Xu, Fan Lee, Chung Ho Koo, Chong Min Jung, Cheolsoo 2024-01-20T10:34:05Z 2024-01-20T10:34:05Z 2021-09-05 2014-01-01 0013-4686 https://pubs.kist.re.kr/handle/201004/127240 The electronic spatial extent (ESE) of ions was defined as a major concept for assessing the cause of overpotential in the charging and discharging processes of a nanoporous activated carbon (AC) electrode. The performance degradation of AC/Li half-cells was caused by the overpotential, which was in discord with the electrolyte conductivity and ion size. Compared to the overpotential with the salt concentration, the AC/Li half-cell with a high concentration had a smaller overpotential, and its discharge patterns were similar to the curves obtained from the half-cells with a smaller ESE of BF4- ion. The ESE is a more realistic solution for determining the overpotential of the nanoporous capacitor, such as supercapacitor and Li ion capacitor, because its capacity is dependent on the electron density at the electric double layer of the capacitor electrode. (C) 2013 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ACTIVATED CARBON ELECTRODES DOUBLE-LAYER CAPACITOR POLYMER ELECTROLYTE ENERGY CELL Effect of electronic spatial extents (ESE) of ions on overpotential of lithium ion capacitors Article 10.1016/j.electacta.2013.10.175 1 ELECTROCHIMICA ACTA, v.115, pp.234 - 238 ELECTROCHIMICA ACTA 115 234 238 scie scopus 000331424300030 2-s2.0-84888090205 Electrochemistry Electrochemistry Article ACTIVATED CARBON ELECTRODES DOUBLE-LAYER CAPACITOR POLYMER ELECTROLYTE ENERGY CELL Electronic spatial extent Overpotential Nanopore Capacitor Potential drop