Exploring the potential of Withania somnifera-mediated Ag/Mn3O4 nanocomposites as electrode material for high-performance supercapattery device

Background: In this work, a bioengineered symmetric electrode material (anode, cathode) for energy storage devices was successfully demonstrated. Methods: Using Withania somnifera, Ag/Mn3O4 nanocomposite was prepared through sol-gel-assisted green synthesis. Physicochemical properties of Ag/Mn3O4, 431 nm (Ag), 315 nm (Mn3O4) in UV-visible analysis, metal (Ag) and metal oxide (Mn3O4) bonds, crystallinity index with a crystallite size of similar to 29 nm from the XRD studies, rod-like morphology (SEM analysis), elemental composition (EDAX analysis), and chemical states (Ag 3d and Mn 2d) were identified through XPS studies. Significant findings: The cyclic voltammetry profiles of Ag/Mn3O4 exhibit the supercapattery behaviour with a specific capacitance of 254 F/g at a scan rate of 5 mVs(-1) and a cyclic retention of 92.3 %. The fabricated symmetric supercapattery device (SSD) has an energy density of 18.5 Whkg(-1) and a power density of 2084 Wkg(-1). The stability of the complex is also studied in theoretically.