Anharmonicity in LiBH4-LiI induced by anion exchange and temperature

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. © 2010 American Institute of Physics.


Published in:
Applied Physics Letters, 97, 3
Year:
2010
ISSN:
0003-6951
Note:
Times Cited: 18
Laboratories:




 Record created 2015-03-03, last modified 2018-01-28


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