Waste lithium-ion batteries are massively piling up because of ever-increasing consumption. Environmental considerations, limited life cycle, and the presence of lithium, cobalt, manganese, and nickel are the driving forces for recycling. In this study, an active cathode material (LiCoO₂, LiNi_0.5Mn_1.5O₄, LiMn₂O₄) was reduced in a muffle furnace and microwave unit with varying graphite dosages and times, and the Box–Behnken statistical design was pursued for the optimization of reduction parameters. The composition of the magnetic fraction of a muffle furnace reduction at an optimum condition is cobalt 68%, manganese ~ 21%, and nickel ~ 2.5% with a saturation magnetization of ~ 106 emu/g and lithium extraction of ~ 83%. The composition of the magnetic fraction of microwave reduction at optimum condition is cobalt 72%, manganese ~ 9% and nickel ~ 6% with a saturation magnetization value of ~ 90.7 emu/g and lithium extraction of ~ 82%. The muffle furnace route offers a higher magnetic yield and saturation magnetization compared to the microwave route.

由于消耗不断增加，废旧锂离子电池正在大量堆积。环境因素，有限的生命周期以及锂，钴，锰和镍的存在是回收的驱动力。在这项研究中，活性阴极材料（LiCoO ₂，LiNi _0.5 Mn _1.5 O ₄，LiMn ₂ O ₄）在马弗炉和微波装置中以不同的石墨剂量和时间进行还原，并且采用Box–Behnken统计设计来优化还原参数。在最佳条件下，马弗炉还原的磁性部分的组成为钴68％，锰〜21％和镍〜2.5％，饱和磁化强度约为106 emu / g，锂的提取率为83％。在最佳条件下，微波还原的磁性部分的组成为钴72％，锰〜9％和镍〜6％，饱和磁化值为〜90.7 emu / g，锂的提取率为〜82％。与微波路径相比，马弗炉路径具有更高的磁性和饱和磁化强度。