One pot synthesis of poly m-toluidine incorporated silver and silver oxide nanocomposite as a promising electrode for supercapacitor devices.

The design and fabrication of novel electrodes with strong electrochemical responses are crucial in advanced supercapacitor technology. In this study, a poly(m-toluidine)/silver-silver oxide (PMT/Ag-Ag₂O) nanocomposite was prepared using the photopolymerization method. Various characterization techniques were employed to analyze the prepared nanomaterials. The resulting structure of Ag-Ag₂O minimizes ion diffusion distances, increases active sites, and accelerates redox reactions. The electrochemical response of PMT and PMT/Ag-Ag₂O electrodes was evaluated in three different electrolyte solutions (Na₂SO₄, H₂SO₄, and HCl). The specific capacitance of PMT/Ag-Ag₂O nanocomposite was found to be higher than that of PMT alone. Among the tested electrolytes, HCl exhibited the highest specific capacitance of 443 F g^-1 at a gravimetric current density of 0.4 A g^-1, surpassing H₂SO₄ (104 F g^-1) and Na₂SO₄ (32 F g^-1). Also, the PMT/Ag-Ag₂O nanocomposite has demonstrated good cycling stability. It exhibited a high specific power density of 156 W Kg^-1 and a specific energy density of 1.8 Wh Kg^-1. These results highlight the potential of the prepared PMT/Ag-Ag₂O nanocomposite as a nanoelectrode material for high-performance supercapacitors.