Facile synthesis of Ce2(WO4)3-decorated polyaniline composites as promising electrode material for supercapacitor applications

In the present work, rare earth metal oxides composed of cerium tungstate/polyaniline (Ce-2(WO4)(3)/PANI) composites were prepared by an in situ chemical oxidative polymerization process and their supercapacitive behavior was evaluated. The structural and morphological properties of the Ce-2(WO4)(3)/PANI composites were characterized via spectral and analytical techniques. X-ray diffraction revealed that the two prominent peaks for Ce-2(WO4)(3) and PANI located at 2 theta = 28.3 degrees and 25.4 degrees were in good accordance with the observed 2 theta values in Ce-2(WO4)(3)/PANI composite. Field-emission scanning electron microscopy (FESEM) studies of Ce-2(WO4)(3)/PANI had a nano-spherical interconnected with a layer-like morphology, which results in a rapid electron exchange. Electrochemical analysis revealed that Ce-2(WO4)(3)/PANI exhibited an increased supercapacitor electrode response with a significant specific capacity (C-s) of 399 C g(-1) at 1 Ag-1 and exhibited a remarkable capacity retention of 90.5% even after 3000 galvanostatic charge-discharge (GCD) cycles with 84% columbic efficiency, suggesting its promising electrode material for SCs.