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Electrochemical performance of TiO2/carbon nanotubes nanocomposite prepared by an in situ route for Li-ion batteries

Published online by Cambridge University Press:  13 December 2011

Yu-Xiang Wang ,
Jian Xie ,
Gao-Shao Cao ,
Tie-Jun Zhu  and
Xin-Bing Zhao
Yu-Xiang Wang
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Jian Xie
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Gao-Shao Cao
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Tie-Jun Zhu
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Xin-Bing Zhao*
Affiliation:
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
*
a)Address all correspondence to this author. e-mail: zhaoxb@zju.edu.cn
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Abstract

A TiO2/carbon nanotubes (TiO2/CNTs) composite was synthesized by chemical vapor deposition method with in situ growth of CNTs using hydrothermally treated TiO2 as the starting material. The nanocomposite was characterized by powder x-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, Raman spectrum, and nitrogen adsorption/desorption isotherms and was investigated as an anode material for lithium-ion batteries. The underlying mechanism for the improvement was analyzed by cyclic voltammetry and electrochemical impedance spectroscopy. The in situ synthesized composite showed better electrochemical performance than the pristine TiO2. The in situ formed CNTs not only supply an efficient conductive network but also keep the structural stability of the TiO2 particles, leading to improved electrochemical performance.

Keywords

Chemical vapor depositionCompositeMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 2 , 28 January 2012 , pp. 417 - 423
Copyright
Copyright © Materials Research Society 2011

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