Charge storage dynamics and time series analysis of binder free rapidly synthesized copper oxide for supercapacitors

In this work, CuO electrodes were rapidly synthesized using a hydrothermal method for supercapacitors. The effect of precursor concentration on the electrochemical performance was evaluated. The XRD reveals the formation of a monoclinic-structured CuO electrode. Raman studies confirm the synthesis of CuO electrode. The effect of concentration on the growth of petal-like morphology of CuO was observed in SEM. The electrochemistry of the CuO electrode was studied in the three-electrode system. The optimized CuO electrode shows the specific capacitance value of 869.60 mF/cm2 2 (120.77 mu Ah/cm2) 2 ) at 8 mA/cm2 2 current density. The b value is computed using power law, suggesting diffusion-dominant charge storage. The diffusion coefficient for the CuO is found to be 4.39 x 10-6-6 cm2/s. 2 /s. Additionally, time series analysis (TSA) was successfully implemented to predict and forecast the cyclic stability of the CuO electrode. The assembled aqueous asymmetric device reveals the specific capacitance of 43.39 mF/cm2 2 at 3 mA/cm2 2 with 98.76 % cyclic stability for 2,000 cycles.