Characterization of electrochemical processes in metal−organic batteries by X-ray Raman spectroscopy

Rajh, Ava (avtor), Arčon, Iztok (avtor), Bučar, Klemen (avtor), Žitnik, Matjaž (avtor), Petric, Marko (avtor), Vižintin, Alen (avtor), Bitenc, Jan (avtor), Košir, Urban (avtor), Dominko, Robert (avtor), Gretarsson, Hlynur (avtor), Sundermann, Martin (avtor), Kavčič, Matjaž (avtor)

X-ray Raman spectroscopy (XRS) is an emerging spectroscopic technique that utilizes inelastic scattering of hard Xrays to study X-ray absorption edges of low Z elements in bulk material. It was used to identify and quantify the amount of carbonyl bonds in a cathode sample, in order to track the redox reaction inside metal−organic batteries during the charge/discharge cycle. XRS was used to record the oxygen K-edge absorption spectra of organic polymer cathodes from different multivalent metal−organic batteries. The amount of carbonyl bond in each sample was determined by modeling the oxygen K-edge XRS spectra with the linear combination of two reference compounds that mimicked the fully charged and the fully discharged phases of the battery. To interpret experimental XRS spectra, theoretical calculations of oxygen K-edge absorption spectra based on density functional theory were performed. Overall, a good agreement between the amount of carbonyl bond present during different stages of battery cycle, calculated from linear combination of standards, and the amount obtained from electrochemical characterization based on measured capacity was achieved. The electrochemical mechanism in all studied batteries was confirmed to be a reduction of double carbonyl bond and the intermediate anion was identified with the help of theoretical calculations. X-ray Raman spectroscopy of the oxygen K-edge was shown to be a viable characterization technique for accurate tracking of the redox reaction inside metal−organic batteries.

• Jezik: Angleški jezik
• Ključne besede: X-ray Raman spectroscopy, meta-organic batteries, oxygen K-edge XANES, electrochemical processes, batteries, carbonyls, electrochemical cells, electrodes, oxygen
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko ; FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: Str. 5435-5442
• Številčenje: Vol. 126, iss. 12
• PID: 20.500.12556/RUL-140628
• UDK: 53
• ISSN pri članku: 1932-7455
• DOI: 10.1021/acs.jpcc.1c10622
• COBISS.SI-ID: 102127363
• Datum objave v RUL: 16.09.2022

Gradivo je del revije

• Naslov: Journal of physical chemistry. C
• Skrajšan naslov: J. phys. chem. C
• Založnik: American Chemical Society
• ISSN: 1932-7455
• COBISS.SI-ID: 513576217

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.