Design and development of diamond-shaped Silver-Trimesic acid based Metal-Organic framework for high-performance supercapacitor application

Abstract

A metal–organic framework serves as one of the promising electrode materials for supercapacitor applications due to its tunable porous structures. The concentration of silver salt and trimesic acid plays a vital role in the formation of the Ag-TA metal–organic framework. Herein, we successfully synthesized the orthorhombic crystal structured Ag-TA with high surface area which enhances the ions intercalation and deintercalation during charging/discharging process. The prepared material exhibits diamond shaped morphology with a large surface area of 106.569 m2 g−1. The Ag-TA electrode exhibits a maximum specific capacity of 917 C g−1 at a current density of 1 A g−1 and also has excellent cycling stability of 90 % capacity retention with an efficiency of 99.8 % after 5000 cycles. In addition to that the asymmetric (Ag-TA//AC) supercapacitor device is constructed which delivers a maximum energy density of 77.46 W h kg−1 at a power density of 0.65 kW kg−1 and also exhibits a remarkable specific capacity of 408 C g−1 at 1 A/g with excellent capacity retention of 97 % of its initial capacity and 98.4 % of Coulombic efficiency. The results of this work suggest that the possibility of using pristine Ag-TA MOF serves as a suitable electrode material for supercapacitor application.