Fe2TiO5 nanochains as anode for high-performance lithium-ion capacitor.

The unique crystal structure and multiple redox couples of iron titanate (Fe₂TiO₅) provide it a high theoretical capacity and good cycling stability when used as an electrode. In this study, the electrospinning method is employed to synthesize one-dimensional (1D) Fe₂TiO₅ nanochains. The as-prepared Fe₂TiO₅ nanochains exhibited superior specific capacity (500 mAh·g⁻¹ at 0.10 A·g⁻¹), excellent rate performance (180 mAh·g⁻¹ at 5.00 A·g⁻¹), and good cycling stability (retaining 100% of the initial specific capacity at a current density of 1.00 A·g⁻¹ after 1000 cycles). The as-assembled Fe₂TiO₅/SCCB lithium-ion capacitor (LIC) also delivered a competitive energy density (137.8 Wh·kg⁻¹) and power density (11,250 W·kg⁻¹). This study proves that the as-fabricated 1D Fe₂TiO₅ nanochains are promising anode materials for high-performance LICs. [ABSTRACT FROM AUTHOR]