1. Preparation and electrochemical characterization of ultrathin WO3−x /C nanosheets as anode materials in lithium ion batteries
- Author
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Shufang Ji, Yadong Li, Dingsheng Wang, Guangyin Liu, Xie Haiquan, Ye Liqun, Chen Chen, Wutao Mao, and Keyan Bao
- Subjects
Materials science ,Diffusion ,chemistry.chemical_element ,Nanotechnology ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Anode ,Nanomaterials ,Ion ,chemistry ,Electrical resistivity and conductivity ,General Materials Science ,Lithium ,Electrical and Electronic Engineering ,0210 nano-technology ,Current density - Abstract
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.
- Published
- 2016
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