Variation of mechanical properties of TiO2 during Li insertion

Date

2007-01-01

Author

Lindstrom, Henrik
Dericioğlu, Arcan Fehmi
Kamei, Masayuki
Kagawa, Yutaka

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TiO2 films were produced by low-temperature reactive magnetron sputtering and characterized by X-ray diffraction, atomic force microscopy, scanning electron microscopy, electrochemistry, and mechanical-indentation techniques. The TiO2 films consisted of 20-30 nm particles. Electrochemical Li-insertion experiments revealed that the Li diffusion along grain boundaries was much faster compared to the diffusion into the TiO2 grains. The mechanical properties of the films changed drastically after electrochemical Li insertion; the microhardness increase of the Li-inserted TiO2 samples was in the range 70-104% with maximum values ranging between 5.8 and 6.5 GPa. Hardness measurements on a Li-extracted sample showed that the changes in mechanical properties were irreversible. (c) 2007 The Electrochemical Society.

Subject Keywords

Physical and Theoretical Chemistry, Electrical and Electronic Engineering, Electrochemistry, General Materials Science, General Chemical Engineering

URI

https://hdl.handle.net/11511/34488

Journal

ELECTROCHEMICAL AND SOLID STATE LETTERS

DOI

https://doi.org/10.1149/1.2666774

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

H. Lindstrom, A. F. Dericioğlu, M. Kamei, and Y. Kagawa, “Variation of mechanical properties of TiO2 during Li insertion,” ELECTROCHEMICAL AND SOLID STATE LETTERS, pp. 0–0, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34488.