Effect of nanostructured graphene oxide on electrochemical activity of its composite with polyaniline titanium dioxide

Abstract

Graphene oxide (GO) significantly affects the electrochemical activity of its composite with polyanline titanium dioxide (TiO2). In this work various composites with different GO contents have been successfully synthesized by chemical method to compare not only their material properties but also electrochemical characteristics with each other. The results of an electrochemical impedance study showed that their electrochemical property has been improved due to the presence of GO in a composite matrix. The galvanodynamic polarization explained that among them the composite with GO/Ani ratio in the range of 1–14 exhibits a better performance compared to the other due to yielding a higher current desity (280 μA cm−2). The TEM and SEM images which presented the fibres of a composite bundle with the presence of PANi and TiO2 were examined by IR-spectra and x-ray diffraction, respectively.

Fabrication of Graphene Oxide Supercapacitor Devices

“…The GO was observed to contain 66.8% carbon and 28.6% oxygen with trace amounts of nitrogen, sulfur, and chlorine which are likely merely contaminants. Specifically, groups corresponding to graphitic CC bonding in addition to CO or COC bonds (47.21%, 286.7 eV) and CO or COO bonds (7.94%, 288.4 eV) where characteristically present, which is in excellent agreement with previous literature reports regarding GO. ,, …”

“…Specifically, groups corresponding to graphitic CC bonding in addition to CO or COC bonds (47.21%, 286.7 eV) and CO or COO bonds (7.94%, 288.4 eV) where characteristically present, which is in excellent agreement with previous literature reports regarding GO. 1,11,13 Table S1 shows the elemental composition of a bare/ unmodified screen-printed electrode (SPE) and the GO-SPEs; it is clear from inspection of this table that there is an increase in the oxygen present on each platform's surface associated with an increase in the GO present within the supercapacitor device. Finally, Raman spectroscopy was utilized to confirm the presence of GO by structural characterization; the obtained spectra can be viewed in Figure 1C and display the D and G vibrational band peaks at ca.…”

“…One alternative is by means of chemical oxidation. The resulting graphene oxide (GO) is typically reduced to graphene and used as the basis of the energy storage devices …”

“…The resulting graphene oxide (GO) is typically reduced to graphene and used as the basis of the energy storage devices. 11 Two essential criteria, for any commercially applicable energy storage device, are its longevity and stability in spite of extensive usage and fast charging rate during recharging. Producing an energy storage device, which exhibits these traits is not easily achievable in common battery arrangements.…”

Supercapacitor performances of titanium–polymeric nanocomposites: a review study

“…These conducting polymers are polyaniline (PANI) [161][162][163], polypyrrole (PPy) [164,165], polythiophene (PTh) [166], poly(3,4-ethylenedioxythiophene) (PEDOT) [167,168], etc. In literature, PANI-TiO 2 -GO composites have been presented by Phan et al [169]. In this work, the chemical method was performed in a paste form on titanium substrate.…”