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A Citric Acid/Na2S2O3 System for the Efficient Leaching of Valuable Metals from Spent Lithium-Ion Batteries

文献类型： 外文期刊

作者： Gao, Guilan 1 ; He, Xin 3 ; Lou, Xiaoyi 6 ; Jiao, Zheng 1 ; Guo, Yaoguang 2 ; Chen, Shuai 2 ; Luo, Xingmin 3 ; Sun, Suyan 1 ;

作者机构： 1.Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

2.Shanghai Polytech Univ, Res Ctr Resource Recycling Sci & Engn, Shanghai 201209, Peoples R China

3.Shanghai Polytech Univ, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China

4.Henan Polytech Univ, Henan Key Lab Coal Green Convers, Jiaozuo 454000, Henan, Peoples R China

5.Shanghai Waigaoqiao Free Trade Zone Environm Prot, Shanghai 200131, Peoples R China

6.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Key Lab Control Qual & Safety Aquat Prod, Minist Agr, Shanghai 200090, Peoples R China

期刊名称：JOM （ 影响因子：2.471； 五年影响因子：2.988 ）

ISSN： 1047-4838

年卷期： 2019 年 71 卷 10 期

页码：

收录情况： SCI

摘要： Recycling of valuable metals from spent lithium-ion batteries (LIBs) appears inevitable for both environmental protection and resource recovery. In the present study, an efficient hydrometallurgical leaching of Co and Li from cathode materials of spent LIBs using a citric acid/sodium thiosulfate (Na2S2O3) system is explored. The effects of citric acid and Na2S2O3 concentrations, leaching time, temperature, and the solid/liquid (S/L) ratio on the leaching processes are also examined. With the exception of the S/L ratio, the increase of citric acid concentration, Na2S2O3 concentration, leaching time, and temperature all have positive effects on the leaching of Co and Li. Ultimately, approximately 96% of Co and 99% of Li are recycled from the spent LIBs in this citric acid/sodium thiosulfate system under the leaching conditions of an S/L ratio of 20 g l(-1), concentration of Na2S2O3 of 0.3 M, concentration of citric acid of 1.2 M, leaching time of 30 min, and leaching temperature of 70 degrees C. The Avrami equation is well fitted by the data of the leaching processes, and model equations are built to describe the leaching of Co and Li. Furthermore, pure sulfur can be obtained as a by-product during the leaching process, and SO2 produced during the reaction is easily collected as a raw material for industrial production of sulfuric acid. The present study represents a promising process for hydrometallurgical recovery of valuable metals from spent LIBs.

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