Composite hydroxide mediated synthesis of barium-doped strontium oxide nanostructures for energy storage applications

Abstract

Strontium oxide nanostructures (SrO NSs) have garnered intensive research captivation among scientists owing to their higher specific energy, tunable material properties, and quick reversible reactions. However, low conductivity and poor cyclical stability hinder their use in energy storage devices, especially in supercapacitors. Since doping is an effective way to enhance the performance of electrodes for electrochemical energy storage devices. Therefore, in this study, we report the synthesis of Barium-doped Strontium Oxide nanostructures (Ba-doped SrO NSs) using a composite hydroxide-mediated approach. Pure SrO NSs delivered the specific capacitance of 178 F/g at the current density of 1 A/g. The doping of Ba into SrO drastically improves the storage capacity. The 4% Ba-SrO NSs delivered the specific capacitance of 826 F/g at the current density of 1 A/g along with a high-power density of 250 W/Kg at an energy density of 28.68 Wh/Kg. Compared to conventional materials, Ba-doped SrO NSs demonstrated improved electrochemical stability, enhanced rate capability, and reduced impedance. The additional electroactive sites and extra electrons from Ba doping are key to these improvements. This study underscores the potential of Ba-doped SrO NSs for high-performance energy storage, offering significant advancements in electrochemical performance and stability.