Journal
ELECTROCHIMICA ACTA
Volume 206, Issue -, Pages 419-426Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.10.060
Keywords
in situ X-ray photoelectron spectroscopy; Room-temperature ionic liquid; Carbide derived carbon; Micromesoporous carbon; Electrode materials for electrical double layer capacitors
Categories
Funding
- Estonian Ministry of Education and Research [SF0180002s08, SF0180046s07, IUT2-25, IUT20-13]
- Estonian Centre of Excellence: Materials for Sustainable Development [TK 117T]
- Estonian Science Foundation [8737]
- Estonian Energy Technology project [3.2.0501.10-0015]
- European Spallation Source project [3.2.0601.11-0001]
- Modernization of Scientific Infrastructure project [3.2.0.02.10-0169]
- ERDF [IRGLASS 3.2.1101.12-0027]
- Graduate School on Functional Materials and Technologies [1.2.0401.09-0079]
- European Community's Seventh Framework Program [226716]
- [3.2.1101.12-0019]
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Negatively charged 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF(4)) | Mo2C derived micromesoporous carbon (C) electrode interface has been studied using in situ synchrotron radiation initiated X-ray photoelectron spectroscopy (XPS) in order to estimate true potentials when slow electrochemical processes start at the C electrode used in the supercapacitors. A three-electrode system within the very wide working electrode (WE) potential region down to -1.90 V (vs. Ag/AgCl wire in EMImBF(4)) has been used for the polarization of the C WE during the in situ XPS measurements. Parallel to XPS measurements in high vacuum chamber, the cyclic voltammetry measurements in the three-electrode system were carried out in the Ar-filled glovebox in order to obtain electrochemical data down to -2.40 V (vs. Ag/AgCl wire in EMImBF(4)) for studied C electrode material. WE potential vs. XPS spectra relationship has been established and discussed here. (c) 2015 Elsevier Ltd. All rights reserved.
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