Facile fabrication of AgFeS2 nanostructure via hydrothermal route for supercapacitor application

Abstract

This study presents the electrochemical performance of AgFeS2 as an electrochemical energy storage material, highlighting its notable attributes such as exceptional electrical conductivity and abundant availability. AgFeS2 nanostructure was successfully fabricated utilizing single-step hydrothermal technique. Physiochemical characterization and electrochemical characterization, are both performed on the synthesized AgFeS2 nanostructure. An AgFeS2 sample on a nickel foam substrate was used to investigate the capacitance property of the materials. The Ag and Fe ions provide a synergistic contribution to the redox process that accelerates the electrochemical efficacy of the supercapacitor. An AgFeS2 nanostructure in a three-electrode system's galvanometric charge-discharge (GCD) profile showed a large specific capacitance (Cs) of 555 F g−1 @ 1 A g−1 in the potential range of 0 to 0.7 V (Ag/AgCl) and capacitive retention of 87 % over 7000th in 2.0 M KOH. The symmetric analysis depends on the AgFeS2 electrode has a high CS of 331 F g−1 at 1 A g−1 in an aqueous 2.0 M KOH in a two- electrode system. The AgFeS2 electrode-based symmetric supercapacitor has a specific power of 0.261 W kg−1 and a specific energy of 45 Wh kg−1. The capacitive results indicates that the AgFeS2 electrode is potential candidate for supercapacitor applications and it can also be employed in various fields such as water splitting, water remediation and photocatalysis.