ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Hydrothermal fabrication of Mo-doped NiMnO₃ perovskite electrode for high-performance supercapacitors

Shaimaa A. M. Abdelmohsen, Haifa A. Alyousef, Areej Saleh Alqarny, Najla Alotaibi, Younis Ejaz, Muhammad Imran, and Muhammad Abdullah

Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia

E-mail: younisejaz507@gmail.com

Received: 13 August 2025  Accepted: 27 August 2025

Abstract:

Researchers are looking into alternate energy sources due to the exhaustion of fossil fuels, energy crisis, and environmental challenges, although supercapacitors (S_c) are promising energy storage devices due to their efficient specific capacitance (C_s), extended cycle life, and enhanced power delivery. The NiMnO₃ and Mo-doped NiMnO₃ electrode material was successfully created using a practical and effective hydrothermal process. The physical characterization of Mo-doped NiMnO₃ demonstrated that Mo doping altered the shape of NiMnO₃ material. Electrochemical investigation of Mo-doped NiMnO₃ exhibited substantial C_s of 684 F/g obtained at current density (C_d) of 1 A/g. The observed outcomes demonstrate an energy density (E_d) value of 11.11 Wh/kg, a significant increase in ion diffusion efficiency, and outstanding power density (P_d) of 171 W/kg at 1 A/g. Furthermore, fabricated Mo-doped NiMnO₃ exhibited low impedance and remarkable 50-h cycling stability after 2500th cycles. The exceptional specific capacitance and extended cycle life of Mo-doped NiMnO₃ electrodes make it a potential material for next-generation supercapacitors.

Keywords: Mo-doped NiMnO3; Perovskite; Supercapacitor; Pseudocapacitive nature; KOH

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-04357-1

Chemical Papers 79 (12) 8881–8891 (2025)