Figure 7.

Anode performance of the as-prepared V2O5-based nanocomposites with 15 wt% SnO2: a charge–discharge tests at the current density of 350 mA g−1 in the potential window of 0.01–3 V; b capacity versus cycle number for V2O5–SnO2 double-shelled nanocapsules at the 350 mA g−1 rate

Liu and Xue Nanoscale Research Letters 2010 5:1525-1534   doi:10.1007/s11671-010-9728-5