Advances in X-Ray Chemical Analysis, Japan
Online ISSN : 2758-3651
Print ISSN : 0911-7806
Analytical Application
Surface Structure Analysis of Ionic Liquids with and without Lithium Ion by XPS
Yuma KASAMA, Shintaro ICHIKAWA, Ayuko KITAJOU, Tsutomu KURISAKI
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Keywords: Structure analysis, X-ray photoelectron spectroscopy, Ionic liquid, Valence band, X-ray irradiation
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2022 Volume 53 Pages 151-163

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Abstract

To clarify a surface state of ionic liquid and its lithium salt solution, X-ray photoelectron spectroscopy (XPS) was applied to a neat ionic liquid N, N-Diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)imide (DEME-TFSI) with and without a lithium salt of Li TFSI. Core level peaks were recorded for Li 1s, C 1s, N 1s, O 1s, F 1s and S 2p. Valence band XPS spectra (0-40 eV bond energy) were also studied. The structure of ionic liquids under X-ray irradiation was investigated by time-dependence measurements of Li 1s, F 1s and N 1s spectra.

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© 2022 The Discussion Group of X-Ray Analysis, The Japan Society for Analytical Chemistry
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