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

Date
2013-07-01Author
Almeida, D. A. L.
Antunes, E. F. [UNIFESP]
Silva, V. Q. da
Baldan, M. R.
Ferreira, N. G.
Type
ArtigoISSN
1432-8488Is part of
Journal of Solid State ElectrochemistryDOI
10.1007/s10008-013-2052-0Metadata
Show full item recordAbstract
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.
Citation
Journal of Solid State Electrochemistry. New York: Springer, v. 17, n. 7, p. 1977-1984, 2013.Sponsorship
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Collections
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