Layered Polyaniline–Manganese Oxide Nanocomposite Electrode Material for Supercapacitor Application

Abstract In the present research work, layered nanocomposite of polyaniline–manganese oxide (PANI/MnO 2 ) electrodes is synthesized using the potentiostatic electrodeposition method. The structural and morphological properties of the nanocomposite electrode materials are tested using X‐ray diffraction (XRD) and field emission‐scanning electron microscopy (FE‐SEM) techniques. The XRD analysis shows the amorphous nature of the electrode material. The FE‐SEM micrographs show porous morphology. The supercapacitive properties are investigated using cyclic voltammetry, galvanostatic charge‐discharge, cyclic stability, and electrochemical impedance spectroscopy techniques in 1 M Na 2 SO 4 electrolyte. The layered nanocomposites show maximum values of specific capacitance which is 582 F g −1 at a scan rate of 5 mV s −1 . The synergistic effect of layered nanocomposite leads to enhancement in the supercapacitive performance than the pristine electrode.