Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5013289 | Energy Conversion and Management | 2016 | 6 Pages |
Abstract
In the present study, electrode materials for electrochemical capacitors were developed using pitch-based activated carbon fibers with steam activation. The surface and structural characteristics of activated carbon fibers were observed using scanning electron microscopy and X-ray diffraction, respectively. Pore characteristics were investigated using N2/77Â K adsorption isotherms. The activated carbon fibers were applied as electrodes for electrical double-layer capacitors and analyzed in relation to the activation time. The specific surface area and total pore volume of the activated carbon fibers were determined to be 1520-3230Â m2/g and 0.61-1.87Â cm3/g, respectively. In addition, when the electrochemical characteristics were analyzed, the specific capacitance was confirmed to have increased from 1.1Â F/g to 22.5Â F/g. From these results, it is clear that the pore characteristics of pitch-based activated carbon fibers changed considerably in relation to steam activation and charge/discharge cycle; therefore, it was possible to improve the electrochemical characteristics of the activated carbon fibers.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Hye-Min Lee, Lee-Ku Kwac, Kay-Hyeok An, Soo-Jin Park, Byung-Joo Kim,