Compositing Amorphous TiO₂ with N‐Doped Carbon as High‐Rate Anode Materials for Lithium‐Ion Batteries

Abstract

Abstract Compositing amorphous TiO 2 with nitrogen‐doped carbon through TiN bonding to form an amorphous TiO 2 /N‐doped carbon hybrid (denoted a ‐TiO 2 /CN) has been achieved by a two‐step hydrothermal–calcining method with hydrazine hydrate as an inhibitor and nitrogen source. The resultant a ‐TiO 2 /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 TiO 2 . 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.