文献类型：期刊文献

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

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

机构：[1] School of Chemical Engineering, The University of Queensland, St Lucia, Brisbane, 4072, Australia; [2] Department of Chemistry and Biotechnology, Centre for Translational Atomaterials and ARC Training Centre for Surface Engineering for Advanced Materials, SEAM, Swinburne University of Technology, Hawthorn, Melbourne, VIC, 3122, Australia; [3] Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, 4072, Australia; [4] Centre for Microscopy and Microanalysis, The University of Queensland, St Lucia, Brisbane, 4072, Australia; [5] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2021

卷号：14

期号：14

起止页码：2972

外文期刊名：ChemSusChem

收录：EI(收录号：20212510526717)

语种：英文

外文关键词：Chlorine compounds - Environmental impact - Lithium compounds - Metabolism - Cobalt compounds - Solvents - Eutectics - Lithium-ion batteries - Urea - Cathodes - Ions

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 °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. ? 2021 Wiley-VCH GmbH.