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

In this study, a simple and cost effective one-pot hydrothermal process has been carried out for the synthesis of 1D CoMoO4 center dot 0.75H(2)O nanorods. A binary composite of CoMoO4 center dot 0.75H(2)O/PANI has also been synthesized by the in situ oxidative polymerization of aniline with virgin CoMoO4 center dot 0.75H(2)O. Two types of PANI morphologies have been demonstrated: amorphous nanodimensional PANI uniformly coated on CoMoO4 center dot 0.75H(2)O nanorods, and interconnected hollow spheres like PANI inside the bulk material. The prepared CoMoO4 center dot 0.75H(2)O/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 center dot 0.75H(2)O/PANI composite. The electrochemical characterization of the pseudocapacitive CoMoO4 center dot 0.75H(2)O and CoMoO4 center dot 0.75H(2)O/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 center dot 0.75H(2)O-86.3% retention of specific capacitance.