Graphene/Multi-Walled Carbon Nanotubes Hybrid Materials for Supercapacitors 


Vol. 21,  No. 1, pp. 62-67, Mar.  2015


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  Abstract

We have developed a versatile method for the preparation of chemically linked graphene/multi-walled carbon nanotubes (MWNTs) hybrid materials via simple acid-catalyzed dehydration reaction between graphene oxide (GO) and aminefunctionalized MWNTs (af-MWNTs). In this condition, ketone (-C=O) groups in GO and primary amine (-NH2) moieties in af-MWNTs readily react to form imine (-C=N-) linkage. The chemical structures of graphene/MWNTs hybrid materials have been investigated using various microscopic and spectroscopic measurements. As a result of the synergetic effects of hybrid materials such as improved surface area and the superior structural restoration of graphitic networks, the hybrid materials demonstrate improved capacitance with excellent long-term stability. Furthermore, controlled experiments were conducted to optimize the weight ratio of graphene/MWNTs in hybrid materials. The highest capacitance of 132.4 F/g was obtained from the GM7.5 material, in which the weight ratio between graphene and MWNTs was adjusted to 7.5/1, in 1M KOH electrolyte at a scan rate of 100 mV/s.

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  Cite this article

[IEEE Style]

L. BR and C. DW, "Graphene/Multi-Walled Carbon Nanotubes Hybrid Materials for Supercapacitors," Clean Technology, vol. 21, no. 1, pp. 62-67, 2015. DOI: .

[ACM Style]

Lee BR and Chang DW. 2015. Graphene/Multi-Walled Carbon Nanotubes Hybrid Materials for Supercapacitors. Clean Technology, 21, 1, (2015), 62-67. DOI: .

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

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