Electrochemical Recovery and Isotope Separation of Lithium Employing Solid Electrolyte

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For the purpose of electrochemical recovery of Lithium and its isotope separation, feasibility of high Lithium ion conductor (La, Li)TiO_3 for the application of solid electrolyte separator was checked. Ion substitution for (La, Li)TiO_3 revealed that (La, Li)TiO_3 is the best material as a solid electrolyte. Using its crucibles and pellets, electrolysis was carried out for the cell.Pt, distilled water | Li^+ | LiCl solution, Pt.Lithium ion was recovered to the anode but electrolytic efficiency was less than 80%, which is attributed to the incorporation of proton into the electrolyte during electrolysis. Cracks were sometimes found to form inside the electrolyte during electrolysis. These problems are considered to be avoided by employing non-water solvent and fine-grained sintered body.Molecular dynamics simulation for the Lithium migration revealed that the transport mechanism deduced from the previous our experimental results is crucial for the evolution of high Lithium ion conductivity. The MD simulation has also clearly shown that the structure of (La, Li)TiO_3 is not optimized.