Abstract

Microwave-assisted leaching of valuable metals of cobalt (Co), lithium (Li), and manganese (Mn) from cathode powder of spent lithium-ion batteries (LIBs) was investigated. Higher leaching efficiency of Co, Li, and Mn was found using ascorbic acid than hydrochloric acid (HCl). The leaching reaction was rapid (5 min) and effective (100%) for Co, Li, and Mn using 0.5 N of ascorbic acid of solid-to-liquid ratio (S/L) of 10 g/L, at microwave power of 300 W. The efficiency decreased to 52.19%, 59.23%, and 57.98% for Co, Li, and Mn, respectively, as solid concentration increased to 40 g/L. Both pseudo-first-order and pseudo-second-order models described the reaction kinetics well. The conventional leaching using 0.5 N of ascorbic acid at 65 °C required 90 min to reach > 95% leaching efficiency for Co, Li, and Mn. Compared with conventional leaching, microwave irradiation accelerates yet enhances the leaching process of valuable metals from spent LIBs.

Graphical Abstract

中文翻译：

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使用有机酸和无机酸微波辐射从废锂离子电池中快速浸出有价值的金属

摘要

研究了微波辅助从废锂离子电池（LIBs）阴极粉末中浸出钴（Co），锂（Li）和锰（Mn）的有价金属的方法。发现使用抗坏血酸比盐酸（HCl）具有更高的Co，Li和Mn浸出效率。使用0.5 N的固液比（S / L）的抗坏血酸，浸出反应快速（5分钟），对Co，Li和Mn有效（100％）。）在300 W的微波功率下为10 g / L）。随着固体浓度增加到40 g / L，Co，Li和Mn的效率分别降至52.19％，59.23％和57.98％。伪一级模型和伪二级模型都很好地描述了反应动力学。在65°C下使用0.5 N抗坏血酸进行常规浸提需要90分钟，以实现Co，Li和Mn的> 95％浸出效率。与传统浸提相比，微波辐照加速了，但仍增强了从废LIB中浸提有价值金属的过程。

图形概要