Unraveling the influence of transitional elements in the manganite framework for high-performance supercapacitor

• Published in: Journal of materials science. Materials in electronics 2024-11, Vol.35 (31), p.2003, Article 2003
• Main Authors: Galeb, W., Benny, Sonnu, Rodney, John D., Senthil, S., Arulmozhi, S.
• Format: Article
• Language: English
• Subjects: Alternative energy; Capacitance; Carbon; Characterization and Evaluation of Materials; Chemistry and Materials Science; Electric vehicles; Electrochemical analysis; Electrode materials; Electrodes; Electrolytes; Energy storage; Materials Science; Metal oxides; Nanoparticles; Optical and Electronic Materials; Physics; Stability; Supercapacitors; Toxicity
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-024-13726-7

Super-capacitor is a well-competing energy storage system that involves fast-charging capability, a long-life cycle, stability, and good retention. Here, we examine solution combustion-derived AMn 2 O 4 (A = Ni, Cu, Co, Zn) nanoparticles as a good supercapacitor electrode material. The electrochemical performance in a 2 M aqueous KOH electrolyte was investigated to find out the best working electrode with excellent activity. Out of all possibilities tested, NiMn 2 O 4 delivered the utmost specific capacitance of 448.82 F g −1 at 50 mVs −1 . galvanostatic charge–discharge studies also confirmed that NiMn 2 O 4 had a higher specific capacitance of 598.61 F g −1 at 0.5 A g −1 with energy and power density of 182.31 Wh/kg and 0.20 kW/kg, respectively. Furthermore, NiMn 2 O 4 after 5000 cycles showed excellent long-term cyclic stability, maintaining an impressive retention capability of 96.68%. The results demonstrated that NiMn 2 O 4 electrode had good stability and electrochemical reversibility, as well as specific capacity dependent on the type of transitional metal oxides.