Recovery of Graphite and Cathode Active Materials from Spent Lithium-Ion Batteries by Applying Two Pretreatment Methods and Flotation Combined with a Rapid Analysis Technique

This work investigates the comprehensive recycling of graphite and cathode active materials (LiNi0.6Mn0.2Co0.2O2, abbreviated as NMC) from spent lithium-ion batteries via pretreatment flotation. Specific analytical methods (SPME-GC-MS Py-GC-MS) were utilized to identify trace relevant influencing factors. Two different methods, which are Fenton oxidation roasting, investigated with respect their influence on flotation effectiveness. As a result, for NMC materials, recovery 90% maximum grade 83% obtained by optimized roasting Meanwhile, 77% in froth product was achieved, 75%. By using SPME-GC-MS Py-GC-MS analyses, it could be shown that, an process, effective destruction/removal electrolyte binder residues can reached. The applied tools integrated into workflow, enabled process control terms sufficiency achievable separation subsequent