Porous TiO^sub 2^/Fe^sub 2^O^sub 3^ nanoplate composites prepared by de-alloying method for Li-ion batteries

TiO2 anode presents a stable cycling performance but relatively low theoretical capacity, which has hindered its applications in high-performance Li-ion batteries (LIBs). For improving the Li storage properties, novel TiO2/Fe2O3 composite with a porous "slice on slice" structure was prepared via a facile de-alloying method. The composite delivers a reversible capacity of 838.8 mAh g-1 after 400 cycles at a current density of 200 mA g-1 and maintaining a discharge capacity of 339 mAh g-1 even at 2 A g-1. The improved Li storage property could be ascribed to the synergistic effects of the two active materials. Especially, the reduction products of Fe0 at the interface between TiO2 and Fe2O3 can facilitate the reversibility of reactions and further result in a high reversible capacity.