Abstract
Information regarding the electrochemical behavior of sulfide ions in molten salts is important for questions of battery technology in the case of high-temperature secondary batteries, and for metallurgical molten-salt processes. The present investigation is concerned with the electrochemical behavior of sulfide in molten LiF-NaF. The investigation has the objective to evaluate the feasibility of the LiF-NaF melt as solvent for the electrolysis of Al2S3. The results are presented of a voltammetric study of the electrochemical oxidation of sulfide in LiF-NaF eutectic at 1023 K. It is found that the anodic oxidation of sulfide ions in LiF-NaF eutectic is reversible and diffusion controlled. The obtained experimental data correspond to the reaction mechanism 2S(2-) yields reversibly S2(2-) + 2e(-).
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