| Autor: |
Jensen, Steffen R. H., Jørgensen, Mathias, Thi Phuong Thao Nguyen, Nolan, Greg, Buckley, Craig E., Jensen, Torben R., Paskevicius, Mark |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 5/7/2024, Vol. 53 Issue 17, p7619-7627, 9p |
| Abstrakt: |
Metal hydroborates and their derivatives have been receiving attention as potential solid-state ion conductors for battery applications owing to their impressive electrochemical and mechanical characteristics. However, to date only a fraction of these compounds has been investigated as solid-state electrolytes. Here, MB12H11NH3 (M = Li and Na) hydroborates are synthesized and investigated as electrolyte materials for all-solid-state batteries. The room temperature #945;-NaB12H11NH3 was structurally solved in P212121 (a = 7.1972(3) Å, b = 9.9225(4) Å, and c = 14.5556(5) Å). It shows a polymorphic structural transition near 140 °C to cubic Fm3m. LiB12H11NH3 and NaB12H11NH3 exhibit cationic conductivities of σ(Li+) = 3.0 × 10-4 S cm-1 and σ(Na+) = 1.2 × 10-4 S cm-1 at 200 °C. Hydration is found to improve ionic conductivity of the hydroborates. It is presumed that modest ionic conductivities could be due to a lack of significant reorientational dynamics in the crystal structure resulting from the presence of the bulky -NH3 group in the anion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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