NiCoLDH nanosheets grown on MOF-derived Co3O4 triangle nanosheet arrays for high-performance supercapacitor

被引:86
作者
Yin, Xuemin [1 ]
Li, Hejun [1 ]
Yuan, Ruimei [1 ]
Lu, Jinhua [1 ]
机构
[1] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 62卷
关键词
NiCoLDH; Co3O4; Core-shell; Supercapacitor; MOF; CARBON CLOTH; NANOWIRE ARRAYS; NICKEL FOAM; NICO2O4; CONSTRUCTION; ELECTRODES; ION; TRANSFORMATION; NANOSPHERES; COMPOSITE;
D O I
10.1016/j.jmst.2020.05.066
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Hierarchical Co3O4@NiCoLDH nanosheets (NSs) were prepared on carbon cloth through a multistep method, containing Metal-organic frameworks (MOF)-templated thermal annealing and electrodeposition. The triangle-shaped Co3O4Nss were firstly obtained by thermal treatment of MOF templates in air. Then, ultrathin NiCoLDHNss were in-situ electrodeposited on the surface of Co3O4Nss, constructing a core-shell structure. Benefiting the unique hierarchical structure, high conductivity of Co3O4Nss core and large surface area of NiCoLDHNss shell, the Co3O4@NiCoLDHNss array served as supercapacitor electrode exhibits excellent electrochemical properties, such as high specific capacitance of 1708 F g(-1) (850 C g(-1)) at a current density of 1 A g(-1), good rate capability, and excellent cycling stability. Further, the asymmetric supercapacitor assembled by Co3O4@NiCoLDHNss and activated carbon, also displays superior electrochemical performance with high energy density and power density. Remarkably, the strategy of constructing core-shell structure based on MOF templates could be extended to other electrochemical fields. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码:60 / 69
页数:10
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