Preparation and electrochemical characterization of ultrathin WO3 x/C nanosheets as anode materials in lithium ion batteries
Ultrathin two dimensional (2D) nanomaterials offer unique advantages compared to their counterparts in other dimensionalities. O vacancies in such materials allow rapid electron diffusion. Carbon doping often improves the electric conductivity. Considering these merits, the WO3 x/C ultrathin 2D nanomaterial is expected to exhibit excellent electrochemical performance in Li ion batteries. Here, ultrathin WO3 x/C nanosheets were prepared via an acid assisted one pot process. The as prepared WO3 x/C ultrathin nanosheets showed good electrochemical performance, with an initial discharge capacity of 1,866 mA*h*g 1 at a current density of 200 mA*g 1. After 100 cycles, the discharge and charge capacities were 662 and 661 mA*h*g 1, respectively. The reversible capacity of the WO3 x/C ultrathin nanosheets exceeded those of WO3 and WO3 x nanosheets. The electrochemical testing results demonstrated that WO3 x/C ultrathin nanosheets are promising alternative anode materials for Li ion batteries.
Nano Research