超级电容器
材料科学
碳纳米纤维
循环伏安法
电极
氧化还原
电化学
纳米纤维
储能
化学工程
纳米技术
碳纤维
金属有机骨架
碳纳米管
复合材料
化学
有机化学
冶金
复合数
工程类
物理化学
吸附
功率(物理)
物理
量子力学
作者
Zahir Abbas,Nissar Hussain,Satendra Kumar,Shaikh M. Mobin
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:16 (2): 868-878
摘要
The rational construction of free-standing and flexible electrodes for application in electrochemical energy storage devices and next-generation supercapacitors is an emerging research focus. Herein, we prepared a redox-active ferrocene dicarboxylic acid (Fc)-based nickel metal-organic framework (MOF) on electrospun carbon nanofibers (NiFc-MOF@CNFs) via an in situ approach. This in situ approach avoided the aggregation of the MOF. The NiFc-MOF@CNF flexible electrode showed a high redox-active behavior owing to the presence of ferrocene and flexible carbon nanofibers, which led to unique properties, including high flexibility and lightweight. Furthermore, the prepared electrode was utilized in a supercapacitors (SC) without the use of any binder, which achieved a specific capacity of 460 C g-1 at 1 A g-1 with an excellent cyclic retention of 82.2% after 25 000 cycles and a good rate capability. A flexible asymmetric supercapacitor device was assembled, which delivered a high energy density of 56.25 W h kg-1 and a long-lasting cycling performance. Also, the prepared electrode could be used as a freestanding electrode in flexible devices at different bending angles. The obtained cyclic voltammetry curves showed negligible changes, indicating the high stability and good flexibility of the electrode. Thus, the use of the in situ strategy can lead to the uniform growth of redox-active MOFs or other porous materials on CNFs.
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