , Yongan Chen , Yanqing Lai
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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公开(公告)号：US12110231B2
公开(公告)日：2024-10-08
申请号：US18289488
申请日：2022-08-31
申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , YICHANG BRUNP RECYCLING TECHNOLOGY CO., LTD.
发明人： Linshao Zhang , Changdong Li , Dingshan Ruan , You Zhou , Qiang Li , Yong Cai
IPC分类号： C01B32/225 , H01M10/54
CPC分类号： C01B32/225 , C01P2004/03 , H01M10/54
摘要： A preparation method comprises the following steps: (1) in a protective atmosphere, mixing a graphite powder with a metal peroxide and/or alkali metal superoxide, and leaving same to stand to obtain a mixed graphite-metal peroxide and/or graphite-alkali metal superoxide composite material; (2) putting the composite material prepared in step (1) into a liquid medium, which can react with the metal peroxide and/or the alkali metal superoxide, for a reaction to obtain intercalated graphite; and (3) heating the intercalated graphite prepared in step (2) to prepare the expanded graphite. The preparation method can effectively avoid the generation of harmful impurities such as sulfur and sulfides during the preparation process of the expanded graphite, thereby reducing environmental pollution.
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公开(公告)号：US12107244B2
公开(公告)日：2024-10-01
申请号：US16733537
申请日：2020-01-03
CPC分类号： H01M10/54 , B02C19/186 , B02C23/10 , B02C23/14 , B02C23/16 , B03C1/30 , H01M10/0525 , B03C2201/20
摘要： A method for recovering a valuable material from a lithium ion secondary battery includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a first stage of classification step of classifying a crushed object obtained through the crushing step based on a classification point of 1.2 to 2.4 mm, and a second stage of classification step of classifying an intermediate product and a fine particle product obtained on a fine side in the first stage of classification step based on a classification point of 0.3 mm or less; and a dry magnetic separation step of repeating one time or more a step of performing dry magnetic separation on an intermediate product obtained on a coarse side in the second stage of classification step and performing dry magnetic separation again.
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6.发明公开公开(公告)号：US20240318341A1
公开(公告)日：2024-09-26
申请号：US18431093
申请日：2024-02-02
申请人： HYDRO-QUÉBEC
发明人： François LAROUCHE , Kamyab AMOUZEGAR , Gabriel GIRARD , Martin DONTIGNY , Abdelbast GUERFI , Benoit FLEUTOT , Chisu Kim
摘要： A relithiated Li intercalation material for producing Li metal or an alloy thereof or for pre-lithiating an electrode material as well as an anode and an electrolysis cell comprising same are provided. A method of producing Li metal or an alloy thereof or for pre-lithiating an electrode material is also provided. This method comprises carrying out a Li production electrolysis reaction in the electrolysis cell, wherein the electrolysis cell comprises the relithiated Li intercalation material as an anode, a current collector as a cathode, and an electrolyte comprising a lithium salt.
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公开(公告)号：US20240313285A1
公开(公告)日：2024-09-19
申请号：US18268445
申请日：2021-12-17
发明人： Ahmad Ghahreman , Harshit Mahandra , Yeonuk Choi
摘要： Methods for recycling lithium and iron containing material, such as batteries, include selectively leaching lithium from the material by disposing the material in a powder form in a solution comprising formic acid and hydrogen peroxide, filtering the solution to obtain a first leach liquor comprising lithium and a residue comprising iron phosphate and carbon, subjecting the first leach liquor to a first precipitation to remove residual iron from the leach liquor and obtain a second leach liquor, and subjecting the second leach liquor to a second precipitation, wherein lithium is precipitated and a third leach liquor is obtained. The third leach liquor may be subjected to a third precipitation using trisodium phosphate or sodium carbonate. The material may be a battery cathode, such as a lithium iron phosphate battery cathode.
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公开(公告)号：US20240309520A1
公开(公告)日：2024-09-19
申请号：US18122599
申请日：2023-03-16
申请人： Lyten, Inc.
发明人： Jesse Baucom , Sanjeev Kolli
摘要： The presently disclosed concepts relate to improved techniques for critical mineral extraction, purification, precipitation, ion exchange, and metal production using a solid electrolyte membrane. By using a solid electrolyte embedded in a matrix, alkali metal (such as lithium) can be more effectively separated from feed solutions. Additionally, energy used to initially extract critical minerals from a feed solution may be stored as electrochemical energy, which in turn, may be discharged when critical minerals are depleted from the electrode. This discharged energy may therefore be reclaimed and reused to extract additional critical minerals.
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公开(公告)号：US12095058B2
公开(公告)日：2024-09-17
申请号：US18289053
申请日：2022-08-25
申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP EV RECYCLING CO., LTD.
发明人： Haijun Yu , Yinghao Xie , Aixia Li , Xuemei Zhang , Changdong Li
摘要： A method for preparing a copper-based anode material from a waste battery includes the following steps: (1) disassembling a waste battery and taking out an anode plate; (2) using the anode plate in step (1) as an anode and taking a copper foil current collector as a cathode, and placing the anode and the cathode in an electroplating solution for electroplating; (3) after the electroplating is completed, collecting anode powder separated from the anode and soaking the copper foil current collector in an acid solution; (4) washing and drying the soaked copper foil current collector; and (5) calcinating the copper foil current collector to obtain a copper-base anode material.
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公开(公告)号：US20240304877A1
公开(公告)日：2024-09-12
申请号：US18595930
申请日：2024-03-05
申请人： AGR LITHIUM INC.
发明人： Vijay CHAUDHARI , Amol NAIK , Vipin TYAGI , Nishchay CHADHA
摘要： A method of discharging a spent lithium-ion (Li-ion) battery may include contacting external electrodes of the spent Li-ion battery to a discharging solution. The discharging solution including an aqueous solution of salts having a same anion and a redox couple as cations. The redox couple includes a first cation of a metal having a first oxidation state and a second cation of the same metal having a second oxidation state different from the first oxidation state.
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