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Graduate Research

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Nanostructured CoS2 was synthesized by a facile hydrothermal method. The effect of growth parameters such as solvent and presence of surfactants on the size and morphology of CoS2 was investigated. It was observed that these variations could provide CoS2 with range of sizes, shapes and morphologies. The nanostructured CoS2 were structurally and electrochemically characterized. The structural characterizations were performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochmical measurements were performed in a standard three electrode cell containing a platinum wire as a counter electrode, a saturated calomel electrode as a reference electrode and CoS2 on nickel foam as a working electrode. The potential application of these materials for supercapacitor was tested using cyclic voltammeter and galvanosatic charge discharge method. It was observed the specific copacitance of 335 F/g was observed in 3 M NaOH electrode. The electrochemical stability of these electrodes were also investigated. The results suggest that CoS2 could be used as an electrode material for fabrication of supercapacitor devices. Note: This material is based upon work supported by the National Science Foundation under Award No. EPS-0903806 and matching support from the State of Kansas through the Kansas Board of Regents.


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