Hybrid Composite Ni(OH)2@NiCo2O4 Grown on Carbon Fiber Paper for High-Performance Supercapacitors

We have successfully fabricated and tested the electrochemical performance of supercapacitor electrodes consisting of Ni(OH)2 nanosheets coated on NiCo2O4 nanosheets grown on carbon fiber paper (CFP) current collectors. When the NiCo2O4 nanosheets are replaced by Co3O4 nanosheets, however, the energ...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2013-11, Vol.5 (21), p.11159-11162
Main Authors: Huang, Liang, Chen, Dongchang, Ding, Yong, Wang, Zhong Lin, Zeng, Zhengzhi, Liu, Meilin
Format: Article
Language:English
Subjects:
Carbon - chemistry
Carbon Fiber
Cobalt - chemistry
Electric Capacitance
Electrochemical Techniques
Electrodes
Hydroxides - chemistry
Nanostructures - chemistry
Nickel - chemistry
Oxygen - chemistry
Surface Properties
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Summary:We have successfully fabricated and tested the electrochemical performance of supercapacitor electrodes consisting of Ni(OH)2 nanosheets coated on NiCo2O4 nanosheets grown on carbon fiber paper (CFP) current collectors. When the NiCo2O4 nanosheets are replaced by Co3O4 nanosheets, however, the energy and power density as well as the rate capability of the electrodes are significantly reduced, most likely due to the lower conductivity of Co3O4 than that of NiCo2O4. The 3D hybrid composite Ni(OH)2/NiCo2O4/CFP electrodes demonstrate a high areal capacitance of 5.2 F/cm2 at a cycling current density of 2 mA/cm2, with a capacitance retention of 79% as the cycling current density was increased from 2 to 50 mA/cm2. The remarkable performance of these hybrid composite electrodes implies that supercapacitors based on them have potential for many practical applications.
ISSN:1944-8244
1944-8252
DOI:10.1021/am403367u