Porous TiO2 nanobelts coated with mixed transition-metal oxides Sn3O4 nanosheets core-shell composites as high-performance anode materials of lithium ion batteries.

A novel type of porous TiO 2 nanobelts anchored with Sn 3 O 4 nanosheets (TiO 2 nanobelts @Sn 3 O 4 nanosheets) core-shell composites were developed via two-step hydrothermal methods. The structure, morphology, formation mechanism and electrochemical performance of the porous TiO 2 nanobelts coated with mixed transition-metal oxides Sn 3 O 4 nanosheets core-shell composites were researched. The results illustrated that the Sn 3 O 4 nanosheets were uniformly anchored on the surface of the porous TiO 2 nanobelts, which were almost perpendicular to the porous TiO 2 nanobelts. The composites as anode materials exhibited more remarkable electrochemical performances than the Sn 3 O 4 nanosheet and the porous TiO 2 nanobelts, in terms of the cycling performance and rate capability. The initial discharge capacity was 1513.7 mAh/g and the reversible capacity was 659 mAh/g after 50 cycles. This study perhaps inspired the designing of other transition metal oxide-based anode materials with desirable electrochemical performance for applications of lithium ion batteries. [ABSTRACT FROM AUTHOR]