Abstract
Conductive ceramics are being developed to replace current Pt anodes in the electrolytic reduction of spent oxide fuels in pyroprocessing. While several conductive ceramics have shown promising electrochemical properties in small-scale experiments, their long-term stabilities have not yet been investigated. In this study, the chemical stability of conductive La 0.33 Sr 0.67 MnO₃ in LiCl-Li₂O molten salt at 650℃ was investigated to examine its feasibility as an anode material. Dissolution of Sr at the anode surface led to structural collapse, thereby indicating that the life time of the La 0.33 Sr 0.67 MnO₃ anode is limited. The dissolution rate of Sr is likely to be influenced by the local environment around Sr in the perovskite framework.
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