Optimizing supercapacitive performance of MXene through MOF-derived nickel ferrite nanoparticle integration

To optimize the supercapacitive performance of MXene, a simple physical mixing method is used for the decoration of Metal Organic Framework (MOF)-derived rhombohedral-shaped nickel ferrite nanoparticles (NFO NPs) into the Ti3C2Tx MXene layers. NFO NPs acted as spacers between the MXene layers resulting in a larger surface area of the nanocomposite. The loading percentage of NFO NPs was found to significantly affect the structural characteristics and thereby the supercapacitive performance of the nanocomposite. The MXene composite with 8 % NFO NPs loading (MXene/NFO-8) exhibited a specific capacitance of 660 F g−1 at a 1 A g−1. An all-solid-state asymmetric supercapacitor (ASC) device was fabricated using the MXene/NFO-8 composite film (positive electrode) and activated carbon (negative electrode). The fabricated ASC displayed a working potential of 1.42 V, excellent cyclic durability, and an energy density of 17.36 W kg−1 at a power density of 718.48 Wh kg−1.