Abstract
The specific capacitance of exfoliated carbon fibers (ExCF) which were synthesized from pitch-based carbon fibers showed a strong dependence with the concentration of sulfuric acid electrolyte and reached 1.4 F/m2 in 18 M H2SO4 solution. Since the capacitance value is quite large compared with the case of conventional activated carbons, faradic reactions (charge transfer reactions) are the cause of pseudo-capacitance. ExCF, however, gave a featureless cyclic voltammogram in 18 M H2SO4 solution. In the case of exfoliated natural graphite, the intercalation of H2SO4 molecules is evidenced by redox peaks observed in the voltammograms in the same conditions. Therefore, a strong interaction between the H2SO4 molecules and the ExCF surface might be the reason for the origin of pseudo-capacitance with ExCF in H2SO4 electrolyte.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Endo M, Maeda T, Takeda T, Kim YJ, Koshiba K, Hara H, Dresselhaus MS (2001) J. Electrochem. Soc. 148:A910
Shiraishi S, Kurihara H, Tsubota H, Oya A, Soneda Y, Yamada Y (2001) Electrochem. Solid-State Lett. 4:A5
Frackowiak E, Jurewicz K, Delpeux S, Béguin F (2001) J. Power Sources 97–98:822
Conway BE (1999) Electrochemical Supercapacitors. Kluwer Academic, New York
Toyoda M, Shimizu A, Iwata H, Inagaki M (2001) Carbon 39:1697
Toyoda M, Katoh H, Inagaki M (2001) Carbon 39:2231
Toyoda M, Sedlacik J, Inagaki M (2002) Synth. Met. 130:39
Toyoda M, Tani Y, Soneda Y (2004) Carbon 42:2833
Kinoshita K (1987) Carbon, Electrochemical and Physicochemical properties. Wiley, New York
Soneda Y, Toyoda M, Hashiya K, Yamashita J, Kodama M, Hatori H, Inagaki M (2003) Carbon 41:2680
Inagaki M (2000) New Carbons, Control of Structure and Functions. Elsevier Sci. Ltd., Oxford
Shioyama H, Fujii R (1987) Carbon 25:771
Besenhard JO, Fritz HP (1983) Angew. Chem. Int. Edit. 22:950
Shi H (1996) Electrochim. Acta 41:1633
Qu D, Shi H (1998) J. Power Sources 74:99
Author information
Authors and Affiliations
Corresponding author
Additional information
PACS
81.05.Uw; 82.45.Fk; 82.47.Uv
Rights and permissions
About this article
Cite this article
Soneda, Y., Yamashita, J., Kodama, M. et al. Pseudo-capacitance on exfoliated carbon fiber in sulfuric acid electrolyte. Appl. Phys. A 82, 575–578 (2006). https://doi.org/10.1007/s00339-005-3395-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00339-005-3395-x