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    • 2. 发明专利
    • Method for reprocessing and synthesizing metal oxide positive electrode active material for lithium secondary battery
    • 用于锂二次电池的金属氧化物电极活性材料的替代和合成方法
    • JP2012064557A
    • 2012-03-29
    • JP2011007943
    • 2011-01-18
    • Korea Institute Of Science And Technologyコリア・インスティテュート・オブ・サイエンス・アンド・テクノロジー
    • JEONG KYEONG-YUNYI HWA-YEONGCHO BYUNG-WON
    • H01M10/54H01M4/505H01M4/525
    • H01M10/54C01G53/42C01P2006/40H01M4/0471H01M4/049H01M4/505H01M4/525Y02E60/122Y02W30/84
    • PROBLEM TO BE SOLVED: To provide a method for reprocessing a metal oxide positive electrode active material for a lithium secondary battery and a method for synthesizing a metal oxide positive electrode active material for a lithium secondary battery by the method for reprocessing.SOLUTION: A method for reprocessing a metal oxide positive electrode active material for a lithium secondary battery according to the present invention includes the steps of: (a) dissolving a positive electrode active material from a waste lithium secondary battery using a sulfuric acid solution containing sulfurous acid gas to form a metal ion-containing solution; (b) injecting a sodium hydroxide solution and an aqueous ammonium solution in the metal ion-containing solution to form an electrode active material precursor; and (c) further filtrating, drying and grinding the electrode active material precursor, thus to obtain a solid-state positive electrode active material precursor. A method for synthesizing a metal oxide positive electrode active material for a lithium secondary battery according to the present invention comprises a step of mixing the electrode active material precursor formed by the method for reprocessing with lithium carbonate or lithium hydroxide, followed by heat treatment, to form a metal oxide positive electrode active material.
    • 解决的问题:提供一种用于再生锂二次电池用金属氧化物正极活性物质的方法和通过再处理方法合成锂二次电池用金属氧化物正极活性物质的方法。 解决方案:根据本发明的用于再生锂二次电池用金属氧化物正极活性物质的方法包括以下步骤:(a)使用硫酸将来自废锂二次电池的正极活性物质溶解 含有亚硫酸气体的溶液形成含金属离子的溶液; (b)在含金属离子的溶液中注入氢氧化钠溶液和铵水溶液以形成电极活性物质前体; 和(c)进一步过滤,干燥和研磨电极活性材料前体,从而获得固态正极活性物质前体。 本发明的锂二次电池用金属氧化物正极活性物质的合成方法包括将通过后处理方法形成的电极活性物质前体与碳酸锂或氢氧化锂混合后进行热处理的工序, 形成金属氧化物正极活性物质。 版权所有(C)2012,JPO&INPIT