Electrochemical Characterisation of Sol-Gel Derived SnO2 for Supercapacitor Application

Abstract

Pseudocapacitive properties of SnO2 and Sb-doped SnO2 were determined in 0.5 mol dm-3 KCl solution. The samples were prepared by sol-gel method and analysed by X-ray powder diffraction (XRPD) and field emission scanning electron microscopy (FE SEM). Rietveld refinement of XRPD data showed the changes in unit cell parameters due to the incorporation of Sb 3+ into the host SnO2 lattice, while FE SEM pointed out the differences in morphology caused by doping. Specific capacitance values of 3.67 and 6.89 F g-1 were obtained for SnO2 and Sbdoped SnO2, respectively. Reaction mechanism of SnO2 that corresponds to the obtained mass change was proposed. It was shown that redox reactions of SnO2 and Sb-doped SnO2 are dependent on structural changes since different mass change properties were obtained in comparison to the previous reports carried out for other metal oxides.

2D flakes of Au decorated SnO2 nanoparticles as electrode material for high performing supercapacitor

“…Although the capacitance value of SnO 2 is much less compared to other metal oxides, few recent reports have suggested usefulness of SnO 2 as an electrode material for supercapacitors [22,23]. For example, Roković et al worked on the pseudocapacitive properties of SnO 2 and Sb-doped SnO 2 [24]. Another work by Bonu et al reported the electrochemical performance of quantum dot SnO 2 [25].…”