Selective lithium recovery from black powder of spent lithiumion batteries via sulfation reaction:phase conversion and impurities influence

作     者：Hao Liu Jia-Liang Zhang Guo-Qiang Liang Meng Wang Yong-Qiang Chen Cheng-Yan Wang Hao Liu;Jia-Liang Zhang;Guo-Qiang Liang;Meng Wang;Yong-Qiang Chen;Cheng-Yan Wang

作者机构：State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijing100083China School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Green Recycling and Extraction of MetalsBeijing100083China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第7期

页      面：2350-2360页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 0703[理学-化学] 

基　　金：financially supported by the Key R&D Program of Zhejiang(No.2022C03074) the National Natural Science Foundation of China(Nos.51834008 and 51874040) 

主　　题：Spent lithium-ion batteries(LIBs) Thermodynamic calculations Sulfation roasting Impurity elements Conversion mechanism 

摘      要：The aim of this study is to present a new understanding for the selective lithium recovery from spent lithium-ion batteries(LIBs)via sulfation *** composition of roasting products and reaction behavior of impurity elements were analyzed through thermodynamic ***,the effects of sulfuric acid dosage,roasting temperature,roasting time,and impurity elements were assessed on the leaching efficiency of valuable *** methods such as X-ray diffraction(XRD),scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS),and X-ray photoelectron spectroscopy(XPS)were employed to analyze the phase transformation mechanism during roasting *** results indicate that after sulfation roasting(n(H_(2)SO_(4)):n(Li)=0.5,550℃,2 h),94%lithium can be selectively recovered by water leaching and more than 95%Ni,Co,and Mn can be leached through acid leaching without the addition of reduction *** the sulfation roasting process,the lithium in LiNi_(x)Mn_(y)Co_zO_(2)is mainly converted to Li_(2)SO_(4),while the Ni,Co and Mn are first transformed to sulfate and then converted into oxide *** addition,impurity elements such as Al and F will combine with lithium to form LiF and LiAlO_(2),which will reduce the leaching rate of *** results provide a new understanding on the mechanisms of phase conversion during sulfation roasting and reveal the influence of impurity elements for the lithium recovery from spent LIBs.