Key Laboratory of Photochemical Biomaterials, and Energy Storage Materials, College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, 150025, P.R. China.
Chemistry. 2018 Jul 25;24(42):10683-10688. doi: 10.1002/chem.201800461. Epub 2018 Jun 26.
Flexible, highly porous Fe O and V O nanofibers (NFs) have been synthesized by a facile electrospinning method followed by calcination. They have been directly used as binder-free electrodes for high-performance supercapacitors. These Fe O and V O NFs interconnect with one another and construct three-dimensional hierarchical porous films with high specific surface areas. Benefitting from their unique structural features, binder-free Fe O and V O porous nanofiber electrodes offer high specific capacitances of 255 F g and 256 F g , respectively, at 2 mV s in 1 m aqueous Na SO as electrolyte. An all-solid-state asymmetric supercapacitor (ASC) has been fabricated using Fe O and V O nanofibers as negative and positive electrodes, respectively. It could be operated at up to 1.8 V, taking advantage of the wide and opposite potential windows of the respective electrodes. The assembled all-solid-state ASC achieved a high energy density up to 32.2 W h kg at an average power density of 128.7 W kg , and exhibited excellent cycling stability and power capability. The effective and facile synthesis method and superior electrochemical performance described herein make electrospun Fe O and V O NFs promising electrode materials for high-performance ASCs.
通过简便的静电纺丝方法随后进行煅烧，合成了灵活、高多孔的 FeO 和 V2O5 纳米纤维 (NFs)。它们被直接用作高性能超级电容器的无粘结剂电极。这些 FeO 和 V2O5 NFs 相互连接，并构建具有高比表面积的三维分级多孔薄膜。得益于其独特的结构特征，无粘结剂的 FeO 和 V2O5 多孔纳米纤维电极在 1 m 水溶液 Na2SO4 电解质中以 2 mV s 的速度分别提供 255 F g 和 256 F g 的高比电容。使用 FeO 和 V2O5 纳米纤维分别作为负极和正极，制造了全固态不对称超级电容器 (ASC)。它可以在高达 1.8 V 的电压下工作，利用各自电极的宽且相反的电位窗口。组装的全固态 ASC 在平均功率密度为 128.7 W kg 时，能量密度高达 32.2 Wh kg，表现出优异的循环稳定性和功率性能。本文所述的有效且简便的合成方法和优异的电化学性能使电纺 FeO 和 V2O5 NFs 成为高性能 ASC 的有前途的电极材料。
