Electrodeposition of aluminum–magnesium alloys from an aluminum-containing solvate ionic liquid at room temperature

An aluminum-containing solvate ionic liquid, DMI–AlCl 3 (1 M)–MgCl 2 (0.5 M) was used as the electrolyte for magnesium electrodeposition. The results of Raman spectroscopy and 27 Al nuclear magnetic resonance spectroscopy indicated the existence of aluminum-containing [AlCl 4 ] - and [AlCl 2 (DMI) 4 ] + in the DMI–AlCl 3 (1 M) system. When 0.5 M MgCl 2 was added to DMI–AlCl 3 , the Mg(II) species was [MgCl(DMI) n ] + . X-ray diffraction analysis indicated that a coating of Al 3 Mg 2 can be prepared by potentiostatic electrodeposition at −1.45 V (vs. Al) at 323 K on a copper sheet cathode.