Study of Reduced Graphene Oxide Dispersions via Electrical Impedance Spectroscopy

Abstract The aim of the present work is to study aqueous reduced graphene oxide (rGO) dispersions through the application of Electrical Impedance Spectroscopy. The first step of the production of rGO/cement composites is the production of such dispersions. Six rGO dispersions were produced corresponding to different concentrations of the binder. Ultrasonic energy was applied in all dispersions and their electrical properties are measured through the application of Electrical Impedance Spectroscopy during ultrasonication. The experimental results showed that the appropriate rGO concentration was at 0.15 wt% of the binder, as the dispersion was dense enough for the production of conductive networks, and at sonication energy of 60 kJ, as significant decrease of electrical impedance was noticed.