A facile one-step hydrothermal method to produce graphene oxide/Fe _2O _3-nanotubes composites and its electrochemical properties (Review)

摘要

The composites of graphene oxide/Fe _2O _3-nanotubes (GO/Fe _2O _3-NTs) have been fabricated through a facile one-step hydrothermal method. Fe _2O _3-NTs crystallines were homogeneously distributed on GO, which have been confirmed by transmission electron microscopy analysis (TEM). The structure, composition and electrochemical properties of GO/Fe _2O _3-NTs composites were investigated by means of selective-area electron diffraction (SAED), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Raman spectra, cyclic voltammogram (CV) curves and galvanostatic chargedischarge curves. GO/Fe _2O _3-NTs composites exhibit a high specific capacitance of 133.2 Fg ~(-1) in 1 M Li _2SO _4 electrolyte. In addition, the GO/Fe _2O _3-NTs composites electrode shows good long-term cycle stability (only 9% decrease of the specific capacitance is observed after 1000 chargedischarge cycles).