LAUSR

The effect of Sn/Ti ratio on the electrochemical properties of the anode is studied in Sn-doped TiO2 and SnO2–TiO2 nanofibers synthesized using a pilot-scale electrospinning system. Changes in the lattice structure of TiO2 due to the presence of Sn are studied through X-ray diffraction and high-resolution transmission electron microscopy. Lowering of electrochemical potential (vs Li/Li+) is observed alongside the enhanced capacity (400–600 mAh g−1) with increasing Sn content. Formation of SnO2 grain in sample with high Sn content (70 wt%) shows detrimental effect on cycling stability due to severe volume changes during lithiation/delithiation. We show that the relative fraction of TiO2 and SnO2 framework determines whether the composite is high capacity or high stability. In overall, SnO2–TiO2 composite anode with optimized Sn/Ti ratio can be used for high energy density, cycling stability and working potential lithium-ion battery. The relative fraction of TiO2 and SnO2 framework determines whether the composite is high capacity or high stability