Electrochemical Impedance Spectroscopy as a Novel Approach to Investigate the Influence of Metal Complexes on Electrical Properties of Poly(vinyl alcohol) (PVA) Composites

In the current study, black tea leaves extract solution (TES) as a new green technique is used to fabricate metal-polyphenols complexes (X-polyphenols complex; X= Cu+2, Ce+3, and Cd+2). The metal-complexes are integrated with poly (vinyl alcohol) (PVA) prepare PVA composite films. electrical properties of pure composites characterized using electrochemical impedance spectroscopy (EIS) method. EIS data fitted electrical equivalent circuit evaluate impedance parameters trend DC conductivity further verified by dielectric analysis. considerably improved upon incorporating metal-complexes. effects metal-complexes on modification PVA compared together. incorporated Cu+2-complex shows highest constant, which important for application in energy storage devices such batteries supercapacitors, comparison Ce+3- Cd+2- complexes.