Preparation and characterization of nanocrystalline SnO2thin film by electrodeposition technique①
来源期刊：中南大学学报(英文版)2005年第4期
论文作者：何则强 李新海 熊利芝 麻明友 吴显明 肖卓炳 刘文萍
文章页码：437 - 442
Key words：tin oxide; film; electrodeposition; lithium ion battery; electrochemical properties
Abstract: A novel process for preparing tin oxide thin films directly on copper foil by electrodeposition was developed. An optimal preparation technology to obtain SnO2thin films was proposed with current density of 8 mA/cm2,the time of deposition of 120 min, the concentration of tin dichloride of 0.02 mol/L and the concentration of dissociated acid of 0.03 mol/L. The phase identification, microstructure and morphology of the thin films were investigated by thermogravimetric analysis and differential thermal analysis, X-ray diffraction, Fourier transform infrared spectra,scanning electron microscopy and transmission electron microscopy. The as-deposited thin film was composed of SnO2·xH2O was obtained by drying at room temperature. Nanocrystalline SnO2thin film having tetragonal structure with average grain size in the range of 8 to 20 nm and porous, uniform surface was obtained by heat-treating the as-deposited film at 400℃for 2 h. Electrochemical characterization shows that SnO2film can deliver a discharge capacity of 798 mAh/g and the SnO2film with smooth surface and annealed at 400℃for 2 h has better cycle performance than that with rough surface and annealed at 150℃for 10 h.
