Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Synthesis of MWCNTs/Activated Carbon-Based Supercapacitor Electrode Composite and Analysis Using a Three-Electrode System with Various Electrolyte Concentrations

Version 1 : Received: 17 May 2023 / Approved: 17 May 2023 / Online: 17 May 2023 (14:11:29 CEST)

How to cite: Subagio, A.; Taufiq, H.R.; Sutanto, H.; Diantoro, M.; Luthfiyah, I.; Purwanto, A.; Meevasana, W. Synthesis of MWCNTs/Activated Carbon-Based Supercapacitor Electrode Composite and Analysis Using a Three-Electrode System with Various Electrolyte Concentrations. Preprints 2023, 2023051253. https://doi.org/10.20944/preprints202305.1253.v1 Subagio, A.; Taufiq, H.R.; Sutanto, H.; Diantoro, M.; Luthfiyah, I.; Purwanto, A.; Meevasana, W. Synthesis of MWCNTs/Activated Carbon-Based Supercapacitor Electrode Composite and Analysis Using a Three-Electrode System with Various Electrolyte Concentrations. Preprints 2023, 2023051253. https://doi.org/10.20944/preprints202305.1253.v1

Abstract

Along with the rapid development of technology and industry, the need for energy storage has become fundamental. One promising energy storage devices is the supercapacitor. Several type supercapacitors are available, one of which is the electrical double-layer capacitor made from carbon graphite and multiwalled carbon nanotubes (MWCNTs). In this study, we combined these two materials into a working electrode in a three-electrode system. In the morphological analysis using scanning electron microscope, transmission electron microscope, and X-ray diffraction, the two materials were found to have formed a composite on the surface. In the electrochemical analysis, two types of testing were conducted using cyclic voltammetry and electrochemical impedance spectroscopy. Electrochemical analysis was carried out on five electrolyte concentrations of Na2SO4 from 1 to 6 M. The capacitance produced at concentrations of 1, 2, 3, 4, and 5 M were 34.395, 35.808, 46.284, 49.502, and 76.815 F/g, respectively. At an electrolyte concentration of 5 M Na2SO4, an energy density of 27.312 Wh/Kg and a power density of 343.786 W/Kg were produced. Meanwhile on concentration of 6 M, the surface of the electrode was damaged.

Keywords

supercapacitor; MWCNTs; activated carbon; Na2SO4; electrolyte concentration

Subject

Chemistry and Materials Science, Electrochemistry

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