LAUSR

Abstract TiO 2 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 TiO 2 /Fe 2 O 3 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 Fe 0 at the interface between TiO 2 and Fe 2 O 3 can facilitate the reversibility of reactions and further result in a high reversible capacity.