Efficient Metal‐Oriented Electrodeposition of a Co‐Based Metal‐Organic Framework with Superior Capacitive Performance

• Published in: ChemSusChem 2022-07, Vol.15 (14), p.e202200644-n/a
• Main Authors: Han, Yan, Cui, Jian, Yu, Yue, Chao, Yunfeng, Li, Dejun, Wang, Caiyun, Wallace, Gordon G.
• Format: Article
• Language: English
• Subjects: carbon fiber; Carbon fibers; Cathodic coating (process); Coated electrodes; cobalt; Electrodeposition; Energy storage; Metal surfaces; Metal-organic frameworks; Nucleation; Substrates; Supercapacitors
• ISSN: 1864-5631; 1864-564X
• DOI: 10.1002/cssc.202200644

An efficient cathodic electrodeposition method is developed for coating Co‐based metal‐organic frameworks (Co‐MOF) on carbon fiber cloth (CFC), a widely used substrate in energy fields. The use of a highly active Co metal surface enables nucleation and growth of Co‐MOF in 3D rodlike crystal bundles. When used as a binder‐free electrode (Co‐MOF/CFC) for supercapacitors, it shows a high areal capacitance of 1784 mF cm−2 at 1 mA cm−2, good cycling stability and excellent rate capability. The assembled asymmetric all‐solid‐state supercapacitor device (Co‐MOF/CFC//AC) delivers a high energy density and power density. This work may open up an effective approach to realize the electrosynthesis of MOF films, promoting use in energy storage and conversion fields. Co‐MOF it: An efficient metal‐oriented cathodic electrodeposition method is developed for coating Co‐MOF on carbon fiber cloth (CFC), which is realized by using a highly active Co metal surface modifier that enables nucleation and growth of Co‐MOF in 3D rodlike crystal bundles. As a binder‐free electrode for supercapacitors, Co‐MOF/CFC shows high areal capacitance, good cycling stability, and excellent rate capability.