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Published on: November 11, 2013
Compositing amorphous TiO2 with N-doped carbon as high-rate anode materials for lithium-ion batteries
Ying Xiao1, Changwen Hu, Minhua Cao
1Key Laboratory of Cluster Science, Ministry of Education of China, Department of Chemistry, Beijing Institute of Technology, Beijing 100081 (P.R. China), Fax: (+86) 10-68918572.
Abstract:
Compositing amorphous TiO2 with nitrogen-doped carbon through Ti-N bonding to form an amorphous TiO2/N-doped carbon hybrid (denoted a-TiO2/C-N) has been achieved by a two-step hydrothermal-calcining method with hydrazine hydrate as an inhibitor and nitrogen source. The resultant a-TiO2/C-N hybrid has a surface area as high as 108 m(2) g(-1) and, when used as an anode material, exhibits a capacity as high as 290.0 mA h g(-1) at a current rate of 1 C and a reversible capacity over 156 mA h g(-1) at a current rate of 10 C after 100 cycles; these results are better than those found in most reports on crystalline TiO2 . This superior electrochemical performance could be ascribed to a combined effect of several factors, including the amorphous nature, porous structure, high surface area, and N-doped carbon.
