酸化焙烧法回收锂电池正极材料过程中元素的迁移规律及赋存状态研究  

Research on Sates of Elements Removing Rule and Keeping Status during Acidifying Roasting Collecting Lithium Battery Cathode Material

作　　者：王大辉[1] 李辉辉[1] 姜丽丽[1] 刘沛静 寇生中[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

出　　处：《新技术新工艺》2014年第12期94-97,共4页New Technology & New Process

基　　金：国家自然科学基金资助项目(51264027);国家重点基础研究发展规划(973计划)资助项目(2012CB722806);甘肃省有色金属新材料省部共建国家重点实验室基金资助项目(SKL12003)

摘　　要：为研究锂离子电池正极材料钴酸锂经酸化焙烧后有价元素Co、Li的迁移规律和赋存状态,将K2S2O7与LiCoO2以摩尔比1∶1.5的比例研磨混合均匀,在马弗炉中不同温度下恒温焙烧0.5h,采用XRD、TG-DSC-MS、SEM和EDS对焙烧产物中Co、Li元素的赋存状态进行了分析。结果表明,当焙烧温度〈200℃时,仅发生吸附水的物理脱附,产物形貌及相组成无明显变化;随着焙烧温度的升高,产物形貌开始出现团聚现象,相组成逐渐变为KLiSO4、K2Co2（SO4）3和K2SO4,且在400-500℃时检测到SO2和O2气体。To study the transferring disciplinarian and mode of occurrence of the valuable elements Co and Li in anode scrap materials of lithium-ion battery by salinization roasting,the mixture of cathode scrap materials LiCoO2,K2S2O7 with a mass ratio of 1∶1.5was roasted for 0.5hat different calcination temperatures.Analyzed the mode of occurrence of Co and Li in the product of roasting with XRD,TG-DSC-MS,SEM and EDS.Whon the roasting temperature is below 200℃,the product occurs only physically adsorbed water desorption.With the increase of calcination temperature,the product began to appear reunion phenomenon,the composition becomes gradually KLiSO4,K2Co2（SO4）3,K2SO4,and the SO2,O2 gas is detected at 400 - 500 ℃.

关 键 词：钴酸锂 酸化焙烧 赋存形式 元素迁移 

分 类 号：O646.21[理学—物理化学]