One pot synthesis of poly m-toluidine incorporated silver and silver oxide nanocomposite as a promising electrode for supercapacitor devices
Doaa Essam, Ashour M. Ahmed, Ahmed A. Abdel‐Khaliek, Mohamed Shaban, Mohamed Rabia
Abstract
Abstract 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-Ag 2 O) nanocomposite was prepared using the photopolymerization method. Various characterization techniques were employed to analyze the prepared nanomaterials. The resulting structure of Ag-Ag 2 O minimizes ion diffusion distances, increases active sites, and accelerates redox reactions. The electrochemical response of PMT and PMT/Ag-Ag 2 O electrodes was evaluated in three different electrolyte solutions (Na 2 SO 4 , H 2 SO 4 , and HCl). The specific capacitance of PMT/Ag-Ag 2 O 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 H 2 SO 4 (104 F g −1 ) and Na 2 SO 4 (32 F g −1 ). Also, the PMT/Ag-Ag 2 O 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-Ag 2 O nanocomposite as a nanoelectrode material for high-performance supercapacitors.