Various Low Magnetic Field Effect on Electrochemical Performance of Asymmetric Supercapacitor MnO2- Carbon-Based Composites

• Published in: Materials science forum Vol. 1080; pp. 99 - 105
• Main Authors: Zulaikah, Siti, Subagio, Agus, Al Fath, Yusril, Nasikhudin, Nasikhudin, Osman, Zurina, Diantoro, Markus, Suprayogi, Thathit, Istiqomah, Istiqomah
• Format: Journal Article
• Language: English
• Published: Trans Tech Publications Ltd 30.01.2023
• Subjects: MnO2; Carbon; Magnetic Field; Asymmetric Supercapacitor
• ISSN: 0255-5476; 1662-9752; 1662-9752
• DOI: 10.4028/p-l96ngv

Application of energy storage systems such as supercapacitors can not be separated from the magnetic fields effect. In the last decade, it’s rare to find research reports about various low magnetic field effects on supercapacitor performance. Asymmetric supercapacitors based on MnO2-Carbon were made to analyze its electrochemical performance changes by magnetic field in 0-50 mT. Magnetic field was applied in flow direction from cathode (MnO2-C) to anode (C) during electrochemical performance test using Galvanostatic Charge-Discharge (C-D) instrument. The electrochemical performance was increasing in charging (91%) and discharging (22%) time of asymmetric supercapacitors. Impressively, the 50 mT magnetic field showed a high specific capacitance of 61.9 F/g at 0.1 A/g. The supercapacitor system delivers specific energy (17.8 Wh/kg), specific power density (329.72 W/kg), and outstanding stability (79% in 50 cycles). The electrochemical improvement by magnetic field indicates a highly promising application of this method in future supercapacitor devices.