Electrolyte recovery from spent Lithium-Ion batteries using a low temperature thermal treatment process

• Separation and recovery of electrolyte spent EV Lithium-Ion batteries. Optimum process temperature time determined to be 130°C for 80 minutes. On-line exhaust gas analysis by In-Situ FT-IR. Toxic LiPF 6 decomposition products HF POF 3 detected. Electrolyte is seldomly considered in state-of-art battery recycling methods but rather evaporates decomposes uncontrolled during the pre-treatment steps. However, controlled safe removal inevitable high importance industry minimize environmental impact processes preventing severe threats produced inflammable, toxic hazardous components electrolyte. This study investigated effects a low thermal treatment on recovery. The gases recovered were analyzed Fourier-transform infrared spectroscopy (FT-IR) chromatography-mass spectrometry (GC-MS) determine effectiveness significant parameters. results show that solvents, which are dimethyl carbonate (DMC), ethyl methyl (EMC), ethylene (EC), successfully minutes processing at 130°C. hydrogen fluoride (HF) phosphoryl (POF ) detected stream as acidic solutions. Thermal below 150°C promising approach solvents prior metal stage due its simplicity, feasibility, benefit.