Metal-Organic Framework Templated 3D Hierarchical ZnCo2 O4 @Ni(OH)2 Core-Shell Nanosheet Arrays for High-Performance Supercapacitors

Chemistry : a European Journal
Xue HanLei Han

Abstract

Designing core-shell electrode materials with desired components and architectures is a promising strategy for boosting electrochemical performance. Here, three-dimensional hierarchical ZnCo2 O4 @Ni(OH)2 core-shell nanosheet arrays have been successfully fabricated on a Ni foam substrate, in which the porous ZnCo2 O4 nanosheet "core" as the conductive scaffold was synthesized by a metal-organic framework (MOF)-templated method, and the ultrathin Ni(OH)2 nanoflakes "shell" with rich active sites were grafted on the ZnCo2 O4 nanosheet through a hydrothermal treatment. When directly used as a free-standing electrode for supercapacitor, these hierarchical ZnCo2 O4 @Ni(OH)2 core-shell nanosheet arrays exhibited a high capacitance of 3063.2 mF cm-2 (1021.1 F g-1 ) at the current density of 1 mA cm-2 . This electrode significantly outperformed individual Ni(OH)2 or ZnCo2 O4 nanosheet arrays, benefiting from the robust core-shell arrays on Ni foam with good electrical conductivity and abundant active sites, as well as the synergetic effect between MOF-derived porous ZnCo2 O4 "core" and the ultrathin Ni(OH)2 "shell". Moreover, the assembled ZnCo2 O4 @Ni(OH)2 //activated-carbon asymmetric supercapacitor displayed excellent energy and pow...Continue Reading

References

Sep 11, 2013·Chemical Communications : Chem Comm·Rizhi ChenHuanting Wang
Nov 1, 2017·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Cao GuanJohn Wang
Mar 1, 2017·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Cao GuanJohn Wang

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Citations

Sep 11, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Kai TaoLei Han
Nov 19, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuan YangXiuhua Wang
Aug 13, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Weiwei LiKai Tao
Oct 14, 2021·ChemSusChem·Shivraj M MahadikSarita Patil

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