Improved electrochemical performance of tri metallic-organic framework decorated with graphene oxide sheets for high-performance energy storage applications

Abstract

The recent progress in development of metal-organic frameworks (MOFs) have gathered significant interest for their application in the invention of supercapacitors owing to their large surface area and substantial absorbency. Though, inadequate ability to conduct electricity as well as suboptimal mechanical features of the MOFs constrained its applicability within the field. Therefore, tri-metallic MOF with graphene oxide (Ni-Mg-Mo-MOF@GO nanocomposite) was synthesized to improve the weak characteristics of MOF. The CV measurement revealed a specific capacitance of 14125 F/g in a system consisting of three electrodes with an electrolyte of 1 M KOH at a scan rate of 10 mV/s when the Ni-Mg-Mo-MOF@GO nanocomposite was utilised as the conducting electrode component for a supercapacitor. Ni-Mg-Mo-MOF@GO/carbon active/accumulated in 1 M KOH electrolyte solution inside a potential window range of 0.75V demonstrate excellent energy storage ability due to the synergistic interaction between graphene oxide. In GCD analysis Ni-Mg-Mo-MOF@GO had the largest specific capacitance with a power density of 561Wkg^–1 and a current density of 1.33Ag^–1. This study confirms that Ni-Mg-Mo-MOF@GO increases both capacitive and diffusive controlled current contribution process respectively. Electrochemical outcomes demonstrate that this nanocomposite's enhance super-capacitive performance. Consequently, for high energy storage applications, this nanocomposite may be an ideal electrode material.