文献类型：期刊文献

英文题名：Cobalt Electrochemical Recovery from Lithium Cobalt Oxides in Deep Eutectic Choline Chloride plus Urea Solvents

作者：Wang, Hongmin[1];Li, Mengran[1];Garg, Sahil[1];Wu, Yuming[1];Idros, Mohamed Nazmi[1];Hocking, Rosalie[2,3];Duan, Haoran[1,4];Gao, Shuai[1];Yago, Anya Josefa[5];Zhuang, Linzhou[6];Rufford, Thomas Edward[1]

机构：[1]Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia;[2]Swinburne Univ Technol, SEAM, Ctr Translat Atomat, Dept Chem & Biotechnol, Melbourne, Vic 3122, Australia;[3]Swinburne Univ Technol, SEAM, ARC Training Ctr Surface Engn Adv Mat, Melbourne, Vic 3122, Australia;[4]Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia;[5]Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia;[6]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：14

期号：14

起止页码：2972

外文期刊名：CHEMSUSCHEM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000662782300001)】；

基金：This work was supported by funding from a UQ Foundation Research Excellence Award. S.G., M.I, and Y.W. acknowledge PhD stipends from the UQ Graduate School's Research Training Program. We acknowledge technical support from the Centre for Microscopy and Microanalysis at UQ and from the Australian Synchrotron (Project ID M15867). We thank Dr Barbara Etschmann and Prof Joel Brugger for kindly sharing the data from their published work.[20]

语种：英文

外文关键词：cobalt; electrochemical recovery; electrochemistry; spent batteries; substrate

摘要：Electrochemical recovery of the cobalt in deep eutectic solvent shows its promise in recycling and recovery of valuable elements from the spent lithium-ion battery due to its high selectivity and minimal environmental impacts. This work unveiled the roles of the substrates, applied potentials, and operating temperatures on the performance of cobalt electrochemical recovery in a deep eutectic choline chloride+urea solvent. The solvent contains cobalt and lithium ions extracted from lithium cobalt oxides - 3an essential lithium-ion battery cathode material. Our results highlight that the substrate predetermines the cobalt recovery modes via substrate-cobalt interactions, which could be predicted by the cobalt surface segregation energies and crystallographic misfits. We also show that a moderate cathode potential under -1.0 V vs. silver quasi-reference electrode at 94-104 degrees C is essential to ensure a selective cobalt recovery at an optimal rate. We also found that the stainless-steel mesh is an optimal substrate for cobalt recovery due to its relatively high selectivity, fast recovery rate, and easy cobalt collection. Our work provides new insights on metal recovery in deep eutectic solvents and offers a new avenue to control the metal electrodeposition modes via modulation of substrate compositions and crystal structures.