Jung, Hwan Jung Kim, Yong-Jung Han, Jong Hun Yudasaka, Masako Iijima, Sumio Kanoh, Hirofumi Kim, Yoong Ahm Kaneko, Katsumi Yang, Cheol-Min 2024-01-20T11:01:09Z 2024-01-20T11:01:09Z 2021-09-05 2013-12-12 1932-7447 https://pubs.kist.re.kr/handle/201004/127336 We investigated the importance of the specific effective surface area through a detailed study on the relationship between electrical conductivity of single-walled carbon nanohorns (SWCNHs) and accessibility of the electrolyte ions in the SWCNH-based supercapacitor. After heat treatment of the SWCNHs, the ratio of sp(2)/sp(3) carbons dramatically increased, suggesting an enhanced electrical conductivity of the SWCNHs. Even though the specific surface area (SSA) slightly decreased by 16% as a result of heat treatment, the specific capacitance per SSA of the SWCNH electrode remarkably increased from 22 to 47 mu F cm(-2). Such a result indicates an explicit increase in accessible effective surface area by electrolyte ions. Our result clearly showed that a higher degree of utilization for the interstitial pore of SWCNHs by solvated ions is a key factor in achieving a high volumetric capacitance of SWCNH-based supercapacitors. English American Chemical Society CAPACITANCE PORE ADSORPTION SIMULATION NANOTUBES ELECTRODE SIZE Thermal-Treatment-Induced Enhancement in Effective Surface Area of Single-Walled Carbon Nanohorns for Supercapacitor Application Article 10.1021/jp405839z 1 The Journal of Physical Chemistry C, v.117, no.49, pp.25877 - 25883 The Journal of Physical Chemistry C 117 49 25877 25883 scie scopus 000328529800001 2-s2.0-84890457114 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article CAPACITANCE PORE ADSORPTION SIMULATION NANOTUBES ELECTRODE SIZE Single-Walled Carbon Nanohorn Supercapacitor