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.
ASJC Scopus subject areas
- Physics and Astronomy(all)