Date of Award
Master of Science (MS)
The main objective of the thesis is to understand the effect of morphologies and electrolytes on the electrochemical properties of cobalt sulfides. The nanostructured cobalt sulfides were synthesized by a facile hydrothermal method. For this, cobalt nitrate Co(NO3)2.H2O, cetyl trimethylammonium bromide (CTAB), thioacetamide (TTA), poly (vinyl pyrrolidone) (PVP) and ethylene glycol were used. The effect of growth parameters such as solvent and presence of surfactants on the size and morphology of the cobalt sulfides were investigated. It was observed that these variations could provide cobalt sulfides with a range of sizes, shapes and morphologies. The nanostructured cobalt sulfides were structurally and electrochemically characterized using various techniques. The structural characterizations were performed using X-ray diffraction (XRD) technique. The XRD analysis showed mixed phases of cobalt sulfides such as CoS and CoS2. The morphology and size of the cobalt sulfides were studied using scanning electron microscopy (SEM). It was observed that the morphology and the size of the cobalt sulfides depend on the growth conditions. The crystallite size of the cobalt sulfide was estimated using XRD data. Energy-dispersive X-ray spectrometer (EDS) was used to further confirm the cobalt sulfide formation.
Alqurashi, Esam, "Facile Synthesis and Electrochemical Analysis of Cobalt Sulfide Nanostructures for Supercapacitor Applications" (2015). Electronic Thesis Collection. Paper 32.