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Lewis acidic 1-allyl-3-methylimidazolium chloroaluminate ionic liquids were used as promising elec-trolytes in the low-temperature electrodeposition of aluminium.Systematic studies on deposition process have been performed by cyclic voltammetry and chronoamperometry.The surface morphology and X-ray diffraction(XRD) patterns of deposits prepared at different experimental conditions were also investigated.It was shown that the nu-cleation density and growth rate of crystallites had a great effect on the structure of aluminium deposited.The crys-tallographic orientation of deposits was mainly influenced by temperature and current density.Smooth,dense and well adherent aluminium coatings were obtained on copper substrates at 10-25 mA?cm?2 and 313.2-353.2 K.More-over,the current efficiency of deposition and purity of aluminium have been significantly improved,demonstrating that the ionic liquids tested have a prospectful potential in electroplating and electrorefining of aluminium.
Lewis acidic 1-allyl-3-methylimidazolium chloroaluminate ionic liquids were used as promising elec-trolytes in the low-temperature electrodeposition of aluminum. Systematic studies on deposition process have been performed by cyclic voltammetry and chronoamperometry. The surface morphology and X-ray diffraction (XRD) patterns of deposits prepared at different experimental conditions were also investigated. It was shown that the nu-cleation density and growth rate of crystallites had a great effect on the structure of aluminum deposited. Crys-tallographic orientation of deposits was primarily influenced by temperature and current density. Smooth, dense and well adherent aluminum coatings were obtained on copper substrates at 10-25 mA · cm -2 and 313.2-353.2 K. More-over, the current efficiency of deposition and purity of aluminum have been significantly improved, demonstrating that the ionic liquids tested have a prospectful potential in electroplating and electrofining of aluminum.