Preparation and Characterization of Ultrafine SnO2 Nanoparticles as Anode Materials in Lithium Ion Batteries

In this work, ultrafine SnO2 nanoparticles were prepared by a facile solvothermal route using SnCl4.5H2O as initial materials. Phase compositions and microstructures of as-prepared have been investigated X-ray diffraction (XRD), scanning electron microscopy (SEM), the particle size analyzer. It was found that obtained with good dispersibility exhibited pure rutile structural phase an average crystal grain 7.4 nm. The electrochemical performance characterized cyclic voltammetry, galvanostatic cycling, impedance spectroscopy (EIS). cycling results at current density 100 mAh.g-1 showed possess high specific discharge capacity 1379 mAh∙g-1 Coulombic efficiency 57% first cycle, over 91% after 5th 276 maintained during 50th cycle discharge/charge. Despite relatively low stability, effectve electrode due to its nanostructure expanded active regions promoted reversible process lithium insertion/extraction.