三乙醇胺溶解分离回收铝钴膜废料正极材料

Recovery of Cathode Material from Spent LiCoO_2 Materials with Triethanolamine

以铝钴膜边角料为研究对象,开展从废料直接回收钴酸锂正极材料的研究工作,结果表明,控制反应温度50℃、反应时间2h、三乙醇胺浓度0.5mol/L、固液比0.75/10、超声频率18kHz的条件下,可以剥离81%的钴酸锂正极材料,较其他强酸体系对钴酸锂材料本身的破坏作用要小,可以直接回收钴酸锂。回收后钴酸锂的结构和形貌有一定的变化,但不显著。

Process to recycle lithium cobalt oxide cathode material directly from scrap of cobalt-aluminium film was investigated. The results show that 81% of lithium cobalt oxide cathode material can be recovered under the conditions including reaction temperature of 50℃, reaction time of 2 h, triethanolamine concentration of 0. 5 mol/L, ratio of solid to liquid of 0. 75/10, and ultrasonic frequency of 18 kHz. The process exerts much fewer damaging effects on lithium cobalt oxide than other strong acid system. With little change on structure and morphology, lithium cobalt oxide can be recycled directly to produce lithium battery.