Fe <sub>2</sub> TiO <sub>5</sub> nanochains as anode for high‐performance lithium‐ion capacitor
Rong Kang, Wangqin Zhu, Sheng Li, Bobo Zou, Liaoliao Wang, Guochun Li, Xianhu Liu, Dickon H. L. Ng, Jingxia Qiu, Yan Zhao, Fen Qiao, Jiabiao Lian
Abstract
Abstract The unique crystal structure and multiple redox couples of iron titanate (Fe 2 TiO 5 ) 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) Fe 2 TiO 5 nanochains. The as‐prepared Fe 2 TiO 5 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 Fe 2 TiO 5 /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 Fe 2 TiO 5 nanochains are promising anode materials for high‐performance LICs.