Performance Evaluation of Hydrothermally Prepared Ce-doped SrSnO3 for Electrochemical Energy Storage

Abstract

Perovskite-based nanostructures have been widely researched for supercapacitors, resulting in their outstanding conductivity, electrochemical features, minimal cost, and eco-friendliness. However, this study aims to compare the electrochemical activity of strontium tin oxide (SrSnO₃) and Ce-doped SrSnO₃ created by a one-pot hydrothermal procedure. The as-prepared materials were thoroughly analysed for their structure, chemical composition, and capacitive performance. The X-ray diffraction analysis indicated that the SrSnO₃ phase had a cubic crystal system. The capacitance, charge/discharge rate, and rate capability of SrSnO₃ were improved by cerium doping. The Ce-doped SrSnO₃ showed exceptional super-capacitive activity with a specific capacitance (C_sp) of 1155 F/g, specific energy (S_E) of 48 Wh/kg, and specific power (S_P) of 308 W/kg at a 1 A/g current density (j). Additionally, the doped material exhibited lower internal resistance than the undoped sample. The remarkable performance of the doped material was accredited to increased active sites, conductivity, electroactive surface, and a high ion diffusion rate. The advantageous characteristics of Ce-doped SrSnO₃ render it a potential material for electrochemical devices. However, the results provide a solid basis for creating advanced supercapacitor electrodes with more remarkable performance. Therefore, this work enhances our understanding of perovskites and demonstrates their potential use in electrochemistry, particularly for energy storage.