Synthesis of LiMnO2 porous microsphere and its electrochemical behaviour as cathode material in lithium-ion batteries

Orthorhombic LiMnO2 porous microspheres with the pore size of 200-500 nm were synthesised by Mn2O3 precursor and LiOH center dot H2O at 750 degrees C for 5 h. Field-emitting scanning electron microscope images show the obtained products basically preserve the initial morphology of Mn2O3 precursor. The electrochemical tests of the as-obtained LiMnO2 presented the maximum discharge capacity of 163 mAh/g at the 11th cycle, and remained above 143 mAh/g after 30 cycles at a current density of 30 mA/g, corresponding to a capacity fading of similar to 12.1%. For comparative purpose, the LiMnO2 nanoparticles prepared with the Li2CO3 substituted for LiOH center dot H2O as the lithium source were studied, which showed their maximum discharge capacity was only 153 mAh/g, together with a capacity of 136 mAh/g after 30 cycles at the same current density.