关键词: SnO2/C;库仑效应;可逆容量

Abstract: The SnO2/C composite was prepared by a facile low temperature hydrothermal procedure using SnO2 and glucose as raw materials. The pepared SnO/C composite were characterized by SEM, TEM, XRD, TG and electrochemical test system. The results showed that the composite is made up of spherical particles with the diameter of submicron size. The carbon content in the composite is about 1.5 wt;. As the anode active material for Li-ion batteries, the composite show an initial coulombic efficiency up to 52.7; and an initial reversible capacity as high as 753.4 mAh/g, while the bare SnO2 anode only show an initial coulombic efficiency of 39.8; and an initial reversible capacity of 548 mAh/g. The composite also exhibit an improved cycle durability and a stable high rate property. The improved electrochemical performance of the composite could be ascribed to the effect of the introduced-carbon which obtain by a low temperature hydrothermal reaction.