Lithium-ion conduction in complex hydrides LiAlH4 and Li 3 AlH6

H. Oguchi, M. Matsuo, T. Sato, H. Takamura, H. Maekawa, H. Kuwano, S. Orimo

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Abstract

Lithium-ion conduction in complex hydrides LiAlH4 and Li 3 AlH6 was investigated using ac complex impedance measurements. The conductivities at room temperature were 8.7× 10-9 S/cm in the case of LiAlH4 and 1.4× 10-7 S/cm in the case of Li 3 AlH6. To enhance the conductivity of Li3 AlH6 having good thermal stability in heating/cooling cycles, mechanical milling, and addition of lithium halides (LiCl, LiI) were implemented. The maximum value of 2.5× 10-4 S/cm at 393 K was observed when 0.33 M ratio of LiI was added to Li3 AlH6. This study demonstrated two research directions to enhance the lithium-ion conductivity in a variety of complex hydrides.

Original languageEnglish
Article number096104
JournalJournal of Applied Physics
Volume107
Issue number9
DOIs
Publication statusPublished - 2010 May 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Oguchi, H., Matsuo, M., Sato, T., Takamura, H., Maekawa, H., Kuwano, H., & Orimo, S. (2010). Lithium-ion conduction in complex hydrides LiAlH4 and Li 3 AlH6. Journal of Applied Physics, 107(9), [096104]. https://doi.org/10.1063/1.3356981