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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry IV
Presentation Title A Comparative Study of Working Electrode Materials for Voltammetry Measurements in LiCl–Li2O Salts
Author(s) Guoping Cao, Ammon Williams, Michael Shaltry
On-Site Speaker (Planned) Guoping Cao
Abstract Scope For safeguards purposes in reprocessing spent nuclear fuels, it is desired to monitor the uranium oxide reduction (OR) process in LiCl‒Li2O salt system, and cyclic voltammetry (CV) has been proposed for monitoring the OR process. For long term CV monitoring of the OR process, a corrosion-resistant, durable working electrode (WE) is needed. In this study, different materials including 316SS, tantalum, molybdenum, tungsten, platinum, and iridium were evaluated as potential WE materials based on chemical inertness and sensitivity in detecting Li2O and other chloride salts in the OR electrolyte. The experimental results show that (1) when operated in the cathodic potential, 316SS exhibits reasonable corrosion resistance and sensitivity; (2) iridium can be operated in both cathodic and anodic potentials and is the most corrosion resistant; and (3) platinum is limited to the anodic potential range, exhibits reasonably good corrosion resistance, and is the most sensitive to Li2O concentrations in the salt.
Proceedings Inclusion? Planned:
Keywords Electrometallurgy, Nuclear Materials, Recycling and Secondary Recovery

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Comparative Study of Working Electrode Materials for Voltammetry Measurements in LiCl–Li2O Salts
Advances in Solid Oxide Membrane Based Electrolysis for Solar-grade Silicon Deposition
Effect of Hydroxide and Oxide Impurities in Electrochemical Processes Using Molten LiCl and CaCl2
Electrochemical Reactions of Oxide Ions with Tungsten in Molten CaCl2
Feasibility of Potentiometry for Monitoring Activity of GdCl3 in Molten LiCl-KCl Salt
First-principles Molecular Dynamics and CALPHAD Modeling of the CaF2-MgF2-SiO2 Molten Salt System
Fundamental Challenges for the Development of Electrolytic Reduction of Uranium Oxide in Molten LiCl-Li2O
High-speed Electrodeposition of Textured Monolithic Lithiated Transition Metal Oxide Cathodes for Low Cost, High Energy, and Fast Charging Li-ion Batteries.
Interaction between Solute Species and Metallic Alloying Elements in Molten Chloride Systems
Investigation on Preparation of Fe-Al Alloys by Direct Reduction of Fe2O3-Al2O3 Powder in CaCl2-NaCl Molten Salt System
Liquid Bipolar Electrode for Extraction of Aluminium and PGM Concentrate from Spent Catalysts
Molten Hydroxide Mediated Electrosynthesis of Layered Transition Metal Oxides for Electrochemical Energy Storage
New Electrochemical Deoxidation Method of Ti Metal in Molten Salts Containing YCl3
Optimizing Reaction Selectivity in High Temperature Molten Electrolytes
Selective Extraction of Gold from Gold-copper Alloy Using Anodic Electrochemical Deposition in Molten Salt Electrolyte
Validated Modeling of Quartzite Reduction to Solar Silicon by Molten Salt Electrolysis

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