Exploring hydrothermal route for Mo-doped ZnMn2O4 ternary metal oxides electrode materials for supercapacitors

• Published in: Journal of materials science. Materials in electronics Vol. 36; no. 17; p. 1056
• Main Authors: Sharma, Pankaj Kumar, Sahai, Anshuman, Maikhuri, Deepti, Uke, Santosh J., Asthana, Somya, Kumar, Yogesh
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2025; Springer Nature B.V
• Subjects: Capacitance; Characterization and Evaluation of Materials; Chemistry and Materials Science; Electrode materials; Electrodes; Materials Science; Metal oxides; Optical and Electronic Materials; Oxidation; Supercapacitors; Surface roughness; Synthesis; Zinc compounds
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-025-15157-4

Supercapacitors (SCs) are crucial in meeting the growing energy demands. To improve the performance of metal oxide-based SCs, electrode materials with strong electrocapacitive properties must be designed. The production of electrode materials for SCs has been the subject of numerous articles published recently. Compared to single component metal oxides, ternary metal oxides (TMOs) have more oxidation states and perform better as super capacitor. In this work, we present pure and Mo-doped ZnMn 2 O 4 ternary metal oxides synthesized by hydrothermal process for designing electrode materials for supercapacitor applications. The ZnMn 2 O 4, ZnMn 0.98 Mo 0.02 O 2 and MnZn 0.98 Mo 0.02 O 2 delivers a good specific capacitance of 405.95 Fg −1 , 455.35 Fg −1 and 578.57 Fg −1 , respectively, at a scan rate of 5 mVs −1 . The as-synthesized electrode materials exhibit energy density of 20.29 WhKg −1 at a power density of 308 WKg −1 for pure sample, while 22.76 WhKg −1 energy density at a power density of 309 WKg −1 and 28.92 WhKg −1 energy density at power density of 318.34 WKg −1 for doped samples ZnMn 0.98 Mo 0.02 O 2 and MnZn 0.98 Mo 0.02 O 2, respectively. Additionally, as-prepared device exhibit excellent cyclic stability of 93.80%, 96.20% and 97.10% after 10,000 cycles of charge and discharge for sample S1, S2 and S3, respectively. The higher values of specific capacitance and doping of Mo in ZnMn 2 O 4 results in enhanced surface roughness, which further raises active surface for promising supercapacitive applications.