期刊
JOURNAL OF POWER SOURCES
卷 275, 期 -, 页码 668-674出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.11.072
关键词
Carbon electrode; Electric double-layer capacitor; Mongolian anthracite; High cyclic stability
资金
- Ministry of Science, ICT and Future Planning, Republic of Korea [NRF-2012K1A3A1A19036491]
- National Research Foundation of Korea [2012K1A3A1A19036491] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Mongolian anthracite is chemically activated using potassium hydroxide as an activation agent to make activated carbon materials. Prior to the chemical activation, the chemical agent is introduced by two different methods as follows, (1) simple physical mixing, (2) impregnation. The physical properties such as specific surface area, pore volume, pore size distribution, and adsorption energy distribution are measured to assess them as carbon electrode materials for electric double-layer capacitors (EDLC). The surface functional groups and morphology are also characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) analyses respectively. The electrochemical results for the activated carbon electrodes in 3 M sulfuric acid electrolyte solution indicate that the activated Mongolian anthracite has relatively large specific capacitances in the range of 120-238 F g(-1) and very high electrochemical stability, as they keep more than 98% of initial capacitances until 1000 charge/discharge cycles. (C) 2014 Elsevier B.V. All rights reserved.
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