Journal
MATERIALS RESEARCH EXPRESS
Volume 6, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/ab513c
Keywords
graphene; carbon nanotube arrays; nickel oxide; thermal decomposition; supercapacitor
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Funding
- National Natural Science Foundation of China [51741104]
- Hongliu first disciplines Development Program of Lanzhou University of Technology
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In this paper, the graphene/CNTs arrays were successively grown on Cu substrate by chemical vapor deposition method. The graphene/CNTs arrays were decorated with NiO nanoparticles by adsorption and thermal decomposition of Ni(acac)(2)4H(2)O. After decorating NiO nanoparticles, the graphene/CNTs-NiO possesses a more dispersing morphology and a better electrical conductivity, owing to improving the degree of graphitization of carbon nanostructure, which could provide the effective transport channels for electrolyte ions and electrons in electrochemical process. The graphene/CNTs-NiO used as a binder-free electrode exhibits a high specific capacitance of 323 F g(?1) in 1.0 M Na2SO4 aqueous solution at current density of 1 A g(?1), which is 7.6 times higher than that of graphene/CNTs electrode.
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