Ava Rajh (Author), Alen Vižintin (Author), Joanna Hoszowska (Author), Robert Dominko (Author), Matjaž Kavčič (Author)

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.

Keywords

elektrokemija;baterije;akumulatorji;rentgenska emisijska spektrometrija;litij-žveplovi akumulatorji;X-ray emission spectroscopy;lithium−sulfur batteries;operando measurements;oxidation state;von Hamos spectrometer;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: IJS - Jožef Stefan Institute
Publisher: American Chemical Society
UDC: 544.5/.6
COBISS: 218392579 Link will open in a new window
ISSN: 2574-0962
Views: 23
Downloads: 16
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Other data

Secondary language: Slovenian
Secondary keywords: Elektrokemija;Spektroskopija;
Type (COBISS): Article
Source comment: Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Alen Vizintin, Robert Dominko, Matjaž Kavčič; Opis vira z dne 10. 12. 2024;
Pages: str. 11135-11143
Volume: ǂVol. ǂ7
Issue: ǂiss. ǂ23
Chronology: Dec. 2024
DOI: 10.1021/acsaem.4c02330
ID: 25535557