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.
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This work was supported by Zijin Program of Zhejiang University, China, the Fundamental Research Funds for the Central Universities (No. 2010QNA4003), the PhD Programs Foundation of Ministry of Education of China (No. 20100101120024), the Foundation of Education Office of Zhejiang Province (No. Y201016484), the Qianjiang Talents Project of Science Technology Department of Zhejiang Province (2011R10021), and the National Natural Science Foundation of China (No. 51101139).
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Wang, YX., Xie, J., Cao, GS. et al. Electrochemical performance of TiO2/carbon nanotubes nanocomposite prepared by an in situ route for Li-ion batteries. Journal of Materials Research 27, 417–423 (2012). https://doi.org/10.1557/jmr.2011.406