The electrochemical performances of the carbon-supported
SnO2 nanowire arrays as anode material for lithium ion batteries
are subsequently investigated. For comparison, non-supported
SnO2 nanowire arrays were also prepared by annealing the
composite of SnCl2 Á 2H2O and mesoporous carbon at 500 _ C for
5 h in air to remove the carbon template completely.a shows
the galvanostatic discharge-charge voltage curves of the non-
supported SnO2 nanowire arrays for the first, the second and the
sixtieth cycles at a constant current density of 160 mA gÀ1 within a
cut-off voltage window of 0.01–1.2 V. Two obvious slope regions
can be observed in the first discharge process with a high initial
capacity of 1983 mA h gÀ1, which is mainly attributed to the
reduction of SnO2 to Sn. In addition, the unique structure of the
SnO2 nanowire arrays with mesoporous interspaces provides large
amount of reactive sites and interface between active materials
and the electrolyte, making the Li+ diffusion and charge transport