Synthesis of MoO2 nanosheets by an ionic liquid route and its electrochemical properties

MoO2 nanosheets were synthesized for the first time by a solvothermal route using an ionic liquid in the reaction system. The synthesized nanocomposites were characterized by XRD, FTIR, SEM, and TEM measurements. It was found that the ionic liquid composed of ethylene glycol and choline chloride (ChCl) acted as a solvent and a reactive reagent during the reaction process. Based on a series of experimental results, the formation mechanism of nanosheets was also discussed. Furthermore, MoO2 nanosheets were used as anode materials for Li-ion intercalation and exhibited large reversible capacity, high rate performance and good cycling stability. For instance, a high reversible capacity of 620 mA h g(-1) can be remained after 20 cycles at 100 mA g(-1). This might be contributed to the intrinsic characteristics of MoO2 nanosheets, which offered a shorter path for Li+ and electron transport, leading to the improved capacity and enhanced rate capability. (C) 2013 Elsevier B.V. All rights reserved.