MXene-boosted cerium‑lanthanum oxide-based nanocomposite for all solid state supercapacitor applications

This study discuss about CeO₂-La₂O₃-MXene-based nanocomposite that was synthesized using a microwave-assisted method for supercapacitor applications. Crystallographic and morphological analyses confirmed the successful distribution of MXene in the oxide matrix, where thin nanosheets of oxides were observed to be grown on the layered MXene structure. Surface analysis revealed an increase in surface area and porosity due to the altered morphology. Electrochemical measurements shown a significantly enhanced specific capacitance of 1254 F g⁻¹ at a current density of 2 A g⁻¹, outperforming both the bare and combined oxide materials. Furthermore, an asymmetric solid-state device that fabricated by using the prepared electrode and activated carbon as electrode materials achieved an energy density of 31.33 Wh kg⁻¹ and a power density of 3000 W kg⁻¹, along with 77 % capacitance retention after 25,000 cycles. The device successfully powered an LED, illustrating its practical applicability. These results highlight that the incorporation of conductive MXene in CeO₂–La₂O₃ enhanced the electrochemical performance.