SnO2 sheet/graphite composite as anode material with improved electrochemical performance for lithium-ion batteries

The SnO2 sheet/graphite composite was synthesized by a hydrothermal method for high-capacity lithium storage. The microstructures of products were characterized by XRD and FE-SEM. The electrochemical performance of SnO2 sheet/graphite composite was measured by galvanostatic charge/discharge cycling and EIS. The first discharge and charge capacities are 1,072 and 735 mAh g−1 with coulombic efficiency of 68.6 %. After 40 cycles, the reversible discharge capacity is still maintained at 477 mAh g−1. The results show that the SnO2 sheet/graphite composite displays superior Li-battery performance with large reversible capacity and good cyclic performance.