Sonochemical synthesis of terbium tungstate for developing high power supercapacitors with enhanced energy densities

Ali Sobhani-Nasab; Mehdi Rahimi-Nasrabadi; Hamid Reza Naderi; Vafa Pourmohamadian; Farhad Ahmadi; Mohammad Reza Ganjali; Hermann Ehrlich

doi:10.1016/j.ultsonch.2018.03.011

Sonochemical synthesis of terbium tungstate for developing high power supercapacitors with enhanced energy densities

Ultrason Sonochem. 2018 Jul:45:189-196. doi: 10.1016/j.ultsonch.2018.03.011. Epub 2018 Mar 26.

Authors

Ali Sobhani-Nasab¹, Mehdi Rahimi-Nasrabadi², Hamid Reza Naderi³, Vafa Pourmohamadian⁴, Farhad Ahmadi⁵, Mohammad Reza Ganjali⁶, Hermann Ehrlich⁷

Affiliations

¹ Young Researchers and Elite Club, Arak Branch, Islamic Azad University, Arak, Iran.
² Chemical Injuries Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran; Faculty of Pharmacy, Baqiyatallah University of Medical Sciences, Tehran, Iran. Electronic address: rahimi@bmsu.ac.ir.
³ Center of Excellence in Electrochemistry, University of Tehran, Tehran, Iran.
⁴ Department of Chemistry, Payame Noor University, Tehran, Iran.
⁵ Department of Medicinal Chemistry, School of Pharmacy-International Campus, University of Medical Sciences, Tehran, Iran.
⁶ Center of Excellence in Electrochemistry, University of Tehran, Tehran, Iran; Biosensor Research Centre, Endocrinology & Metabolism Molecular and Cellular Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
⁷ Institute of Experimental Physics, TU Bergakademie, Freiberg, Germany.

PMID: 29705312
DOI: 10.1016/j.ultsonch.2018.03.011

Abstract

Sonochemically prepared nanoparticles of terbium tungstate (TWNPs) were evaluated through scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy, and the optimal products were further characterized in terms of their electrochemical properties using conventional and continuous cyclic voltammetry (CV, and CCV), galvanostatic charge/discharge technique, and electrochemical impedance spectroscopy (EIS). The CV studies indicated the TWNPs to have specific capacitance (SC) values of 336 and 205 F g^-1 at 1 and 200 mV s^-1, and galvanostatic charge-discharge tests revealed the SC of the TWNP-based electrodes to be 300 F g^-1 at 1 Ag^-1. Also continuous cyclic voltammetry evaluations proved the sample as having a capacitance retention value of 95.3% after applying 4000 potential cycles. In the light of the results TWNPs were concluded as favorable electrode materials for use in hybrid vehicle systems.

Keywords: Nanoparticles; Sonochemical route; Supercapacitor; Tb(2)(WO(4))(3).