| 초록 |
In this study, the electrochemical properties of activated carbon fibers (ACFs) have been investigated by different heating treatment temperature of the pitch-based ACFs in order to improve the specific capacitance of electric double-layer capacitor (EDLC). The samples were prepared at 1050 and 1450 oC heating treatment, after activation with 4 M KOH at 800 oC using As-spun pitch fiber. The specific surface area of ACFs increased from 828 m2/g to 987 m2/g, and the micro-, meso-pore volume of ACFs were also increased. The pore size of ACFs was increased during heating treatment process. These results were due to desorbing oxygen and hydrogen elements within the ACFs. The specific capacitance of EDLC prepared from the ACFs with heating treatment in 1450 oC was increased 163% compared to ACFs with heating treatment in 800 oC . |
