Preparation of Graphene\nOxide/Polyaniline Nanocomposite\nwith Assistance of Supercritical Carbon Dioxide for Supercapacitor\nElectrodes

Abstract

We report a facile strategy to prepare graphene oxide\n(GO)/polyaniline\n(PANI) nanocomposite by in situ polymerization with the assistance\nof supercritical carbon dioxide (SC CO₂). The morphology\nand chemical structure of the synthesized samples were characterized\nby scanning electron microscopy (SEM), transmission electron microscopy\n(TEM), X-ray diffraction (XRD), FT-IR, Raman, and UV–vis spectrophotometry.\nAs a result, PANI nanoparticles uniformly cover the GO sheets with\nthe help of SC CO₂, and the formation mechanism is suggested.\nThe morphologies of GO/PANI nanocomposites can be controlled through\nadjusting the concentration of aniline. The GO/PANI nanocomposite\nexhibits better specific capacitance and cycle stability than pure\nPANI and GO owing to the synergistic effect of GO and PANI nanoparticles,\nmaking it promising application in electrochemical devices.