Enhanced performance of hydrothermally prepared Ag2Se/rGO nanosheet composite for energy storage applications

In recent years, there has been a significant focus on variable nanostructured supercapacitors within the research community, which heightened interest that attributed to the growing demand for renewable energy resources. To resolve these issues through the advancement of electrode materials, metal chalcogenides-based rGO nanocomposite have demonstrated significant potential across various sectors, including energy storage and conversion. The presents investigation involves the synthesis of an Ag2Se/rGO nanosheet composite as an electrode material using a facile hydrothermal route for structural, morphological and electrochemical characterizations. However, the electrochemical findings revealed that specific capacitance (Csp) of Ag2Se/rGO composite was determined to 1443 F/g at 1 A/g. Additionally, energy density (Ed) was 77.09 Wh/kg at power density (Pd) was recorded to 310 W/kg at a 1 A/g. Moreover, obtained result suggests that there was high efficiency of ion diffusion observed when there was a low charge transfer resistance (Rct = 0.54 Ω) between Ag2Se and rGO. In addition, it has been observed that the columbic efficiency (η = 96 %) of the Ag2Se/rGO composites electrode remains high even after undergoing 5000th charging-discharging cycles. This remarkable stability demonstrates the excellent life cycle stability and low charge transfer resistance of prepared materials. The results of this study indicate that the Ag2Se/rGO composite electrode exhibits significant potential as an anode material which can be effectively utilized in various energy storage applications.