Designing and simulating of NiO@Graphite asymmetric supercapacitor device using thermally optimized nickel oxide electrode

In this manuscript, we have produced nickel oxide thin films by facetious spray pyrolysis method at different deposition temperatures for the supercapacitor application. The impact of physical properties and chemical compositions of the prepared electrodes is also studied in this manuscript. Among all prepared samples, AT-2 (with deposition temperature 375 °C) is found to be the finest electrode for supercapacitor execution with an excellent specific capacitance of 256.52 Fg−1 at 0.002-V scan rate by cyclic voltammetry. The same electrode shows a specific capacitance of 18.60 Fg−1 by GCD analysis and parades an energy density of 36.47 Whkg−1 with a power density of 9.91 Wkg−1 at 0.001-A current density. The synthesized NiO@AT-2 electrode shows 78