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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction and Processing
Presentation Title Electrochemical Cell Design for Emf Measurements of Liquid Nd-Bi Alloys via Coulombic Titration in LiCl-KCl-NdCl3 Electrolyte
Author(s) Sanghyeok Im, Nathan D. Smith, Stephanie Castro Baldivieso, Hojong Kim
On-Site Speaker (Planned) Sanghyeok Im
Abstract Scope Electrochemical properties of liquid Bi and Sn electrodes for Nd recovery were investigated in LiCl-KCl-NdCl3 at 773−973 K using a three-electrode configuration: a two-phase Nd-Sn alloy as the reference electrode and a liquid Nd-Bi alloy as the counter electrode. The electrode potentials of the liquid metals were measured during Nd deposition/removal cycles at various current densities to estimate round-trip coulombic efficiencies and to characterize current-dependent overpotentials. The overpotential measurements were corroborated by electrochemical impedance spectroscopy to study interfacial charge transfer and mass transport kinetics of liquid metal electrodes during electrolysis. After Nd electrodeposition experiments, the composition of the electrode was analyzed by inductively coupled plasma atomic emission spectroscopy (ICP-AES), and the recovery efficiency of Nd metal was estimated according to Faraday's law.
Proceedings Inclusion? Planned:
Keywords Electrometallurgy, Extraction and Processing, Recycling and Secondary Recovery

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