Time-domain electrostatic force spectroscopy on nanostructured lithium-ion conducting glass ceramics: analysis and interpretation of relaxation times

文献情報

出版日 2009-04-17

DOI 10.1039/B900175C

インパクトファクター 3.676

著者

Ahmet Taskiran, André Schirmeisen, Harald Fuchs, Hartmut Bracht, Bernhard Roling

原文を見る

要旨

The nanoscopic electrical properties of LiAlSiO4 glass ceramics with different degrees of crystallinity χ were studied by means of time-domain electrostatic force spectroscopy (TDEFS). Thereby, a faster relaxation process due to lithium ion movements in the glassy phase and a slower process due to lithium ion movements in the crystallites could be distinguished. Over a broad range of crystallinity values, the TDEFS relaxation times of both processes are Arrhenius activated, with an activation energy being essentially independent of χ and with a pre-exponential factor depending in a systematic fashion on χ. With increasing crystallinity, the pre-exponential factor of the faster process (glassy phase) increases, while that of the slower process (crystallites) decreases. In order to explain this observation, we consider simple equivalent circuit models for the capacitance relaxation of the system AFM tip/gap/sample.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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