Design and Construction of rGO/NiMoO4 and FeOCl/BiOCl Utilised as a Positive and Negative Electrode for Asymmetric Capacitance

In this work, the construction of 2D nanostructures of rGO/NiMoO 4 and FeOCl/BiOCl-based positive and negative electrode materials for asymmetric capacitor devices. Initially, the positive and negative electrodes were investigated through the three electrode systems. The FeOCl/BiOCl electrode was used in the negative potential region of − 0.6 V to 0 V and the rGO/NiMoO 4 electrode was used in the positive potential region (0–0.4 V) also these electrode materials exhibit excellent capacitance values of 228 F/g and 424 F/g calibrated at 1 A/g for negative and positive electrodes, respectively. Moreover, the assembled asymmetric capacitor device showed pseudocapacitance behaviour, high capacitance values of 196 F/g at 1 A/g and good cyclic stability of 92% from its initial capacitance value at 10 A/g. Also, the ASC device showed higher energy density and power density values of 49 Wh/kg and 1.031 kW/kg at 1 A/g.