Development of Fe2O3 heterostructures anchored on 2D g-C3N4 composite electrode materials for supercapacitor activities

Herein, we have studied fabricating high-performance based supercapacitors (SCs) using ferrite (Fe₂O₃) heterostructures which are anchored on two-dimensional graphitic nitrite (g-C₃N₄) via simple and low-cost chemical method for energy storage application. In this work, the Fe₂O₃, g-C₃N₄, and g-C₃N₄/Fe₂O₃ composites were characterized using various physico-chemical techniques to analyze their crystal structures, stretching/bending vibrations, surface morphology, specific surface area, and the presence of the different electronic states, respectively. As a result, the prepared g-C₃N₄/Fe₂O₃ composite exhibited a high specific capacitance and capacity of 1143 F/g and 254 mAh/g at a current density of 5 mA/cm² over other electrodes. However, the fabricated device reveals the maximum energy density of 33 Wh/kg and the power density of 3200 W/kg with superior electrochemical stability of 89 % over 5000 cycles. Based on the above results, the prepared g-C₃N₄/Fe₂O₃ composites showed better flexibility, high supercapacitive performance, and a long lifetime stability. Therefore, this research opens up an exciting possibilities for developing advanced supercapacitor activities.