期刊
CHEMICAL PHYSICS LETTERS
卷 504, 期 4-6, 页码 153-158出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2011.01.072
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资金
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [ERKCC61]
- National Science Foundation [NSF-CBET-0852353]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- Directorate For Engineering [852353] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [852353] Funding Source: National Science Foundation
The differential capacitance of electric double layers in ionic liquids and its correlation with the surface charge density, ion size and concentration are studied within the framework of the classical density functional theory (DFT). As prescribed by previous analytical theories, DFT is able to reproduce the transition in the differential capacitance versus the surface potential curve from the 'camel' shape to the 'bell' shape when the ionic density increases. However, DFT predicts alternating layers of cations and anions at the charged surface that cannot be described by the classical Gouy-Chapman-Stern model and its modifications. (C) 2011 Elsevier B.V. All rights reserved.
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