Recovery of cobalt and lithium from spent Li-ion batteries (LIBs) has been studied using ultrasound-assisted leaching. The primary purpose of this work is to investigate the effects of ultrasound on leaching efficiency of cobalt and lithium. The results were compared to conventional leaching. In this study sulfuric acid was used as leaching agent in the presence of hydrogen peroxide. The cathode active materials from spent battery were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) before and after leaching. Effects of leaching time, leaching temperature, H₂SO₄ concentration, H₂O₂ concentration, solid/liquid ratio, and ultrasonic power have been studied. Optimal leaching efficiency of 94.63% for cobalt, and 98.62% for lithium, respectively, was achieved by using 2M H₂SO₄ with 5% (v/v) H₂O₂ at a solid/liquid ratio of 100 g/L, and an ultrasonic power of 360 W, and the leaching time being 30 min under 30°C. Compared with conventional leaching, the ultrasound-assisted leaching gave a higher leaching rate and improved leaching efficiency under the same experimental conditionals. The kinetic analysis of ultrasound-assisted leaching showed that the activation energy of cobalt and lithium were 3.848 KJ/mol and 11.6348 KJ/mol, respectively, indicating that ultrasound-assisted leaching of cobalt and lithium from spent LIBs was controlled by diffusion.

已经研究了使用超声辅助浸出法从废锂离子电池（LIB）中回收钴和锂的方法。这项工作的主要目的是研究超声波对钴和锂的浸出效率的影响。将结果与常规浸出进行比较。在这项研究中，硫酸在过氧化氢的存在下用作浸出剂。在浸出之前和之后，通过X射线衍射（XRD）和扫描电子显微镜（SEM）对来自废电池的正极活性材料进行表征。浸出时间，浸出温度，H ₂ SO ₄浓度，H ₂ O _2的影响已经研究了浓度，固/液比和超声功率。通过使用含5％（v / v）H ₂ O _2的2M H ₂ SO ₄，钴的最佳浸出效率分别为94.63％和锂的最佳浸出效率。固/液比为100 g / L，超声功率为360 W，浸出时间在30°C下为30分钟。与常规浸出相比，超声浸出在相同的实验条件下具有更高的浸出率和更高的浸出效率。超声辅助浸出的动力学分析表明，钴和锂的活化能分别为3.848 KJ / mol和11.6348 KJ / mol，表明超声波辅助从废LIB中浸出钴和锂受扩散控制。