Novel Method of Preparation of C/Sn-SnO2 Nanocomposite Li-ion Anode Material Derived from Plant Polysaccharides

C/Sn-SnO2 nanocomposite was obtained in one step pyrolysis and carboreduction process, providing formation of tin-based nanograins encapsulated in carbon buffer matrix derived from plant polysaccharide (potato starch). Electrical conductivity of the obtained material was carried out within temperature range -20÷40 ˚C. Cyclic voltammetry (CV) and charge-discharge tests were performed in Li/Li+/(C/Sn-SnO2) R2032-type coin cells within 0.02÷1.5 V potential range. Furthermore, electrochemical impedance spectroscopy (EIS) was used to characterize electrochemical properties of the nanocomposite. The C/Sn-SnO2 anode material provided at least 538 mAh g-1 at C/20–rate and revealed good coulombic efficiency and capacity retention in charge-discharge cell tests.