Polyaniline-wrapped 1D CoMoO4·0.75H2O nanorods as electrode materials for supercapacitor energy storage applications?

RSC Advances Pub Date: 2014-06-19 DOI: 10.1039/C4RA03399J

Abstract

In this study, a simple and cost effective one-pot hydrothermal process has been carried out for the synthesis of 1D CoMoO4·0.75H2O nanorods. A binary composite of CoMoO4·0.75H2O/PANI has also been synthesized by the in situ oxidative polymerization of aniline with virgin CoMoO4·0.75H2O. Two types of PANI morphologies have been demonstrated: amorphous nanodimensional PANI uniformly coated on CoMoO4·0.75H2O nanorods, and interconnected hollow spheres like PANI inside the bulk material. The prepared CoMoO4·0.75H2O/PANI composite was characterized by X-ray diffraction analysis and Fourier transform infrared spectroscopy for the phase and formation, respectively. The surface morphology was investigated by using FESEM and TEM, which revealed the formation of the CoMoO4·0.75H2O/PANI composite. The electrochemical characterization of the pseudocapacitive CoMoO4·0.75H2O and CoMoO4·0.75H2O/PANI composites in 1 M Na2SO4 showed the highest specific capacitances of 285 F g?1 and 380 F g?1, respectively, at a current density of 1 A g?1. The cyclic stability test demonstrated the specific capacitance retention of about 90.4% after 1000 consecutive charge–discharge cycles at a constant current density of 1 A g?1, which is also higher than that of virgin CoMoO4·0.75H2O—86.3% retention of specific capacitance.

Graphical abstract: Polyaniline-wrapped 1D CoMoO4·0.75H2O nanorods as electrode materials for supercapacitor energy storage applications
Recommended Literature