Growth of vertically aligned carbon nanotubes on carbon fiber: thermal and electrochemical treatments

Growth of vertically aligned carbon nanotubes on carbon fiber: thermal and electrochemical treatments

Author Almeida, D. A. L. Google Scholar
Antunes, E. F. Autor UNIFESP Google Scholar
Silva, V. Q. da Google Scholar
Baldan, M. R. Google Scholar
Ferreira, N. G. Google Scholar
Institution INPE
Universidade Federal de São Paulo (UNIFESP)
Abstract Composite electrodes of vertically aligned carbon nanotubes (VACNT) were synthesized on carbon fiber (CF) substrate by pyrolysis of camphor/ferrocene using a SiO2 interlayer as a barrier against metal diffusion into the substrate. Two treatments were used to remove iron from CF/VACNT structure: thermal annealing at high temperature under inert atmosphere and electrochemical oxidation in H2SO4 solution. the composites were characterized by scanning electron microscopy and Raman scattering spectroscopy. Besides, the electrochemical behavior of CF/VACNT was analyzed by cyclic voltammetry and charge/discharge tests. CF/VACNT composite submitted to the electrochemical oxidation showed the best electrochemical performance, with high specific capacitance, which makes it very attractive as electrode for supercapacitors.
Keywords Carbon fiber
Carbon nanotube
Composite
Supercapacitors
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 2009/17584-0
Date 2013-07-01
Published in Journal of Solid State Electrochemistry. New York: Springer, v. 17, n. 7, p. 1977-1984, 2013.
ISSN 1432-8488 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 1977-1984
Origin http://dx.doi.org/10.1007/s10008-013-2052-0
Access rights Closed access
Type Article
Web of Science ID WOS:000320888800022
URI http://repositorio.unifesp.br/handle/11600/36472

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