Quantum capacitance of multi-layered 2D iodine for supercapacitor electrode

Abstract In recent decades, the utilization of energy storage devices has been at its peak. A supercapacitor is superior to a battery because it has a quick charge-discharge rate and great energy storage capacity. Because of the lack of quantum capacitance, the overall capacitance in the supercapacitor is lower. In this study, we aimed to increase the quantum capacitance of the total capacitance of 2D iodine. For this, we work on 2D iodine from 1 layer to 5 layer and determine its quantum capacitance (C Q ) to boost the supercapacitor qualities. Our research reveals that the C Q is rising with the increase of layers. The quantum capacitance of 1 layer is 406.64 μF/cm 2 rising linearly to 1732.17 μF/cm 2 for 5 layer. The charge storage on the cathode side is more significant than on the anode side, which shows that Iodinene functions as a cathode electrode in a supercapacitor.