The Effect of Temperature on Electrodeposition Behavior of Cobalt from Cobalt Chloride Using 2:1 Urea/ChCl Ionic Liquid

The electrodepositionElectrodeposition of cobaltCobalt from cobaltCobalt chloride using eutectic mixture of urea and choline chloride in the molar ratio 2:1 was investigated. The effect of temperatureTemperature on the cathodic current density, energy consumption, crystalline orientation, and surface morphology was studied. At applied potential of 3.0 V and CoCl2 concentration of 0.2 M, temperatureTemperature was varied in the range of 343 K and 383 K to determine the best experimental condition to obtain higher current density. The current density value increased from 24 A/m2 at 343 K to 140 A/m2 at 383 K. This rise was attributed to increased conductivity of electrolyte and better mobility of ions at higher temperatureTemperature. The energy consumption of 4 kWh/kg was obtained at 383 K. XRDX-ray diffraction (XRD) confirms the presence of pure cobaltCobalt in all the samples. The surface morphology of the deposits showed that there is a significant grain growth at higher temperatureTemperature due to thermal activation increasing the diffusion of ions.