Morina Riccardo, Callegari Daniele, Merli Daniele, Alberti Giancarla, Mustarelli Piercarlo, Quartarone Eliana
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, Via Cozzi 55, 20126, Milano, Italy.
Dipartimento di Chimica, Università degli Studi di Pavia, Via Taramelli 12, 27100, Pavia, Italy.
ChemSusChem. 2022 Jan 21;15(2):e202102080. doi: 10.1002/cssc.202102080. Epub 2021 Dec 23.
The transition to a circular economy vision must handle the increasing request of metals required to satisfy the battery industry; this can be obtained by recycling and feeding back secondary raw materials recovered through proper waste management. Here, a novel and green proof-of-concept was developed, based on deep eutectic solvents (DESs) to fully and easily recover valuable metals from various cathode active materials, including LiMn O , LiNi Mn O , and LiNi Co O . DES composed of choline chloride and lactic acid could leach Li, Mn, Co, and Ni, achieving efficiency of 100 % under much milder conditions with respect to the previous literature. For the first time, to our best knowledge, a two-step approach was reported in the case of LiNi Co O for selective recovery of Li, Co, and Ni with high yield and purity. Furthermore, other cathode components, namely aluminum current collector and binder, were found to be not dissolved by the proposed DES, thus making a simple separation from the active material possible. Finally, this strategy was designed to easily regenerate and reuse the leaching solvents for more than one extraction, thus further boosting process sustainability.
向循环经济愿景的转变必须应对满足电池行业所需金属日益增长的需求；这可以通过回收和反馈通过适当的废物管理回收的二次原材料来实现。在此，基于深共晶溶剂（DESs）开发了一种新颖且绿色的概念验证方法，以从包括LiMnO、LiNiMnO和LiNiCoO在内的各种阴极活性材料中完全且轻松地回收有价值的金属。由氯化胆碱和乳酸组成的DES可以浸出Li、Mn、Co和Ni，相对于先前的文献，在温和得多的条件下实现了100%的效率。据我们所知，首次报道了在LiNiCoO的情况下采用两步法以高收率和纯度选择性回收Li、Co和Ni。此外，发现其他阴极组件，即铝集流体和粘合剂，不会被所提出的DES溶解，从而使得与活性材料的简单分离成为可能。最后，该策略旨在轻松再生和重复使用浸出溶剂进行多次萃取，从而进一步提高工艺的可持续性。
