Synthesis and Characterization of MnWO 4 -CNT for Supercapacitor Applications

Mohammad Bagher Askari (), Fatemeh Jamali, Mohammad Taghi Tourchi Moghadam, Sadegh Azizi and Majid Seifi ()
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Mohammad Bagher Askari: Department of Semiconductor, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman P.O. Box 76318-85356, Iran
Fatemeh Jamali: Department of Physics, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran
Mohammad Taghi Tourchi Moghadam: Department of Physics, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran
Sadegh Azizi: Department of Physics, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran
Majid Seifi: Department of Physics, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran

Sustainability, 2023, vol. 15, issue 20, 1-12

Abstract: This study reveals, for the first time, the excellent capability of MnWO 4 -CNT as a supercapacitor electrode compared to MnWO 4 . In previous research conducted on this compound, RGO was used to enhance its electrochemical properties. The objective of this study is to investigate the effects of CNT on the electrochemical properties of the compound, which also yielded promising results. The physical and morphological analysis of MnWO 4 and MnWO 4 -CNT was conducted using Raman, XRD, BET, and SEM-EDX techniques. The electrochemical performance of the samples was assessed through cyclic voltammetry (CV), impedance electrochemical spectroscopy (EIS), and galvanostatic charge–discharge (GCD). Notably, MnWO 4 -CNT exhibited a significant specific capacitance of 1849.14 F·g −1 at a scan rate of 10 mV·s −1 . The stability evaluation of the samples demonstrated a high capacitance retention of 81.2% and 89.4% for MnWO 4 and MnWO 4 -CNT, respectively. The substantial specific capacity, along with the favorable stability of MnWO 4 -CNT, positions it as a highly promising material for utilization in supercapacitor electrodes.

Keywords: MnWO 4; CNT; supercapacitor; hydrothermal (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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