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Electrochemical Characterisation of Sol-Gel Derived SnO2 for Supercapacitor Application

Marijana Kraljić Roković ; Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, HR-10000 Zagreb, Croatia
Gabrijela Ljubek ; Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia
Mark Žic ; Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
Jasminka Popović ; Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia

Puni tekst: engleski pdf 6.657 Kb

str. 289-295

preuzimanja: 1.220



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 Sb-doped 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.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi

SnO<sub>2</sub>; Sb-doped SnO<sub>2</sub>; supercapacitors; cyclic voltammetry; electrochemical quartz crystal nanobalance

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