Effect of Hematite on the Energy Storage Performance of Polyaniline/Zeolite HY/α-Fe2O3 Nanocomposite Supercapacitor Electrode

The main goal of the present work is the elaboration of new nanocomposite conducting poly(aniline) with alpha-Fe2O3 nanoparticles in the presence of zeolite HY acid in aqueous electrolyte by chemical oxidative polymerization. Various formulations of the polymer were synthesized (5, 10, and 20% of alpha-Fe2O3) and the nanocomposites poly(aniline)/HY/alpha-Fe2O3 have been characterized by X-ray diffraction (XRD), SEM analysis, and FT-IR spectroscopy. The electrical conductivity and the UV-visible spectroscopy of the nanocomposites were also investigated. In addition, the electrochemical properties were studied by cyclic voltammetry. (CV) and electrochemical impedance spectroscopy. The optimal ratio between alpha-Fe2O3 and poly(aniline)/HY was found to be 5 wt%. The specific capacitances of poly(aniline)/HY and nanocomposite were found to be be 630, and 1000 F g(-1) respectively at a scan rate of 5 mV/s. Besides, the material possesses a high energy density of 88.88 Wh kg(-1) and a maximum power density of 1632.3 W kg(-1). These electrochemical results indicate that the PANI/HY/alpha-Fe2O3 nanocomposites is an attractive candidate for the application in the high-performance energy storage systems.