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

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The unique crystal structure and multiple redox couples of iron titanate(Fe2TiO5)provide it a high theo-retical 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.
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