Cobalt Electrochemical Recovery from Lithium Cobalt Oxides in Deep Eutectic Choline Chloride+Urea Solvents
| Autor: | Linzhou Zhuang, Hongmin Wang, Thomas E. Rufford, Sahil Garg, Mohamed Nazmi Idros, Yuming Wu, Anya J.E. Yago, Mengran Li, Shuai Gao, Rosalie K. Hocking, Haoran Duan |
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| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
Materials science General Chemical Engineering Inorganic chemistry chemistry.chemical_element Substrate (chemistry) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Deep eutectic solvent Solvent chemistry.chemical_compound General Energy chemistry Environmental Chemistry General Materials Science Lithium 0210 nano-technology Cobalt Choline chloride Eutectic system |
| Zdroj: | ChemSusChem. 14:2972-2983 |
| ISSN: | 1864-564X 1864-5631 |
| DOI: | 10.1002/cssc.202100954 |
| Popis: | 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 - an 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 °C - 104 °C is essential to ensure a selective cobalt recovery at an optimal rate. We also found that the stainless-steel mesh as an optimal substrate for cobalt recovery due to its relatively high selectivity, fast recovery rate, and easy cobalt collection and substrate regeneration. 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. |
| Databáze: | OpenAIRE |
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