Synthesis and supercapacitor performance of polyaniline-titanium dioxide-samarium oxide (PANI/TiO2-Sm2O3) nanocomposite

TiO 2 -Sm 2 O 3 binary oxide has been successfully synthesized using a two steps photolysis method with UV-irradiation (15 W and 256 nm) as a power source of irradiation system, and it modified PANI during simple oxidative polymerization route to get polyaniline/Sm 2 O 3 -TiO 2 nanocomposite. The structural, morphology and electrochemical properties of as-synthesized polyaniline /Sm 2 O 3 -TiO 2 nanocomposite have been estimated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Field Emission scanning electron microscope (FE-SEM), Chronopotentiometry (CP), Cyclic voltammetry (CV) and Electrochemical Impedance spectroscopy (EIS). The measurements from XRD exhibit synthesis anatase TiO 2 phase with tetragonal structure and (monoclinic and cubic) mixture structure of Sm 2 O 3 . The FE-SEM images display prepare spherical nanoparticles that covered fiber morphology of polyaniline. Interestingly the synthesized polyaniline/Sm 2 O 3 -TiO 2 nanocomposite demonstrates supercapacitance properties with value 881F/g and 141wh/kg, which observed to be larger than pure polyaniline and polyaniline/Sm 2 O 3 . In addition to, the galvanostatic charge–discharge (GCD) properties obtained the nature of pseudocapacitive for PANI/Sm 2 O 3 -TiO 2 nanocomposite. The EIS results exhibit the superior electrochemical behavior for PANI/TiO 2 -Sm 2 O 3 compared with PANI and TiO 2 -Sm 2 O 3 .