Regeneration of LiNi0.6Co0.2Mn0.2O2 material from spent lithium-ion batteries by solution combustion synthesis method

Abstract

LiNi0.6Co0.2Mn0.2O2 (NCM622) material was regenerated by solution combustion synthesis method using metal precursors obtained from the spent lithium-ion batteries. The structural, microstructural, and electrochemical properties of the regenerated cathode material were evaluated as a function of fuel type including citric acid, polyvinylpyrrolidone (PVP), cetyltrimethylammonium bromide (CTAB), and a mixture of CTAB and PVP fuels. The mixed CTAB-PVP fuel led to the layered crystal structure and porous microstructure with high specific surface area and pore volume. The regenerated cathode powders prepared by a mixture of CTAB and PVP fuels had a specific capacity of 156 mAh g−1 at 0.1C with a capacity retention of 94 % following 100 charge/discharge cycling at a current rate of 0.5C.