Electrochemical performance of SnO2/C nanocomposites as anode materials for lithium-ion batteries.

Carbon-coated SnO₂ nanocomposites were synthesized successfully by the hydrothermal method and carbonization at 500 °C with glucose and SnCl₂·2H₂O as precursor materials. The SnO₂/C nanocomposites were characterized by various techniques such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), Raman spectra, and electrochemical analyses. It was demonstrated that SnO₂/C-0, SnO₂/C-5, SnO₂/C-15, SnO₂/C-30, and SnO₂/C-50 had initial discharge capacities of 1359.2, 1626.8, 2124.9, 1525.8, and 1349.4 mAhg⁻¹, respectively. In particular, the SnO₂/C-15 sample exhibited excellent high reversible lithium storage capacity, good rate capability, and cycling stability. The electrodes show a long cycling ability and high charge/discharge capacity due to the presence of carbon. [ABSTRACT FROM AUTHOR]