Nanocrystalline tin oxide electrodeposited on carbon nanotube for high performance electrochemical capacitive energy storage

In this work, 3D nanoporous composite electrode with tin oxide nanoparticles of 3-5 nm dispersed uniformly on the surface of multiwalled carbon nanotube film was prepared by electrodeposition technique. This composite electrode presents high specific capacitance (588 Fg^-1 at 15 Ag^-1), excellent rate capability (450 Fg^-1 at a high scan rate of 200 mVs^-1) and good cycle stability (5% capacity loss after 5000 cycles at 15 Ag^-1). This result indicates that the nanostructured composite electrode with hierarchical porous structure and good conductivity is a very promising structure and active composite material for electrochemical capacitor.