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Figure 6
Comparison of clustering masks generated from different input datasets. (a) Clustering-mask generated map with an edge-normalized XANES image of the LiNixCoyAlzO2 particle as the input. The averaged spectrum from R1, R2 and R3 are found to have Ni4+ concentrations of 0.542, 0.573 and 0.641, respectively, after we do the regular XANES fitting. (b) XANES spectra derived from the area of the three groups with the same color scheme as shown in (a). (c) Colormix of the fitting: red and green represent the distribution of Ni3+ and Ni4+, respectively. (d) Clustering-mask generated map with the fitted Ni4+ fraction as the input (linear least-square fitting with reference spectra given). The averaged spectrum from R1, R2 and R3 are found to have Ni4+ concentrations of 0.472, 0.577 and 0.683, respectively. (e) Clustering-mask generated map from XANES image without edge normalization as the input. See main text for explanation. (f) XANES spectra derived from the area of the three groups with the same color scheme as shown in (e).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 2| March 2020| Pages 567-575
https://doi.org/10.1107/S1600577520001071
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