Superior electrochemical capacitive performance of supercapacitors based on pristine Cu₃(HAB)₂ MOFs electrodes

2D Metal-organic frameworks (MOFs) have recently received increased attention as functional materials for various applications because of their tunable structures and high surface areas. MOFs have been explored as electrodes in electrochemical energy storage devices, but because of their poor conductivity, they have been mixed with conductive additives or binders for these applications. Herein, we use pristine copper hexaaminobenzene Cu₃(HAB)₂ for the fabrication of supercapacitors’ electrodes. The morphology of the Cu₃(HAB)₂ electrodes was characterized by scanning electron microscopy (SEM), and transmission electron microscopy (TEM) and shows a porous three-dimensional structure with a sheet like morphology. The MOF-based symmetric supercapacitor, demonstrated a superior electrochemical capacitive performance over a potential window of 0-1.4V, and displayed an areal capacitance of 16.33 mF cm^-2. Additionally, the MOF-based supercapacitor exhibited a remarkable ultra-high cycling stability with a retention of 80% after 100,000 cycles. These promising results demonstrate the potential of using pristine MOFs as the next generation of materials for supercapacitors applications.