engleski

Electrochemical characterisation of sol-gel derived SnO2 for supercapacitor application

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 Sb3+ 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.

SnO2 ; Sb-doped SnO2 ; supercapacitors ; cyclic voltammetry ; electrochemical quartz crystal nanobalance

Glavni autor: Marijana Kraljić Roković