Hybrid MnO2@NiCo2O4 nanosheets for high performance asymmetric supercapacitors

NiCo2O4 is a promising material for supercapacitors because of its high theoretical capacity. However, this material often suffers from low cycling stability. In this work, hybrid MnO2@NiCo2O4 nanosheets grown on Ni foam have been synthesized through a facile hydrothermal approach. The MnO2@NiCo2O4...

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Bibliographic Details
Published in:Inorganic chemistry frontiers 2018-06, Vol.5 (6), p.1378-1385
Main Authors: Zhao, Depeng, Wu, Xiang, Guo, Chuanfei
Format: Article
Language:English
Subjects:
Capacitance
Electrochemical analysis
Electrode materials
Electrodes
Flux density
Hybrid structures
Inorganic chemistry
Lithium
Manganese dioxide
Metal foams
Nanosheets
Nickel compounds
Supercapacitors
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Summary:NiCo2O4 is a promising material for supercapacitors because of its high theoretical capacity. However, this material often suffers from low cycling stability. In this work, hybrid MnO2@NiCo2O4 nanosheets grown on Ni foam have been synthesized through a facile hydrothermal approach. The MnO2@NiCo2O4 electrode delivers a high specific capacitance of 3086 mF cm−2 at a current density of 2 mA cm−2, and the as-assembled asymmetric supercapacitors yield a high energy density of 72.1 W h kg−1 and an excellent cycle life with a 97.3% capacitance retention after 6000 cycles. The outstanding electrochemical performance could be attributed to the unique hybrid structures of the electrode materials. This shows that the MnO2@NiCo2O4 hybrid structures as the electrode materials might be potentially useful for next generation high performance supercapacitors.
ISSN:2052-1545
2052-1553
DOI:10.1039/c8qi00170g