A Chemically Robust Zn-MOF with a Dual Role as a Symmetric Supercapacitor and Sustainable Hydrogen Storage Material

To achieve single-component multienergy storage materials with a chemically robust MOF, we introduce a 3D paddlewheel MOF, {[Zn₂(4-pmi)(hfipbb)₂].(H₂O)₃}_n, synthesized and characterized through elemental analysis, SEM, XPS, IR spectroscopy, PXRD, TGA, and SCXRD. This MOF is conspicuous with thermal stability up to 350 °C and structural integrity across harsh conditions including acidic, alkaline, open-air, high pressure, and organic solvent environments, ensuring unmatched durability. This robust framework enables hydrogen uptake of 1.15 wt % (128 cc/g) at 77 K and 1 bar. Beyond its gas sorption capabilities, this MOF delivers specific capacitance of 426 F/g at 1 A/g (three-electrode system) and 96 F/g in a symmetric two-electrode device, alongside an impressive energy density of 53 Wh/kg and a power density of 1000 W/kg. Even after 6000 cycles, it retains 71% of its initial capacitance, demonstrating superior cycling stability. This MOF-powered symmetric supercapacitor successfully lights up nine 1.5 V red LEDs for 1.5 min after just 1 min of charging. This material with thermal and pressure resilience, chemical robustness, hydrogen storage efficiency, and energy storage excellence redefines multifunctionality in porous materials, setting a new benchmark for future energy solutions.