Synthesis and Characterisations of TiO₂ Coated Multiwalled Carbon Nanotubes/Graphene/Polyaniline Nanocomposite for Supercapacitor Applications

Debasis Ghosh, Soumen Giri, Swinderjeetsingh Kalra, Chapal Kumar Das

Department of Chemistry, Dayanand Anglo-Vedic (D.A.-V.) College, Kanpur, India.
Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur, India.

DOI: 10.4236/ojapps.2012.22009                

Abstract

Nowadays with ever increasing demand of energy, developing of alternative power sources is an important issue all over the world. In this respect we have prepared nanocomposites based on metal oxide (titanium oxide) coated multiwalled carbon nanotubes (MWCNTs)/polyaniline (PANI) with graphene and without graphene and studied their electrochemical performance. The formation of the polymer in the nanocomposites was confirmed by the Fourier Transform Infrared Spectroscopy (FTIR) study. The morphological characterisations were carried out by the Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM). To characterize the prepared nanocomposites electrode, a cyclic voltammetry test for measuring specific capacitance, and an impedance test were conducted. The highest value of specific capacitance obtained for the TiO₂ coated MWCNTs/PANI nanocomposite was 443.57 F/g at 2 mV/s scan rate. Upon addition of graphene nanosheet to the TiO₂ coated MWCNTs in a weight ratio of (9:1) the specific capacitance value increased to 666.3 F/g at the same scan rate, also resulting in an increase in energy density and power density.

Keywords

Supercapacitors; Polyaniline; Nanocomposites; Graphene Nanosheet

Conflicts of Interest

The authors declare no conflicts of interest.

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