Influence of carbon shell structure on electrochemical performance of multi-walled carbon nanotube electrodes

Title
Influence of carbon shell structure on electrochemical performance of multi-walled carbon nanotube electrodes
Authors
박수진
Keywords
Multi walled-carbon nanotubes Polyaniline Core/shell Electrochemical performance
Issue Date
2013
Publisher
ANALYTICA CHIMICA ACTA
Series/Report no.
ANALYTICA CHIMICA ACTA ; Vol788 Startpage 17 Endpage 23
Abstract
Core/shell nanostructures have received considerable attention due to the synergistic effect of their combination of materials. In this work, core/shell carbon/multi walled carbon nanotubes (MWNTs) (CMWNTs) composed of core MWNTs and carbon shells were prepared to obtain a new type of carbon electrode materials. Carbon shells containing nitrogen groups were prepared by coating polyaniline (PANI) onto the MWNTs by in situ polymerization and subsequent carbonization at 850 ?C. After carbonization, the C-MWNTs contained 5.84% nitrogen and showed a hollow structure and crystallinity like that of pristine MWNTs. In addition, the C-MWNTs exhibited electrochemical performance superior to that of pristine MWNTs, and the highest specific capacitance (231 F g?1) of the C-MWNTs was obtained at a scan rate of 0.1Ag?1, as compared to 152 F g?1 for pristine MWNTs. This superior performance is attributed to the maintenance of high electrical conductivity by the ? interaction between the carbon layer and the MWNTs, increased specific surface area of C-MWNTs, and the presence of nitrogen groups formed on the carbon electrode after the carbonization of the shell PANI.
URI
http://dx.doi.org/10.1016/j.aca.2013.05.047
http://dspace.inha.ac.kr/handle/10505/33159
ISSN
0003-2670
Appears in Collections:
College of Natural Science(자연과학대학) > Chemistry (화학) > Journal Papers, Reports(화학 논문, 보고서)
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