Novel Ionic Liquid-Based Aqueous Biphasic System with Amino Acids for Critical Metal Recovery from Lithium-Ion Batteries
Novel Ionic Liquid-Based Aqueous Biphasic System with Amino Acids for Critical Metal Recovery from Lithium-Ion Batteries
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DOI：
10.1021/acs.iecr.2c00295
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发表时间：
2022-04
期刊：
影响因子：
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通讯作者：
Chunqing Cai;Takafumi Hanada;A. Fajar;M. Goto
中科院分区：
文献类型：
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作者：
Chunqing Cai;Takafumi Hanada;A. Fajar;M. Goto
电动汽车时代正在迅速到来，因此，为确保锂离子电池的循环经济提供可持续的技术至关重要。在这项研究中，我们报道了一种新型的双水相体系(ABS)的开发，该体系包括完全生物相容的组分，即亲水性离子液体、氨基酸和有机酸，用于从废旧锂离子电池中的关键金属锰(II)中选择性地回收Co(II)和Ni(II)。用ABS从硫酸盐介质中成功地实现了Co(II)、Ni(II)和Mn(II)的分离，无需任何有害试剂或有机溶剂。此外，还阐明了ABS中金属离子分离的可能机理。再生离子液体在ABS中连续三个实验循环使用，表现出非常稳定的性能。
The era of electric vehicles is rapidly approaching, and therefore, it is crucial to provide a sustainable technology for ensuring the circular economy of lithium-ion batteries. In this study, we report the development of a novel aqueous biphasic system (ABS) comprising fully biocompatible components, that is, hydrophilic ionic liquids, amino acids, and organic acids, for the selective recovery of Co(II) and Ni(II) from Mn(II), which are critical metals in spent lithium-ion batteries. Separation of Co(II), Ni(II), and Mn(II) from sulfate media was successfully carried out using the ABS in a quite straightforward manner without any hazardous reagents or organic solvents. In addition, the plausible mechanism of metal ion separation within the ABS was elucidated. The regenerated ionic liquid in the ABS exhibited remarkably stable performance during use in three consecutive experimental cycles.