Step-by-step assembly preparation of core-shell Si-mesoporous TiO2 composite nanospheres with enhanced lithium-storage properties.

Core-shell structured Si-mesoporous TiO2 (Si@mTiO2) composite nanospheres are designed and prepared via a step-by-step assembly method. Si@mTiO2 exhibit excellent lithium-storage properties when used as anode materials in lithium ion batteries. The reversible specific capacity is maintained at as high as 700 mA h g-1 with no capacity decay even after 200 cycles at 1 A g-1.