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

Povzetek

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.

Ključne besede

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

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: IJS - Institut Jožef Stefan
Založnik: American Chemical Society
UDK: 544.5/.6
COBISS: 218392579 Povezava se bo odprla v novem oknu
ISSN: 2574-0962
Št. ogledov: 23
Št. prenosov: 16
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: Elektrokemija;Spektroskopija;
Vrsta dela (COBISS): Članek v reviji
Komentar vira: Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Alen Vizintin, Robert Dominko, Matjaž Kavčič; Opis vira z dne 10. 12. 2024;
Strani: str. 11135-11143
Letnik: ǂVol. ǂ7
Zvezek: ǂiss. ǂ23
Čas izdaje: Dec. 2024
DOI: 10.1021/acsaem.4c02330
ID: 25535557