Investigation of possible effects of electrolyte molarity on Ni-based MOF as an electrode material for highly efficient supercapacitors

Supercapacitors are promising electronic devices for future generations due to their outstanding capacitance, comparatively high energy, and power density than commercial batteries. Nowadays, researchers are paying attention on metal-organic frameworks (MOF) because of their tremendous versatility and used in supercapacitor applications. The present work investigates the synthesis and applicability of nickel-(BDC) framework (Ni-based MOF) utilizing electrode material for supercapacitor application. The fabricated Ni-based MOF electrodes were studied under different KOH molarity solutions via; 2 M, 4 M, and 6 M in a three-electrode system. Nikel-based MOF shows efficient results in a 6 M KOH solution with a specific capacitance of 778.7 F g^-1 at 16 A g^-1. Additionally, electrochemical impedance spectroscopy shows the minimum charge resistance in 6 M KOH solution compared with its counterparts. The Ni-based MOF electrode maintains its cyclic stability for 1000 cycles at 2 A g^-1. The reported outcomes may help in the development of novel MOF-based materials used in applications like supercapacitor and other electrochemical devices.