In this study, we report a higher electrochemical performances of Li₄Ti₅O₁₂ (LTO) anode material via solid method, then adding different contents of Fe₂O₃ into LTO (F_xLTO, 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_0.2LTO 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_0.2LTO, with higher surface area of 28.4937 m² 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_0.2LTO 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.

中文翻译：

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掺铁的Li 4 Ti 5 O 12储能器件负极材料的电化学性能增强

在这项研究中，我们通过固相方法报道了Li ₄ Ti ₅ O ₁₂（LTO）阳极材料的更高的电化学性能，然后在LTO中添加了不同含量的Fe ₂ O ₃（F _x LTO，x  = 0.1，0.2，0.3， 0.4）二次煅烧。研究表明，纯LTO在750°C时具有最高的电化学性能。另外，对于锂离子电池，F _0.2 LTO在20 mA g ^-1时表现出出色的251.9 mAh g ^-1放电容量；甚至在100 mA g ^-1下循环100次，容量为192.1 mAh g ^-1保留。特别是，Fe的比电容_0.2 LTO，与28.4937米的较高表面积² 克^-1的0.4187毫升克和孔体积^-1，达到65.17，46.56，26.71，19.32 F G ^-1，在50，100，500，混合电容器分别为1000 mA g ^-1。即使以50 mA g ^-1循环500次，仍保持20.18 F g ^-1的电容。显然，对于锂离子电池和混合电容器，Fe _0.2 LTO的电化学性能优于LTO。因此，掺铁的LTO具有增强的电化学性能，作为储能装置的负极材料。