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Meeting 2027 TMS Annual Meeting & Exhibition
Symposium Materials and Chemistry for Molten Salt Systems
Presentation Title Electrochemical Stability of SnO2 Oxygen-Evolving Anode in Molten LiCl-Li2O at 650 °C
Author(s) Md Ikram Khan, Mir Rafsan, Arezo Mahdavi Varposhti, Peyman Asghari-Rad, Hojong Kim
On-Site Speaker (Planned) Md Ikram Khan
Abstract Scope Oxygen-evolving anodes are critical for the sustainable electrochemical reduction of metal oxides in molten salts; however, low-cost, chemically stable materials remain limited. This study evaluates conductive tin oxide (SnO2) as an oxygen-evolving anode in molten LiCl-Li2O electrolyte at 650 °C. Cyclic voltammetry and chronoamperometry identify a voltage window that enables selective oxygen evolution without chlorine formation. Post-electrolysis analysis under constant current reveals the formation of a Li2SnO3 surface layer, indicating partial chemical interaction with the electrolyte. Despite this phase formation, the anode retains its structural integrity and stable electrochemical performance over 50 h, with no observable macroscopic degradation. These results demonstrate that SnO2 can sustain oxygen evolution without rapid degradation, highlighting its potential as a cost-effective alternatives to precious metal anodes in molten LiCl-Li2O systems.
Proceedings Inclusion? Planned:
Keywords Environmental Effects, High-Temperature Materials, Pyrometallurgy

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