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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This paper studied structures of ceria-carbonate two-phase composites, with an emphasis on the interfacial structures and interactions between the two constituent phases of ceria and carbonate. The phase structure was analyzed by DSC, XRD and SEM. The IR measurements were carried out to identify the bonding situations and interfaces. Some new absorptions and wavenumber shifts of the bands appeared in IR spectra. There are strong indications of the interfacial phenomena exist in the two-phase composites through comparison between the two-phase composite with each individual constituent phases. The results opened a new interesting subject on the two-phase composite structures with significant importance for applications in advanced low temperature (300-600°C) SOFC.

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