Development of nano-spherical RuO2 active material on \AISI\ 317 steel substrate via pulse electrodeposition for supercapacitors

By R. Arunachalam and R.M. Gnanamuthu and Mahmoud Al Ahmad and S. Mohan and R. Pavul Raj and J. Maharaja and Nedal Al Taradeh and Ashraf Al-Hinai
Published in Surface and Coatings Technology NULL 2015

Abstract

The goal of the present study is to develop a thin film hydrous ruthenium oxide (RuO2) electrode material on Ni flashed \AISI\ 317 stainless steel (SS) substrate by pulse electrodeposition (PED) technique for application in supercapacitors. The nickel (Ni) strike thin film is deposited prior to RuO2 in order to improve the adhesion of the active material on the \SS\ substrate. The prepared RuO2 active material on Ni strike \SS\ electrode is characterized using XRD, \SEM\ with \EDAX\ and electrochemically using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using an \IVIUM\ reference potentiostat. The surface morphologies of the thin film (thickness of 2.3 ?m) active materials are nano-spherical shaped and the particles are arranged uniformly without cracks on the \SS\ substrate. The electrochemical impedance and \CV\ profile demonstrates its superior characteristics in the electrochemical system. Moreover, the specific capacitance of RuO2 value is approximately 520 F g? 1 at the scan rate of 1 mV s? 1 and it's indicating a better utilization of active species in supercapacitors.

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