Recycling of spent lithium-ion batteries (LIBs) for metal recovery is inevitable because of environmental and resource conservation considerations. Evaluation of the kinetics parameters is crucial for understanding the thermal response of mixed electrode material for the development of the thermal recycling process. In this study, thermal treatment of mixed electrode (anode and cathode) material resulted in an in-situ indigenous carbothermal reduction of cathode material. The thermal response of mixed electrode material was investigated at different heating rates under argon and air atmosphere. Kinetic parameters, such as the activation energy and pre-exponential factor, were evaluated using other kinetic methods. The average activation energy for the thermal dissociation of mixed electrode material under the air atmosphere is estimated as ~ 180 kJ/mol. The activation energy using different kinetic models was calculated. The product layer diffusion model was found to fit with the activation energy of 52.1, 121.4, 125.3, and 71 kJ/mol for Co, Mn, Ni, and Li recovery, respectively. The optimum product of in-situ carbothermic reduction of mixed electrode material at 900 °C, 60 minutes comprises Co, MnO, and Ni (Co: 61.6 pct, Mn: 17.8 pct, Ni: 7.1 pct, O: 13.5 pct) with a saturation magnetization of 102 emu/g.

出于对环境和资源保护的考虑，回收废锂离子电池 (LIB) 用于金属回收是不可避免的。动力学参数的评估对于了解混合电极材料的热响应对于热回收过程的发展至关重要。在这项研究中，混合电极（阳极和阴极）材料的热处理导致原位阴极材料的本地碳热还原。研究了混合电极材料在氩气和空气气氛下在不同升温速率下的热响应。使用其他动力学方法评估动力学参数，例如活化能和指前因子。混合电极材料在空气气氛下热解离的平均活化能估计为~180 kJ/mol。使用不同的动力学模型计算活化能。发现产物层扩散模型与 Co、Mn、Ni 和 Li 回收的活化能分别为 52.1、121.4、125.3 和 71 kJ/mol。原位优化产品 混合电极材料在 900 °C、60 分钟的碳热还原包含 Co、MnO 和 Ni（Co：61.6 pct，Mn：17.8 pct，Ni：7.1 pct，O：13.5 pct），饱和磁化强度为 102 emu/g .