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Park, Su-Moon
Electrochemistry Lab
Research Interests
  • Electrochemistry and spectroscopy of conducting polymers

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Development of Galvanostatic Fourier Transform Electrochemical Impedance Spectroscopy

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Title
Development of Galvanostatic Fourier Transform Electrochemical Impedance Spectroscopy
Author
Nam, Kwang-MoShin, Dong-HyupJung, NamchulJoo, Moon G.Jeon, SangminPark, Su-MoonChang, Byoung-Yong
Keywords
Charge/discharge cycle; Electrochemical reactions; Frequency response analyses (FRA); Galvanostatics; Noise levels; Potential change; Potentiostatic techniques; Potentiostatics; Relevant relations; Semiconductive
Issue Date
201302
Publisher
AMER CHEMICAL SOC
Citation
ANALYTICAL CHEMISTRY, v.85, no.4, pp.2246 - 2252
Abstract
Here, we report development of the galvanostatic Fourier transform electrochemical impedance spectroscopy (FTEIS), which monitors impedance of electrochemical reactions activated by current steps. We first derive relevant relations for potential change upon application of a step current, obtain impedances theoretically from the relations by simulation, and verify them with experimental results. The validity of the galvanostatic FTEIS technique is demonstrated by measuring impedances of a semiconductive silicon wafer using the conventional frequency response analysis (FRA), the potentiostatic FTEIS, and the galvanostatic FTEIS methods, and the results are in excellent agreement with each other. This work is significant in that the galvanostatic FTEIS would allow one to record impedance changes during charge/discharge cycles of secondary batteries and fuel cells as well as electrochemically irreversible systems which may produce noise level chronoamperometric currents by potentiostatic techniques.
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DOI
http://dx.doi.org/10.1021/ac303108n
ISSN
0003-2700
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