Preparation WO3–x/C Nanosheets via an Acid-Assisted One-Pot Process and Electrochemical Characterization

WO3-x/C nanosheets were prepared via an acid-assisted one-pot process. 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 nanosheets are expected to exhibit excellent electrochemical performance in Li-ion batteries. The as-prepared WO3-x/C nanosheets showed good electrochemical performance, with an initial discharge capacity of 1,273 mA . h . g(-1) at a current density of 200 mA . g(-1). After 100 cycles, the discharge and charge capacities were 638 and 636 mA . h . g(-1), respectively.