1998 Fiscal Year Final Research Report Summary
Electrochemical Recovery and Isotope Separation of Lithium Employing Solid Electrolyte
| Project/Area Number |
08555153
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
ITOH Mitsuru Tokyo Institute of Technology, Materials and Structures Laboratory, Associate Professor, 応用セラミックス研究所, 助教授 (30151541)
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| Co-Investigator(Kenkyū-buntansha) |
IIJIMA Shigeru NGK Spark Plug CO., LTD., R & D Center, Manager, 調査部, 主査
INAGUMA Yoshiyuki Tokyo Institute of Technology, Materials and Structures Laboratory, Research Ass, 応用セラミックス研究所, 助手 (00240755)
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| Project Period (FY) |
1996 – 1998
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| Keywords | Lithium recovery / Isotope separation / Electrolysis / Solid electrolyte / ペロブスカイト |
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| Research Abstract |
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.
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[Publications] M.Itoh, J-D.Yu, T.Katsumata, Y.Inaguma, and T.Huang, Y.Inaguma, T.Katsumata, J-D.Yu, and M.Itoh: "Effect of Hydrostatic Pressure (<less than or equal>2GPa) on the Transport Properties in Perovskite-type " Proceedings of MRS Fall Meeting, Dec.2-6, Boston. 411-416 (1996)
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