Hyperspectral full-field quick-EXAFS imaging at the ROCK beamline for monitoring micrometre-sized heterogeneity of functional materials under process conditions

Briois, V.; Itié, J.P.; Polian, A.; King, A.; Traore, A.S.; Marceau, E.; Ersen, O.; La Fontaine, C.; Barthe, L.; Beauvois, A.; Roudenko, O.; Belin, S.

doi:10.1107/S1600577524006581

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Figure 12
(a) Evolution of the spectra averaged over the full FoV during the monitoring of the 1 C charge of electrode 2, mimicking the outcome of quick-EXAFS monitoring without spatial resolution. (b) Evolution of the spectra averaged over the RoI displayed in (c) during the monitoring of the 1 C charge of electrode 2. (c) LFP distribution map at half Li deintercalation obtained at 5.2 µm × 5.2 µm spatial resolution. (d) Concentration profiles as a function of time obtained during the monitoring of the 1 C charge of electrode 2 by MCR-ALS of data measured over the FoV in (a) – dashed lines – or over the RoI in (b) – full lines. Spectra isolated for the RoI as pure spectra of LFP and FP species were used as equality constraints for the MCR-ALS minimization of the dataset recorded over the FoV.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 31| Part 5| September 2024| Pages 1084-1104

https://doi.org/10.1107/S1600577524006581

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