Investigation of the effect of surfactant type an‎d amount on the microstructure, structure an‎d electrochemical properties of (MMoS4(M=Ni,Co) synthesized by sol-thermal method for supercapacitor application

2/1/2026 12:00:00 AM

Due to their outstan‎ding properties such as high power densities an‎d very long lifetimes, supercapacitors have attracted attention in the field of energy storage in recent years. The performance of supercapacitors is significantly dependent on the characteristics of the electrode used. In this study, two-step solvothermal synthesis of NiMoS4 an‎d Ni0.5 Co0.5 MoS4 electrodes was carried out on a nickel foam substrate. In the NiMoS4 electrode material, the effect of the type an‎d amount of surfactant (CTAB an‎d PVP), the step of adding the surfactant, an‎d the change of the nickel precursor to cobalt were investigated. The phase characterization of the powders obtained from the second-stage synthesis was carried out by X-ray diffraction analysis an‎d the reconstruction of the electrodes coated with the electrode material was carried out by scanning electron microscopy. Based on the results obtained from the analyses, the sulfide phase was identified after the second-stage synthesis. The electrochemical performance of the samples was investigated using cyclic voltammetry, galvanostatic charge-discharge, an‎d electrochemical impedance spectroscopy. Synthesis of NiMoS4 sample using 0.7 mmol CTAB in 9-aqueous sodium sulfide solution resulted in the formation of the most suitable sample with needle-shaped microstructure an‎d charge capacity of 1231.11 Farad/g at a current density of 1 A/g with lower resistance shutters than the sulfide material. Also, by changing the surfactant an‎d using PVP, the most suitable electrode was formed with 0.7 mmol PVP, which had needle-shaped microstructure an‎d remarkable electrochemical properties an‎d charge capacity of 727.7 Farad/g at a current density of 1 A/g. The most suitable coated samples were used as positive electrode an‎d coated activated carbon as negative electrode in the asymmetric supercapacitor. The fabricated supercapacitor has a density of 26.28 Wh per capacity, a power density of 1125 Wh per capacity, an‎d the ability to retain 100% of the initial capacity after 5000 charge-discharge cycles.

سنتز سولووترمال , سورفكتانت , NiMoS4 , PVP , CTAB , ابرخازن نامتقارن

Solvothermal synthesis , surfactant , NiMoS4 , CTAB , PVP , asymmetric supercapacitor

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