20.500.12556/DiRROS-21080 Sulfur speciation in Li–S batteries determined by operando laboratory X-ray emission spectroscopy 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. X-ray emission spectroscopy lithium−sulfur batteries operando measurements oxidation state von Hamos spectrometer elektrokemija baterije akumulatorji rentgenska emisijska spektrometrija litij-žveplovi akumulatorji true false true American Chemical Society ACS applied energy materials Angleški jezik Slovenski jezik © 2024 The Authors. Published by American Chemical Society Neznano 2024-12-19 10:06:59 2024-12-19 10:17:49 2024-12-20 03:39:02 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Alen Vizintin, Robert Dominko, Matjaž Kavčič; Opis vira z dne 10. 12. 2024; str. 11135-11143 iss. 23 Vol. 7 Dec. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-12-01 544.5/.6 2574-0962 10.1021/acsaem.4c02330 218392579 https://pubs.acs.org/doi/10.1021/acsaem.4c02330 1 9bb78a30-bde8-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29872 RAZ_Rajh_Ava_2024.pdf RAZ_Rajh_Ava_2024.pdf 1 C4778DF1BBDD8D8061305A092592AED6 470607d4a624d6dbf8e878de43727fa1b7d0f6f976ed7c37ea575e78b74d9143 bb97092b-bde9-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29873 Kemijski inštitut 0 0 0