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Preparation and characterization of nanocrystalline SnO2 thin film by electrodeposition technique

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Abstract

A novel process for preparing tin oxide thin films directly on copper foil by electrodeposition was developed. An optimal preparation technology to obtain SnO2 thin 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 SnO2 thin 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 °C for 2 h. Electrochemical characterization shows that SnO2 film can deliver a discharge capacity of 798 mAh/g and the SnO2 film with smooth surface and annealed at 400 °C for 2h has better cycle performance than that with rough surface and annealed at 150 °C for 10 h.

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Correspondence to He Ze-qiang PhD.

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Foundation item: Project(04B016) supported by the Office of Education Hunan Province; projiect(2004107) supported by the Postdoctoral Science Foundation of Central South University

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He, Zq., Li, Xh., Xiong, Lz. et al. Preparation and characterization of nanocrystalline SnO2 thin film by electrodeposition technique. J Cent. South Univ. Technol. 12, 437–442 (2005). https://doi.org/10.1007/s11771-005-0178-7

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  • DOI: https://doi.org/10.1007/s11771-005-0178-7

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