Synthesis of Ni-Based Metal-Organic Frameworks Using Five Distinct Precursors and Their Energy Storage Performance as Electrodes in Supercapacitor /

Abstract

For supercapacitor applications Metal organic framework as an electrode material have emerged as an attractive alternative for large scale energy storage due to their enormous specific surface area and porous structure. The crucial aspect is the selection of electrode material. Nickle has drawn a lot of attention because of its advantageous qualities, which include strong electrical conductivity, chemical stability, tunable oxidation states, and an overall contribution to the material's porosity and surface area. Herein, five distinct Ni MOFs were synthesized through solvothermal methods using five distinct ligands to investigate their properties as supercapacitor electrode materials. The Brunauer-Emmett Teller method is used to compute the specific surface area and Ni-PM MOF shows the highest surface area value among all prepared electrodes, calculated as 24.38 m2 g -1 . Ni-PM MOF has the highest specific capacitance of 1497 F g-1 at 0.5 A g-1 and charge transfer resistance Rct value of 0.82 Ω in comparison to all other prepared electrodes. Furthermore, demonstrating outstanding cycling stability of 94.1 % capacitance retention (5000 cycles). Results indicate that Ni-PM MOF, out of all the prepared Ni-MOFs, can provide the best performance demonstrated by all characterizations including XRD, SEM, TEM, XPS, BET, Raman and Electrochemical measurements as well. Overall, Ni-PM MOF can be used as a potential electrode material for a supercapacitor application due to better electrochemical performance compared to other Ni-MOFs.