Sulfur speciation in Li–S batteries determined by operando laboratory X-ray emission spectroscopy

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

In this work, operando sulfur X-ray emission measurements on a Li−S battery cathode were performed using a laboratory setup as an alternative to more common synchrotron radiation based absorption studies. Photoexcitation by an X-ray tube was used. Valence-to-core Kβ X-ray emission spectra were recorded with a wavelength dispersive crystal spectrometer in von Hamos geometry, providing excellent energy resolution and good detection efficiency. The setup was used to record ex situ S Kβ emission spectra from S cathodes from the Li−S battery and also under operando conditions. Average S oxidation state within the battery cathode during battery cycling was determined from the shape of the Kβ emission spectra. A more detailed S species characterization was performed by fitting a linear combination of previously measured laboratory synthesized standards to the measured spectra. Relative amounts of different S species in the cathode were determined during the cycling of the Li−S battery. The main advantage of X-ray emission spectroscopy is that it can be performed on concentrated samples with S loading comparable to a real battery. The approach shows great promise for routine laboratory analysis of electrochemical processes in Li−S batteries and other sulfur-based systems under operando conditions.

• Jezik: Angleški jezik
• Ključne besede: X-ray emission spectroscopy, lithium−sulfur batteries, operando measurements, oxidation state, von Hamos spectrometer
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 11135-11143
• Številčenje: Vol. 7, iss. 23
• PID: 20.500.12556/RUL-165866
• UDK: 544.5/.6
• ISSN pri članku: 2574-0962
• DOI: 10.1021/acsaem.4c02330
• COBISS.SI-ID: 218392579
• Datum objave v RUL: 12.12.2024

Gradivo je del revije

• Naslov: ACS applied energy materials
• Skrajšan naslov: ACS app. energy mater.
• Založnik: American Chemical Society
• ISSN: 2574-0962
• COBISS.SI-ID: 39550725

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: litij-žveplove baterije, elektrokemija, spektroskopija