Application of GO-integrated CeMnO3 composite for high-efficiency electrochemical process

Abstract

Energy conversion and storage technologies are currently receiving a lot of attention because they offer solution for growing energy problems. The present work reported on the fabrication of CeMnO₃/GO nanocomposite through a hydrothermal method. Different analytical strategies have been employed for the physical and electrochemical analysis. The capacitance (C_s) values of prepared composite were 1106 F/g with specific energy (S_E) 62 Wh/Kg and specific power (S_P) 315 W/kg at current density 1 A/g which showed stability even after 3000th cycle for 50 h. The synthesized CeMnO₃/GO composite possessed overpotentials (η) of 213 mV and Tafel slope value of 36 mV/dec determined from CV analysis for water splitting studies. The addition of graphene oxide to CeMnO₃, improves interfacial area and facilitates faster charge transport which results improvement in electrochemical performance. The Nyquist plot examines smaller charge transfer resistance value of 0.87 Ω for CeMnO₃@GO nanocomposite. The material's remarkable stability suggested its potential for storing energy for supercapacitor applications.