CoFe۲O۴@Chitosan core-shell nanostructure for high performancesupercapacitor

Supercapacitors display a new category of energy storage devices that have been attracted manyresearchers in last few years. AB۲X۴ spinels are known to be among the crystalline metal oxidecompounds which have been considered in high frequency devices due to their satisfactoryperformance [۱]. A, B and X are considered as a divalent cation, trivalent cation and the divalentanion, respectively in the stoichiometric formula of this type of spinel [۲, ۳]. Here, we have showed the designed and fabrication a supercapacitor based on metal-spinel core-shell nanocomposite (CoFe۲O۴@Chitosan) as an electrode in aqueous KOH electrolyte solution. The CoFe۲O۴@Chitosan nanocomposite was synthesized by the chemical deposition method. Thecharacterization of synthesized nanocomposite have been study by scanning electron microscopy(SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR ). The purpose of the presentresearch is to describe the performance of the new CoFe۲O۴ nanocomposite, which improvesaggregation and surface area due to the formation of core-shell with chitosan. TheCoFe۲O۴@Chitosan nanocomposite show better electrochemical performance than the pure individual components. Figure ۱ exhibits a comparision between the CV curves of the CoFe۲O۴and CoFe۲O۴@Chitosan at ۱۰ mV/s. A good specific capacitance of ۴۶۷.۵۴ F/g is obtained at a scan rate of ۱۰ mV/s in KOH (۳M) solution compared to CoFe۲O۴. The resulting composites are promising electrode materials for high-performance electrical energy storage devices.