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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


A Comparative Study of Working Electrode Materials for Voltammetry Measurements in LiCl–Li2O Salts
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