For the disadvantages of both the slow reaction kinetics and the poor conductivity for Nb₂O₅ electrode materials as sodium-ion capacitors (SICs), Nb₂O₅ NRs/NMMCNF film electrode with good flexibility and high electrochemical property has been fabricated by electrospinning PAN/PMMA/H₂Nb₂O₆·H₂O homogeneous viscous suspension and followed by an annealing treatment, in which the precursor H₂Nb₂O₆·H₂O nanorods are obtained by grinding H₂Nb₂O₆·H₂O nanowires, and Nb₂O₅ nanorods are uniformly embedded in nitrogen doped microporous multichannel carbon nanofiber. Benefiting from the multichannel network structure, Nb₂O₅ NRs/NMMCNF film electrode delivers the fast kinetics of Na⁺-storage and the superior Na-ion storage performance, it delivers outstanding rate capability (101 mAh g⁻¹ at 4 A g⁻¹) and ultralong lifespan (91% capacity retention after 10,000 cycles at 2 A g⁻¹). A Nb₂O₅ NRs/NMMCNF//AC SIC based on the Nb₂O₅ NRs@NMMCNF fiber film anode and the AC cathode is assembled. The energy density of the as-assembled device is as high as 91 Wh kg⁻¹ and its maximum power density is 7499 W kg⁻¹. This work offers a new structure design strategy toward intercalation-type metal oxide electrodes for application in SICs.

由于Nb ₂ O ₅电极材料作为钠离子电容器（SIC）的反应动力学较慢且电导率较差的缺点，通过电纺丝制备了具有良好柔性和高电化学性能的Nb ₂ O ₅ NRs / NMMCNF薄膜电极。 PAN / PMMA / H ₂ Nb ₂ O ₆ ·H ₂ O均匀粘性悬浮液，然后进行退火处理，其中通过研磨H ₂ Nb ₂ O ₆ ·得到前驱体H ₂ Nb ₂ O ₆ ·H ₂ O纳米棒。高₂O纳米线和Nb ₂ O ₅纳米棒均匀地嵌入氮掺杂的微孔多通道碳纳米纤维中。从多声道网络结构中受益，NB ₂ ö _5个卢比/ NMMCNF薄膜电极提供的Na的快速动力学⁺吸留和优越的Na离子的存储性能，它提供了出色的速率能力（101毫安克^-1在4 A G ^{- 1}）和超长寿命（在2 A g ^-1下10,000次循环后，容量保持率达到91％）。甲的Nb ₂ ö ₅卢比/ NMMCNF //基于Nb的AC SIC ₂ ö ₅组装NRs @ NMMCNF纤维膜阳极和AC阴极。组装后的设备的能量密度高达91 Wh kg ^-1，最大功率密度为7499 W kg ^-1。这项工作为插层式金属氧化物电极在SIC中的应用提供了一种新的结构设计策略。