Improved cycle capability of Titanium-doped Fe2O3 anode material for Li-ion batteries

Ti 0.9 Fe 1.1 O 3 with a solid solution structure has been synthesized and investigated as an anode material for rechargeable Li-ion batteries. Ti 0.9 Fe 1.1 O 3 was prepared by a solid-state reaction of Fe, Fe 2 O 3 and TiO 2 . Without other modification, the obtained Ti 0.9 Fe 1.1 O 3 exhibited high discharge capacity and remarkable cycle capability compared with the commercial Fe 2 O 3 sample. A reversible capacity of 454.9 mA h g −1 and coulombic efficiency of 100% at 100 mA g −1 could be achieved and kept even after 500 cycles. The prominent electrode performance could be attributed to the stable solid solution structure, in which Titanium is inactive and only support the unstable structure during reversible electrochemical processes .