Optical, electrochemical and corrosion resistance properties of iron oxide/reduced graphene oxide/polyvinylpyrrolidone nanocomposite as supercapacitor electrode material

Iron oxide (Fe3O4)/reduced graphene oxide (rGO)/polyvinylpyrrolidone (PVP) nanocomposite films with varying iron weight percentages were prepared by electrospinning spray method on glass, aluminium foil and Si (100) substrate. The size of Fe3O4/rGO/PVP composite particles varied between 0.75 and 1.35 mu m on the surface of the graphene sheet. The diffraction peaks at 36.77 degrees, 47.06 degrees, 52.98 degrees and 61.34 degrees confirmed the plane (311), (400), (422) and (440) of the Fe3O4 crystal lattice, respectively. The broad peaks around 26.6 degrees and 43.47 degrees correspond to the planes (002) and (102) for the rGO sheet in the Fe3O4/rGO/PVP nanocomposite films. The defect parameter, I-D/I-G ratio varied from 0.17 to 0.34 with 15 and 25wt% Fe3O4 content, respectively, indicates the decreasing of defects in the Fe3O4/rGO/PVP network. The minimum value of E-corr and I-corr are 0.18 V and 4.76 mu A, respectively.