期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 161, 期 4, 页码 H260-H263出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.094404jes
关键词
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资金
- Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
Diverse results have been reported on the differential capacitance of the metal-ionic liquid interface. Here the effect of the analysis method on the experimentally observed double layer capacitance is evaluated. A fast Fourier transform impedance spectroscopy technique allows the impedance-DC bias landscape of three 1-alkyl-3-methylimidazolium salts to be explored over a wide range of frequencies in a fraction of the time required for traditional impedance techniques. Analysis of this data set using four different methods found in the literature demonstrates how the assumptions inherent to each method alter the capacitance-DC bias curve. Careful consideration of these assumptions is necessary to compare results across the literature and understand the properties inherent to the solid-ionic liquid interface. (C) 2014 The Electrochemical Society.
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