文献类型：期刊文献

英文题名：Effect of oxygen-containing functional groups on the impedance behavior of activated carbon-based electric double-layer capacitors

作者：Liu, Ximiao[1];Wang, Yanli[1];Zhan, Liang[1];Qiao, Wenming[1];Liang, Xiaoyi[1];Ling, Licheng[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：15

期号：2

起止页码：413

外文期刊名：JOURNAL OF SOLID STATE ELECTROCHEMISTRY

收录：;EI(收录号：20110913706190);WOS:【SCI-EXPANDED(收录号:WOS:000287526800022)】；

基金：This work was supported by the National Science Foundation of China (nos. 50730003, 50672025, and 20806024) and the Research Fund of China for the Doctoral Program of Higher Education (no. 20070251008).

语种：英文

外文关键词：Activated carbon; Electric double-layer capacitor; Impedance; Oxidation

摘要：The surface chemistry of activated carbon was treated with sulfuric acid and hydrogen to analyze the oxygen-containing functional groups on the impedance behavior of electric double-layer capacitors. Based on the electrochemical impedance spectrum (EIS), an equivalent circuit model was proposed considering the kinetic and charge transfer characteristics, and Marquardt fit procedure was applied to the EIS data. The simulated results indicate that the oxidation treatment made the ionic resistance within the pore of carbon electrode decrease, and the ion diffusion coefficients significantly increase, which leads to improvement of power capability of the carbon electrode.