Enhanced electrochemical performance of Fe-doping Li 4 Ti 5 O 12 anode material for energy storage device

In this study, we report a higher electrochemical performances of Li 4 Ti 5 O 12 (LTO) anode material via solid method, then adding different contents of Fe 2 O 3 into LTO (F x LTO, x = 0.1, 0.2, 0.3, 0.4) secondary calcined. The study shows that pure LTO holds the highest electrochemical performances at 750 °C. Additionally, F 0.2 LTO demonstrates an outstanding discharge capacity of 251.9 mAh g −1 at 20 mA g −1 for lithium ion batteries; even cycled at 100 mA g −1 for 100 times, a capacity of 192.1 mAh g −1 retains. Particularly, the specific capacitance of Fe 0.2 LTO, with higher surface area of 28.4937 m 2 g −1 and pore volume of 0.4187 ml g −1 , reaches 65.17, 46.56, 26.71, 19.32 F g −1 at 50, 100, 500, 1000 mA g −1 for hybrid capacitors, respectively. Even cycled at 50 mA g −1 for 500 times, a capacitance of 20.18 F g −1 retains. Obviously, Fe 0.2 LTO demonstrates the remarkable electrochemical performances than LTO for lithium ion batteries and hybrid capacitors. Therefore, Fe-doping LTO has enhanced electrochemical performance as anode material for energy storage device.