Optimizing binder for enhanced oxygen evolution and supercapacitance in a PCN-224 functionalized V₂CT_x composite

The synthesis of nanoscale porous coordination network (PCN-224 MOF) is intricate due to the difficulty in spatially influencing typical soluble metal salt chemicals, leading to the formation of bulk MOFs. This study presents the novel utilization of V₂CT_x as a metal precursor for the preparation of PCN-224 MOF nanostructures, with the ability to modulate the resulting nanostructure by adjusting the reaction temperature. The growth of PCN-224 provides the surface atoms with strong electronegative in V₂CT_x MXene and the availability of abundant accessible active sites for ligands. This study introduces a novel methodology for fabricating a composite material by integrating V₂CT_x MXene and PCN-224 MOF. The PCN-224/V₂CT_x supercapattery have 185.5C/g specific capacity (Q_s) at 2 A/g and an electrode with 82 Wh/kg and 840 W/kg energy density (E_d) and power density (P_d). The electrode exhibited a coulombic efficiency and capacitive retention of 96 % and 82 % after undergoing 15,000 cycles. It has outstanding cyclic stability, maintaining 94 % of charge time and 97 % discharge time after 15,000 cycles. This study suggests using duplicate cell electrodes of PCN-224/V₂CT_x supercapattery in daily-use portable devices and oxygen evaluation reaction (OER) investigation. This is the first study to examine PCN-224/V₂CT_x electrochemical behavior and propose high-energy, high-rate electrochemical devices use it as an electrode.