Synergy-Driven CeO2/rGO/MXene Hybrid Nanoarchitectures with Tunable Conductive Pathways for Sustainable Energy Storage

Abstract The increased requirement for smart electronic devices and renewable energy systems has attracted a lot of attention to the development of high-performance energy storage devices. This study synthesized and studied a CeO2/rGO/MXene nanocomposite as an electrode material for supercapacitor applications. CeO2, rGO, and MXene are employed in association to improve electrical conductivity, surface area, and electrochemical activity. As a result, electrochemical performance in a three-electrode setup shows a high specific capacitance of 1167.8 F/g at 1 A/g, with 90% retention after 6000 cycles of long-term durability for electrochemical stability. A symmetric supercapacitor, CeO2/rGO/MXene, owes its performance to enhanced surface and redox-based charge storage at the interface. Its electrode delivered a specific capacitance of 19.4 F/g at a current density of 1 A/g. The energy density is 21.6 Wh/kg, and the power density is 1080 W/kg, with 94% retention after 5000 cycles. The enhanced conductivity and redox activity of the CeO2/rGO/Mxene hybrid structure contribute to improved energy storage performance, highlighting its suitability for upcoming electrochemical energy storage devices.