Laser-Induced Crafting of Modulated Structural Defects in MOF-Based Supercapacitor for Energy Storage Application

Metal–organic frameworks (MOFs) have emerged as promising contenders in storage applications due to their unique properties. In this study, we synthesized CuZn-MOF-P_x by meticulously adjusting the laser power during fabrication. This precise tuning substantially enhanced controlled defects and porosity, enhancing the electrode’s surface area and specific capacitance. The optimized CuZn-MOF-P₇ electrode demonstrated a specific capacitance of 3.7 F cm^–2 at 1 mA cm^–2 current density. Furthermore, the electrode showed outstanding durability, holding onto 97% of its capacitance at 50 mA cm^–2 after 16000 cycles. To demonstrate its practical utility, we engineered a planar hybrid supercapacitor (PHSC) employing CuZn-MOF-P₇ as the cathode and activated carbon (AC) as the anode. This configuration displayed 22.3 μWh cm^–2 and 6.75 mW cm^–2 of energy and power density, respectively, highlighting its efficiency and applicability. This work’s significance lies in the innovative use of laser irradiated approach for improving the performance of MOF-based materials for energy storage devices.