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. 2023 Jan 10;14:146. doi: 10.1038/s41467-022-35667-7

Fig. 3. Depth profiling of the LPO-NMC811 and the PS-LPO-NMC811 samples.

Fig. 3

a Schematic of synchrotron-based high energy XPS with tunable energy. b P 1 s and c O 1 s HEXPS spectra of the LPO-NMC811 sample at different photon energies of 3000 (blue lines), 6000 (red lines), and 8000 (green lines) eV. d S 1 s, e P 1 s, and f O 1 s HEXPS spectra of the PS-LPO-NMC811 sample at different photon energies of 3000 (blue lines), 6000 (red lines), and 8000 (green lines) eV.