Facile fabrication of robust TiO2@SnO2@C hollow nanobelts for outstanding lithium storage

Elaborate fabrication of state-of-the-art nanostructure SnO 2 @C-based composites greatly contributes to alleviate the huge volume expansion issue of the SnO 2 anodes. But the preparation processes of most of them are complicated and tedious, which is generally adverse to the development of SnO 2 @C-based composite anodes. Herein, a unique nanostructure of TiO 2 @SnO 2 @C hollow nanobelts (TiO 2 @SnO 2 @C HNBs), including the characteristics of one-dimensional architecture, sandwich protection, hollow structure, carbon coating, and a mechanically robust TiO 2 support, has been fabricated by a facile approach for the first time. As anodes for lithium-ion batteries, the as-fabricated TiO 2 @SnO 2 @C HNBs exhibit an outstanding lithium storage performance, delivering capacity of 804.6 and 384. 5 mAh g −1 at 200 and even 1000 mA g −1 after 500 cycles, respectively. It is demonstrated that thus outstanding performance is mainly attributed to the unique nanostructure of TiO 2 @SnO 2 @C HNBs.