Chelated Zn–Metal–Organic Frameworks: Synthesis, Crystal Structure and Electrochemical Energy Storage

Abstract

We have successfully synthesized the chelated Zn-EDTA metal–organic framework (Zn–MOF) by an eco-friendly hydrothermal route at 160 °C. The product obtained was confirmed by techniques such as ATRIR, SEM, SXRD, TGA, and BET. High stability, homogeneous topology, and significant surface area are the notable properties, which have been studied. The electrochemical redox behavior property of the as-prepared Zn–MOF electrode was investigated in 0.005 M K4Fe(CN)6 solution by Cyclic voltammetry. The CV nature obtained by the Zn–MOF electrode implies the typical battery act from the surface redox reaction. The chelated Zn–MOF electrode has been subjected to charge–discharge study to find out the specific capacity of the Zn–MOF electrode in KOH solution different temperatures and also in mixed electrolyte separately. Higher specific capacity of the Zn–MOF electrode about 243.2 mA hg-1 was found at room temperature in 0.1 M KOH at 1 Ag-1. Also, excellent capacity about 589.28 mA hg-1 was observed in mixed electrolytes. The Zn–MOF to be a promising candidate for energy (gas) storage application