Electrochemical Recovery and Isotope Separation of Lithium Employing Solid Electrolyte

以电化学回收锂及其同位素分离为目的，考察了高锂离子导体（La, Li）TiO_3作为固体电解质分离器应用的可行性。离子取代（La, Li）TiO_3表明（La, Li）TiO_3是作为固体电解质的最佳材料。利用坩埚和球团对电池进行电解。Pt，蒸馏水| Li^+ | LiCl溶液，Pt.锂离子被回收到阳极，但电解效率低于80%，这是由于电解过程中质子混入电解液所致。在电解过程中，有时发现电解液内部会形成裂纹。采用非水溶剂和细晶烧结体可以避免这些问题。对锂离子迁移过程的分子动力学模拟表明，前人实验结果推导出的输运机制对锂离子高电导率的演化至关重要。MD模拟也清楚地表明（La, Li）TiO_3的结构没有得到优化。

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.