Fe2O3 decorated graphene oxide/polypyrrole matrix for high energy density flexible supercapacitor

•Flexible and environmentally benign ternary architecture of Fe-PrGO for high performance supercapacitor.•Excellent specific capacitance of 442 F g-1 at a current density of 1 A g-1 with outstanding stability over 8000 cycles.•Fe-PrGO demonstrates the synergetic effects of PPy, rGO, and Fe2O3.•Supercapacitor prototype exhibits an outperforming energy density of 61.39 Wh kg-1. The emerging miniaturized energy storage devices focus on wearable, flexible, and portable electronic devices with high energy density, fast energy transfer capability, long charge-discharge cycles, and low cost. In the present work, a one-step chronoamperometry technique was used to fabricate the three-dimensional ternary architecture of iron oxide embedded polypyrrole-rGO matrix (Fe-PrGO) and the corresponding binary (PrGO) and unary (PPy) to have a comparative study on the enhancement of the capacitance. A thorough investigation was carried out to interpret the crystal structure, composition, material morphology, and electrochemical performance. The structure-property-performance correlation was analysed for realising the suitability of the prepared hybrid nanocomposites as electrode materials. The prepared electrode showcased a specific capacitance of 442 F g−1 in an aqueous electrolyte (1 M KCl) at a current density of 1 A g−1. The Fe-PrGO electrode displayed a good cycle performance with 88% of the original capacity retained over 8000 cycles that may be attributed to the superior ion-transport kinetics offered by the synergistic effect of properly selected components. Our study confirms that Fe-PrGO offers an effective solution to enhance the preparation of metal oxide based low-cost environmentally benign flexible supercapacitors to power the virtual health-care devices that become a permanent outcome of the COVID-19 pandemic and flexible supercapacitor for long cycling applications Schematic for the preparation of Fe-PrGO composite electrode [Display omitted] .