Preparation of ternary Mg-Li-Sn alloys from molten salt by electrolysis

doi:10.11890/1006-7191-124-265

Abstract

Abstract: Electrochemical behavior of Mg, Li and Sn on tungsten electrodes in LiCl-KCl-MgCl₂-SnCl₂ melts at 873 K was investigated. Cyclic voltammograms (CVs) showed that the underpotential deposition (UPD) of magnesium on pre--deposited tin leads to the formation of a Mg-Sn alloy, and the succeeding underpotential deposition of lithium on pre-deposited Mg-Sn alloy leads to the formation of a Mg-Li-Sn alloy. Chronopotentiometric measurements indicated that the codepositon of Mg, Li and Sn occurs at current densities more negative than -1.16 A·cm^{- 2}. X-ray diffraction (XRD) indicated that Mg₂Sn phase is formed via galvanostatic electrolysis. The element Mg distributes homogeneously and Sn locates mainly on the grain boundaries in the Mg-Li-Sn alloy.

Key words: Mg-Li-Sn alloy, Molten salt, Cyclic voltammetry, Electrolysis

Peng CAO, Milin ZHANG, Wei HAN, Yongde YAN, Lijun CHEN. Preparation of ternary Mg-Li-Sn alloys from molten salt by electrolysis[J]. Acta Metallurgica Sinica (English Letters), 2012, 25(4): 265-271.

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Preparation of ternary Mg-Li-Sn alloys from molten salt by electrolysis

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