Improved Electrochemical Performances of Carbon-coated Li2MoO3 Cathode Materials for Li-ion Batteries

Layer-structured oxide Li2MoO3 was surface modified via a facile ball-milling followed by heat treatment to obtain carbon-coated materials with enhanced electrochemical performances. The samples were characterized through XRD, SEM, TEM, Raman spectroscopy, charge-discharge and EIS measurements. The structural and morphological characterization confirmed that Li2MoO3 particles were successfully covered with nano-sized carbon layer, and the coating of carbon had no obvious effect on the crystal structure of Li2MoO3. Charge-discharge tests demonstrated that the carbon-coated materials presented improved reversible capacities, cyclability and rate capability compared to the pristineLi(2)MoO(3). EIS results revealed the enhanced electrochemical performances would contribute to the carbon coating layer, which could decrease the charge transfer resistance upon cycling.