期刊
ELECTROCHIMICA ACTA
卷 61, 期 -, 页码 19-24出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.11.042
关键词
Highly ordered titanium oxide nanotube; Anodization method; Amorphous and anatase structure; Nanostructured electrode; Cyclic voltammetry; Li-ion batteries
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [NRF-2010-0024752]
- Korea Ministry of Knowledge Economy
- Global Institute for Talented Education (GIFTED)
The electrochemical performance of smooth and highly ordered TiO2 nanotubes with an amorphous structure prepared by anodization was compared to crystalline anatase TiO2 nanotubes that were formed by post-treatment annealing. The amorphous TiO2 nanotube electrode shows enhanced electrochemical properties vs. the anatase electrode, which was evaluated in terms of discharge capacity, rate capability and cycling performance. The irreversible Li capacity observed in the amorphous TiO2 nanotube was primarily due to the formation of crystalline LixTiO2, which is an inactive phase. The higher rate capability of the amorphous TiO2 nanotube electrode compared to the anatase electrode can be attributed to better reversibility and higher Li diffusivity. (C) 2011 Elsevier Ltd. All rights reserved.
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