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

Literature Information

Publication Date 2009-04-17
DOI 10.1039/B900175C
Impact Factor 3.676
Authors

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


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Abstract

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.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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