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Electrochemical behavior of exfoliated carbon fibers in H2SO4 electrolyte with different concentrations
- Source :
-
Journal of Physics & Chemistry of Solids . Feb2004, Vol. 65 Issue 2/3, p219. 4p. - Publication Year :
- 2004
-
Abstract
- Exfoliated carbon fibers (ExCFs) were prepared by the decomposition of intercalation compounds with nitric acid derived from pitch-based carbon fibers and used as electrodes of electrochemical capacitors in sulfuric acid electrolyte. The specific capacitance, which was estimated by cyclic voltammetry and galvanostatic charge-discharge (CD) measurements, increased gradually with the concentration of the electrolyte up to10 mol/dm3 and then rapidly to huge value in higher concentration of electrolyte. The capacitance obtained for a sample with the largest specific surface area (ca. 300 m2/g) was 450 F/g, which was calculated from the 50th discharge curve of CD experiment. The results suggest the possibility of pseudo-capacitance by the intercalation of sulfuric acid molecules into graphite gallery of ExCFs electrode. [Copyright &y& Elsevier]
- Subjects :
- *CHEMICAL peel
*ELECTROCHEMICAL analysis
*CARBON
*ELECTRODES
Subjects
Details
- Language :
- English
- ISSN :
- 00223697
- Volume :
- 65
- Issue :
- 2/3
- Database :
- Academic Search Index
- Journal :
- Journal of Physics & Chemistry of Solids
- Publication Type :
- Academic Journal
- Accession number :
- 12039568
- Full Text :
- https://doi.org/10.1016/j.jpcs.2003.10.017