Mild and green dissolution of lithium cobalt oxide (LCO) with high efficiency is challenging. Here, novel DESs based on poly(ethylene glycol) 200 and p-toluenesulfonic acid monohydrate are designed and found to dissolve LCO with nearly a 100% leaching efficiency at 100 °C within 24 h, which is much higher than the leaching efficiency by DESs in the reported references. The dissolution mechanism investigation shows that the interaction between DESs and LCO is a physical process. This work provides a new strategy for the mild and efficient dissolution of LCO by cheap and green solvents.

中文翻译：

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使用新型深共晶溶剂在低温下溶解锂离子电池阴极的显着改进

钴酸锂 (LCO) 的温和绿色溶解具有高效率具有挑战性。在这里，设计了基于聚（乙二醇）200 和对甲苯磺酸一水合物的新型 DESs 并发现在 100°C 下 24 小时内以接近 100% 的浸出效率溶解 LCO，这远高于 DESs 的浸出效率在报告的参考文献中。溶解机理研究表明DESs和LCO之间的相互作用是一个物理过程。这项工作为通过廉价和绿色溶剂温和有效地溶解 LCO 提供了一种新策略。