Pseudo-capacitance on exfoliated carbon fiber in sulfuric acid electrolyte |
| |
| Authors: | Y Soneda J Yamashita M Kodama H Hatori M Toyoda M Inagaki |
| |
| Institution: | (1) National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8569, Japan;(2) Dept. App. Chem., Oita University, Dannoharu 700, Oita 870-1192, Japan;(3) Aichi Institute of Technology, Yakusa, Toyota 470-0392, Japan |
| |
| 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.
PACS 81.05.Uw; 82.45.Fk; 82.47.Uv |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
