Supercapacitors are environmentally sustainable energy storage devices that have attracted significantly attention due to their excellent performance. In this research, supercapacitor electrode materials were prepared from tilapia scales waste biomass with varying concentrations of KOH as a chemical activator, namely 0.1 M, 0.2 M, and 0.3 M with sample codes SI-01, SI-02 and SI-03, respectively…