Microwave reduced graphene oxide sheets for high performance supercapacitor applications

Among the new generation of carbon materials, graphene stands out due to its extraordinary physicochemical properties, making it highly suitable for the fabrication of high-energy storage devices. In this report, we present the utilization of microwave-reduced graphene oxide (MrGO) as the material for supercapacitor electrodes. This method proves to be cost-effective and readily reproducible. To analyze the synthesized electrode material comprehensively, we conducted structural and spectroscopic examinations employing various techniques, including X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy and FTIR spectroscopy. The resulting supercapacitor device exhibits an impressive specific capacitance of 382 F g-1 at a scan rate of 5 mV s-1. After subjecting the device to 10,000 cycles, the Coulombic efficiency remained remarkably high. Importantly, our proposed method demonstrates excellent scalability, capable of producing advanced and efficient supercapacitors in large quantities. Furthermore, we determined that the maximum energy density and power density of this setup are 45 Wh kg-1 and 700 W kg-1, respectively. These findings underscore the tremendous potential of MrGO in the development of high-performance supercapacitors, showcasing its prowess in energy storage applications.