Effect of the Li Reduction to Electrodeposition of Nd-Sn Compounds in Liquid Sn Electrode in LiCl-KCl-NdCl3Melt

Chenteng Sun, Qian Xu*, Yongxiang Yang, Xingli Zou, Hongwei Cheng, Xionggang Lu

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The electrochemical behaviors of Li+ and Nd3+ were investigated on W, liquid Sn pool and Sn film electrodes in LiCl-KCl-NdCl3 melt at 673 K. Various electrochemical techniques, such as cyclic voltammogram, square wave voltammogram, and open circuit chronopotentiometry, were conducted to evaluate the electrochemical behaviors of Li+ and Nd3+. The reduction of Nd3+ was found to be a two-step process in the W electrode and a one-step process in the liquid Sn electrode. During the formation of the Nd-Sn intermetallic compounds, only the NdSn3 would be formed without the reduction of the Li+ in the liquid Sn electrode. When the reduction potential moves over -2.77 V vs Cl2/Cl-, the Li+ in the electrolyte would inevitable be reduced into the liquid Sn electrode. The Nd-Sn intermetallic compounds were deposited on the liquid Sn pool electrode at -2.74 V vs Cl2/Cl- in the LiCl-KCl-NdCl3 melts for 5 h. The products were characterized by SEM-EDS and XRD. The loose product on the surface of the deposition displayed the existence of NdSn3 in Nd-Sn intermetallic compounds. The high content of Nd inclusion formed by segregation was detected in the solidified Sn electrode.

Original languageEnglish
Article number102505
Number of pages7
JournalJournal of the Electrochemical Society
Volume168
Issue number10
DOIs
Publication statusPublished - 2021

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