La₂MnFeO₆-double perovskite decorated 2D Ti₃C₂-Mxene hybrid nanocomposite for superior energy density supercapacitor for efficient LED powering

The advancement in electrode materials is crucial for the development of high-performance energy storage devices. In this study, we report the synthesis and characterization of a novel nanocomposite consisting of La₂MnFeO₆ (LMFO) perovskite oxide and 2D Ti₃C₂ MXene for supercapacitor applications. The LMFO/Ti₃C₂ nanocomposite leverages the high redox activity of LMFO and the exceptional electrical conductivity and layered structure of Ti₃C₂, yielding a synergistic effect that enhances electrochemical performance. Comprehensive characterization using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) confirms the successful integration of LMFO and Ti₃C₂. Electrochemical evaluations in a two-electrode system demonstrate a specific capacitance of 78.0 F g⁻¹ at 0.2 A g⁻¹, an energy density of 67.70 Wh. kg⁻¹, and a power density of 250 W kg⁻¹ over a wide potential window (0–2.5 V). Electrochemical Impedance Spectroscopy (EIS) verifies the low charge transfer resistance of the device. Notably, the incorporation of Ti₃C₂ enhances the conductivity of the electrode material. This work highlights the potential of LMFO/Ti₃C₂ nanocomposites as efficient and durable electrode materials, offering a promising avenue for sustainable energy storage systems.