Synthesis and Characterization of Manganese dioxide Agglomerated Nanoparticles for Supercapacitor Application

Manganese dioxide (MnO₂) nanoflakes were effectively produced at ambient temperature using a solution technique. The SEM, XRD, BET, and electrochemical tests were used to investigate the characteristics of the produced materials (MnO₂). The XRD pattern of the manganese oxide sample obtained reveals that it possesses crystal structure. The morphology was examined using a scanning electron microscope image, which confirmed the development of nanoflakes in the 70-100 nm diameter range. The higher specific capacitance achieves 200 Fg^-1 at current density and at scan rate of 0.5 A/g and 5 mv/s respectively. For the highest specific capacitance, the obtained value of power density and energy density are of 257.14 w/kg and 25 w.h/kg respectively.