Isonicotinic acid-based copper-MOF: An exotic redox propertied electrode material for high energy asymmetric supercapacitor

Metal-organic frameworks (MOFs) have been explored as potential electrode materials with significant electrochemical outcomes, but still crave for higher energy density, and electrical conductivity. Among diverse choices of metal nodes and linkers, optimization as well as a thorough understanding of charge storage mechanisms is still to accomplish. This research article investigates the electrochemical performance and charge storage chemistry of isonicotinic acid-based copper Copper-Metal Organic Framework (Cu-MOF) synthesized via hydrothermal approach. SEM, XRD, and FTIR were employed to depict the structural and surface analysis. Investigation in three cell configurations revealed prominent redox active behavior of Cu-MOF with a sound maximum specific capacity of 469.12C/g (781.87 F/g) at 0.6 A/g. Further, the depiction of storage insight via simulation approach reveals dominant faradic characters (6.30 % non-Faradic contributions at 3 mV/s) and sound conductivity of electrode material. The employment of Cu-MOF as positive electrode material in a hybrid supercapacitor configuration delivered a splendid specific energy of 48.50 Wh/kg at 1.3 A/g. A remarkable specific power of 8667 W/kg was achieved via the fabricated device while sustaining specific energy of 33.32 Wh/kg (68.70 % preservation) at a high current density of 10 A/g. After 5000 GCD cycles, the prototype stood out with an excellent 93.47 % retention and improved conductivity. Scrutinization of device charge storage insights discloses substantial hybrid behavior with 89.69 % diffusive contents at 3 mV/s and 53.11 % capacitive benefaction at 100 mV/s. To the best of our knowledge, this is the first approach toward scrutinizing the electrochemical behavior of Isonicotinic acid based Cu-MOF and finding present it as a potential electrode material for high energy and rate capability electrochemical systems.