Reduced graphene oxide supersonically sprayed on wearable fabric and decorated with iron oxide for supercapacitor applications

We demonstrate the fabrication of wearable supercapacitor electrodes. The electrodes were applied to wearable fabric by supersonically spraying the fabric with reduced graphene oxide (rGO) followed by decoration with iron oxide (Fe₂O₃) nanoparticles via a hydrothermal process. The integration of iron oxide with rGO flakes on wearable fabric demonstrates immense potential for applications in high-energy-storage devices. The synergetic impact of the intermingled rGO flakes and Fe₂O₃ nanoparticles enhances the charge transport within the composite electrode, ultimately improving the overall electrochemical performance. Taking advantage of the porous nature of the fabric, electrolyte diffusion into the active rGO and Fe₂O₃ materials was significantly enhanced and subsequently increased the electrochemical interfacial activities. The effect of the Fe₂O₃ concentration on the overall electrochemical performance was investigated. The optimal composition yields a specific capacitance of 360 F g⁻¹ at a current density of 1 A g⁻¹ with a capacitance retention rate of 89 % after 8500 galvanostatic cycles, confirming the long-term stability of the Fe₂O₃/rGO fabric electrode.