| Title: | Sulfur speciation in Li–S batteries determined by operando laboratory X-ray emission spectroscopy |
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| Authors: | ID Rajh, Ava (Author)
ID Vižintin, Alen (Author)
ID Hoszowska, Joanna (Author)
ID Dominko, Robert (Author)
ID Kavčič, Matjaž (Author) |
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| Files: |  URL - Source URL, visit https://pubs.acs.org/doi/10.1021/acsaem.4c02330
 PDF - Presentation file, download (2,22 MB)
MD5: C4778DF1BBDD8D8061305A092592AED6
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  KI - National Institute of Chemistry
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| Abstract: | In this work, operando sulfur X-ray emission measurementson a Li−S battery cathode were performed using a laboratory setup as analternative to more common synchrotron radiation based absorptionstudies. Photoexcitation by an X-ray tube was used. Valence-to-core Kβ X-ray emission spectra were recorded with a wavelength dispersive crystalspectrometer in von Hamos geometry, providing excellent energyresolution and good detection efficiency. The setup was used to recordex situ S Kβ emission spectra from S cathodes from the Li−S battery andalso under operando conditions. Average S oxidation state within thebattery cathode during battery cycling was determined from the shape ofthe Kβ emission spectra. A more detailed S species characterization wasperformed by fitting a linear combination of previously measuredlaboratory synthesized standards to the measured spectra. Relative amounts of different S species in the cathode were determinedduring the cycling of the Li−S battery. The main advantage of X-ray emission spectroscopy is that it can be performed onconcentrated samples with S loading comparable to a real battery. The approach shows great promise for routine laboratory analysisof electrochemical processes in Li−S batteries and other sulfur-based systems under operando conditions. |
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| Keywords: | X-ray emission spectroscopy, lithium−sulfur batteries, operando measurements, oxidation state, von Hamos spectrometer |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.12.2024 |
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| Publisher: | American Chemical Society |
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| Year of publishing: | 2024 |
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| Number of pages: | str. 11135-11143 |
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| Numbering: | Vol. 7, iss. 23 |
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| Source: | ACS applied energy materials |
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| PID: | 20.500.12556/DiRROS-21080  |
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| UDC: | 544.5/.6 |
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| ISSN on article: | 2574-0962 |
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| DOI: | 10.1021/acsaem.4c02330 |
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| COBISS.SI-ID: | 218392579 |
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| Copyright: | © 2024 The Authors. Published by American Chemical Society |
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| Note: | Nasl. z nasl. zaslona;
Soavtorji iz Slovenije: Alen Vizintin, Robert Dominko, Matjaž Kavčič;
Opis vira z dne 10. 12. 2024;
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| Publication date in DiRROS: | 19.12.2024 |
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| Views: | 26 |
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| Downloads: | 19 |
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