Li ion diffusion in LiAlO2 investigated by Raman spectroscopy

The temperature dependence of Li ions behavior of γ-LiAlO2 has been studied from 78 to 873 K. On heating, the Li ions underwent positional disordering along the structural channels, with the Li ions related modes at 220, 366 and 400 cm−1 broadening and weakening dramatically. An anomalous maximum in...

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Bibliographic Details
Published in:Solid state sciences 2014-11, Vol.37, p.103-107
Main Authors: Hu, Qiwei, Lei, Li, Jiang, Xiaodong, Feng, Zhe Chuan, Tang, Mingjun, He, Duanwei
Format: Article
Language:English
Subjects:
Activated
Bandwidth
Channels
Condensed matter: structure, mechanical and thermal properties
Diffusion in solids
Exact sciences and technology
Heating
Ion diffusion
Li diffusion
LiAlO2
Lithium
Mathematical models
Physics
Raman spectroscopy
Temperature dependence
Transport properties of condensed matter (nonelectronic)
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Summary:The temperature dependence of Li ions behavior of γ-LiAlO2 has been studied from 78 to 873 K. On heating, the Li ions underwent positional disordering along the structural channels, with the Li ions related modes at 220, 366 and 400 cm−1 broadening and weakening dramatically. An anomalous maximum in the bandwidths of the Li ions related modes is observed. It should be apparent that there are at least two distinct thermally activated processes. A model suggested by Andrade and Porto is used to describe the linewidth of a phonon. [Display omitted] •The Li ions undergo positional disordering along the structural channels on heating.•An anomalous maximum in the bandwidths of the Li ions related modes is observed.•A model is used to describe the linewidth of a phonon.•The activation energy of Li ions is about 0.5 eV.
ISSN:1293-2558
1873-3085
DOI:10.1016/j.solidstatesciences.2014.08.017