One-step synthesis and electrochemical behavior of LiMnO2 and its composite from MnO2 in the presence of glucose

LiMnO2 and 0.23Li2MnO3·0.77LiMnO2 were prepared by a convenient one-step solid-state reaction from MnO2 using glucose as organic carbon resource. The crystal structure and morphology of the as-prepared materials was examined by X-ray powder diffraction and field emission scanning electron microscopy, respectively. The ration of Li to Mn was determined by means of atomic absorption spectrometry and the Li/Mn molar ratio in the products was 1.23. The electrochemical properties were investigated by charge–discharge test and electrochemical impedance measurements. The prepared composite material presented an initial discharge capacity of 45 mAh g–1 and a good cycling performance with reversible capacity of 218 mAh g–1 after 30 cycles. On the basis of the experimental results, the discharge efficiency of this composite material more than 100% was also discussed.