Anharmonicity in LiBH4-LiI induced by anion exchange and temperature

A. Borgschulte, R. Gremaud, S. Kato, N. P. Stadie, A. Remhof, A. Züttel, M. Matsuo, S. I. Orimo

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20 Citations (Scopus)


The feasibility of spatially resolved Raman spectroscopy probing diffusion multiples as a high-throughput method to study phase transformations in Li-ion conductors is demonstrated. The method is applied to the pseudobinary LiBH 4-LiI system, which shows high Li-ion conductivity in the HT-phase of LiBH4. The vibrational properties measured as a function of composition and temperature corroborate the formation of a solid solution of Li (BH4)1-cIc over nearly the entire phase diagram (0<c0.8±0.2). The results shed light on anharmonic effects responsible for the structural phase transformation in this system.

Original languageEnglish
Article number031916
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2010 Jul 19


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