Isothermal transient ionic current as a characterization technique for ion transport in Ta2O5

The Isothermal Transient Ionic Current (ITIC) technique was applied to β-Ta2O5 samples made by chemical vapor deposition. The mobility, conductivity, and number of protons in the material could be extracted from the measurements. Li ions were intercalated electrochemically into the β-Ta2O5 and it wa...

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Bibliographic Details
Published in:Journal of applied physics 1999-06, Vol.85 (12), p.8199-8204
Main Authors: Mattsson, M. Stro/mme, Niklasson, G. A.
Format: Article
Language:English
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Summary:The Isothermal Transient Ionic Current (ITIC) technique was applied to β-Ta2O5 samples made by chemical vapor deposition. The mobility, conductivity, and number of protons in the material could be extracted from the measurements. Li ions were intercalated electrochemically into the β-Ta2O5 and it was found that the ITIC method could separate the contribution from proton and Li ion conduction in such a way that the mobilities of both species could be extracted. Furthermore, the lattice-gas model [A. J. Berlinsky, W. G. Unruh, W. R. McKinnon, and R. R. Haering, Solid State Commun. 31, 135 (1979)] was employed to describe the Li interaction process. This model showed that the Li ions tended to distribute uniformly, rather then to attract each other and form clusters in the material.
ISSN:0021-8979
1089-7550
1089-7550
DOI:10.1063/1.370694