title: Compositing amorphous TiO2 with N-doped carbon as high-rate anode materials for lithium-ion batteries.
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.
authors.affiliation: Key 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.
authors.forename: Ying
authors.initials: Y
authors.lastname: Xiao
authors.forename: Changwen
authors.initials: C
authors.lastname: Hu
authors.forename: Minhua
authors.initials: M
authors.lastname: Cao
keywords: amorphous materials; doping; electrochemistry; lithium; titanium