Green Chemistry Approach for One‐Step Synthesis of Iodinated Graphene Material for Supercapacitor Applications

Abstract

Iodinated graphene is a promising 2D material with unique physical and chemical characteristics. A new synthesis method that combines iodine intercalation and surface reduction of graphite sheets in a single step was developed. This method uses NaIO4 and m‐CPBA to efficiently incorporate iodine and selectively remove oxygen from the graphene network at room temperature. The presence of iodine moieties in the graphene network was confirmed using various techniques such as XPS photoelectron spectroscopy, HR‐TEM, XRD, FT‐IR, TGA, and Raman spectroscopy. The high iodine content of the material enhanced the d‐spacing and ion mobility of the electrolyte, thereby improving the storage capacity. In addition, the potential of iodinated graphene as an electrode material was investigated through EIS, CV, and GCD using 1 M H2SO4 solution as the electrolyte. The iodinated graphene material exhibited EDL capacitance and demonstrated an impressive specific capacitance of 535.4 F g−1 at a high rate, with a current density of 1 A g−1. Moreover, it exhibited exceptional stability over 5000 cycles. These halogenated graphene derivatives are attractive options for use in supercapacitors.