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

Abstract

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.