Abstract
Recent years have seen an increase in the need for high-power, high-density electronic devices that are flexible and portable. Researchers are currently interested in flexible energy storage devices like supercapacitors and batteries. High porosity and potential for storing high charges make metal-organic frameworks (MOFs) attractive for various electrochemical applications. Nanocomposite materials based on MIL-100(Fe) were synthesized using Polyaniline and Graphene (Gr) nanosheets. Multiple approaches were used to characterize the manufactured composites. PANI/Gr/MIL-100(Fe) has been reported as a supercapacitor electrode with capacitive energy storage properties for the first time. PANI/Gr/MIL-100(Fe) in acidic electrolyte displayed the maximum specific capacitance of 638 F/g at 1 A/g and the lowest charge transfer resistance among the produced compounds. Furthermore, a PANI/Gr/MIL-100/Active carbon (AC) asymmetric supercapacitor demonstrates superior electrochemical performance, producing a high energy density (53 Wh/kg) and a high-power density (1225 W/kg). The outstanding electrochemical performance of ternary composites results from a facilitated electron transport structure, a large surface area, and synergistic effects between all three components. This exceptional performance indicates a promising future for flexible supercapacitors of the next generation.
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