20.500.12556/RUL-140628 Characterization of electrochemical processes in metal−organic batteries by X-ray Raman spectroscopy 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. X-ray Raman spectroscopy meta-organic batteries oxygen K-edge XANES electrochemical processes batteries carbonyls electrochemical cells electrodes oxygen true false true Angleški jezik Ni določen Članek v reviji 2022-09-16 12:38:18 2022-09-16 12:38:19 2022-09-24 04:12:16 0000-00-00 00:00:00 2022 0 0 Str. 5435-5442 iss. 12 Vol. 126 Mar. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 53 1932-7455 10.1021/acs.jpcc.1c10622 102127363 acs.jpcc.1c10622_Characterization_of_Electrochemical_Processes_in_Metal-Organic_Batteries.pdf acs.jpcc.1c10622_Characterization_of_Electrochemical_Processes_in_Metal-Organic_Batteries.pdf 1 878C6791E8A10B5D2269A3DB04ABE539 750fe8b50e261eed0d8e3915fa1e63bc3d51d8dc61ce7b5c034402a6fe6e4afb 2a6e5734-3b27-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=162056 https://pubs.acs.org/doi/10.1021/acs.jpcc.1c10622 1 9c7b8c14-35ab-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=161410 Fakulteta za matematiko in fiziko Fakulteta za kemijo in kemijsko tehnologijo 0 0 0