Fabrication of antimony doped tin oxide nanopowders as an advanced electrode material for supercapacitors

摘要

The antimony doped tin oxide (Sb-SnO2, ATO) nanopowders have been synthesised via a facile co-precipitation method using absolute methanol as a solvent at room temperature and followed by a calcination process. The calcination process of fabricated ATO from precursor is investigated by thermogravimetric analysis (TGA). The crystallite phase and morphological structure of ATO powder are examined by the X-ray diffraction and scanning electron microscopy. ATO material consisting of numerous sphere-like nanoparticles with the diameter of 40-60 nm were further measured by electrochemical workstation, exhibiting the ATO nanostructure is an high-conductivity electrode material with highly reversible features, good specific capacitance and good capacitance retention. The specific capacitance of the ATO electrode material shows 158.2 F g(-1) at current density of 1 A g(-1), and specific capacitance retention remained 72% when the current density increases up to 10 A g(-1), indicating the ATO nanostructures materials can be considered as a promising electrode material for supercapacitors.