Fig. 3: The correlation between the local surface reconstruction and the bulk porosity. | Nature Communications

Fig. 3: The correlation between the local surface reconstruction and the bulk porosity.

From: Mutual modulation between surface chemistry and bulk microstructure within secondary particles of nickel-rich layered oxides

Fig. 3

a The particle morphology and the surface (~5 nm depth) Ni valence state distribution. b The bulk porosity map. c The line profile from points A to B as illustrated in a, b. The ξ is the ratio between the TEY intensity at 856.2 eV and the sum of that at 854.0 eV and 856.2 eV pixel by pixel, which represents relative Ni valence state. d The correlation plot for all the data points in a, b. The plot is color coded to the density of the data point (see colormap in the inset). A weak but clear negative correlation (see regression line in d) is observed between the surface Ni valence state and the bulk porosity. The scale bar in b is 5 μm.

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