Synthesis, Structural, Morphological, Electrical, and Electrochemical Properties of Ni(OH) 2 /Reduced Graphene Oxide Composite Materials

Abstract

The paper presents the experimental results of the composite-materials’ synthesis on the base of nickel hydroxide -Ni(OH) 2 and reduced graphene oxide using ultrasound dispersion of hydrothermally obtained -Ni(OH) 2 and previously chemically reduced graphene oxide. The synthesized mate- rial is investigated by XRD, SEM, and impedance spectroscopy. The in- creasing of composite dispersion degree at increasing of carbon-component content is observed. The electrical conductivity of pure -Ni(OH) 2 and rGO, and -Ni(OH) 2 /rGO composite materials at different ratios of compo- nents is analysed at different frequencies in the temperature range of 25– 200C. The decrease in the activation energy of an electric conductivity for the -Ni(OH) 2 /rGO nanocomposite at the component ratio of 1:2, in comparison with pure rGO, is observed.