期刊
ELECTROCHIMICA ACTA
卷 143, 期 -, 页码 340-346出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.08.016
关键词
Titanium dioxide nanotube array; Aluminum ion batteries; Chloride ion
资金
- College of Chemistry and Chemical Engineering of the Central South University
- Department of Materials Science & Engineering, South University of Science and Technology of China
The titanium dioxide nanotube array (TiO2-NTA) is prepared by a two-step anodic oxidation method and annealed at 450 degrees C subsequently. The Al-inserted TiO2-NTA is prepared by polarizing the TiO2-NTAs electrode at 0.4 mA for 2 min in 1 mol/L AlCl3. The results show that the Al-inserted sample still remains pure anatase TiO2 phase (by XRD) and keeps intact nanotube array structure (by FE-SEM). The X-ray photoelectron spectroscopy (XPS) analysis indicates that the insertion of Al3+ into TiO2-NTAs facilitates in the reduction of Ti4+ to Ti3+. Electrochemical investigation on the Al3+ insertion process reveals that presence of ions plays vital role for the effective insertion and de-insertion of Al3+ into/from the TiO2-NTA. (C) 2014 Elsevier Ltd. All rights reserved.
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