Molybdenum doped spinel as cathode material for lithium rechargeable cells

Spinel LiMoxMn2−xO4 (x = 0.01, 0.05, 0.10) samples are synthesized using solid state technique and characterized by thermo gravimetric analysis (TG/DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and galvanostatic cycling studies. Thermal studies depict that the formation of spinel compound proceeds in three stages. XRD peak reflections point out the formation of spinel phase. SEM studies confirm that LiMo0.01Mn1.99O4 calcined at 850 °C are of 1 μm grains. Among the dopant concentrations investigated, LiMo0.01Mn1.99O4 sample shows better cycling characteristics. LiMo0.01Mn1.99O4 spinel delivers a maximum discharge capacity of 66 mA hg–1 during the first cycle corresponding to coulombic efficiency of 84% and exhibits a capacity fade of 0.2 mA hg–1 cycle–1 over the investigated 10 cycles.