Performance evaluation of polyacrylamide/silver composite as electrode material in electrochemical capacitor

In this research, polyacrylamide/Ag composite is synthesized and used as an electrode in an electrochemical capacitor (EC). The characterization of the composite is performed by X-ray diffraction, scanning electron microscopy, and cyclic voltammetry methods. The electrochemical characterization is conducted in an electrolytic solution of KOH and an electrolytic solution of Na₂SO₄. The capacitance of the polyacrylamide/Ag composite is associated mainly with the reduction/oxidation of Ag. The specific capacitance of the EC using the KOH electrolyte is 950 Fg^?1, which is better than the capacitance in the Na₂SO₄ electrolyte. This behavior is explained by the respective physical characteristics of the two electrolytes.