Mascarenhas, F.J.Rodney, J.D.Rao, L.Kim, B.C.Badekai Ramachandra, B.R.2026-02-032024Electrochimica Acta, 2024, 507, , pp. -134686https://doi.org/10.1016/j.electacta.2024.145133https://idr.nitk.ac.in/handle/123456789/20754In this work, we report a facile two-step electrodeposition method to fabricate a CoMnS/NiCo<inf>2</inf>S<inf>4</inf>/NF (CMS/NCS/NF) composite on nickel foam (NF) for application of supercapacitor electrode. The electrochemical performance of this composite material has been extensively investigated, revealing superior performance compared to individual CMS/NF and NCS/NF materials. The CMS/NCS/NF composite exhibits an exceptionally high specific capacity of 707 C/g at a current density of 1 A/g in a three-electrode system. Remarkably, the material retains 92 % of its specific capacitance after 5000 cycles, indicating excellent cyclic stability and durability. To further explore its practical applications, we constructed a two-electrode symmetric supercapacitor using the CMS/NCS/NF electrode. This symmetric cell demonstrates an outstanding energy density of 97.5 Wh/kg and a peak power density of 12 kW/kg, underscoring its potential for high-performance energy storage applications. These comprehensive studies indicate that the synthesized CMS/NCS/NF is a highly promising candidate for supercapacitor electrodes, offering both high capacity and long-term stability. This work paves the way for the development of efficient and durable energy storage devices. © 2024 Elsevier LtdElectrodepositionNanocompositesCoMnS/nico2S4Electrodeposition methodsEnergy densityPower densitiesPower density and energy densityPower energySpecific capacitiesSupercapacitor electrodesTwo step electrodeposition methodTwo-step electrodepositionsCapacitor storage