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The electrochemical behavior of Li + was studied at the inert and active electrodes in the molten LiCl-KCl eutectic. Transient electrochemical techniques, such as cyclic voltammetry, chronoamperometry and chronopotentiometry were used in order to explore the deposition mechanism of Li. The reduction process of Li + is irreversible and the diffusion coefficient of Li + at 723 K was determined as 6.68(±0.07) × 10 −6 cm 2 s −1 . During the electrodeposition process of Li, the electrocrystallization played an important role. The chronoamperometric studies indicated that instantaneous nucleation existed during the electrodeposition process of Li metal. At a Mg electrode, the electroreduction of Li + takes place at a less cathodic potential values than that at Mo electrode which indicated the formation of Mg-Li alloy. The Mg-Li alloy films with different crystal phase were obtained by potentiostatic electrolysis, and the samples were characterized by X-ray diffraction and scanning electron microscopy.

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