fig4

Figure 4. XPS spectra of NCA and NCA-6000 (A and B) Ni 2p; (C and D) Al 2p; (E and F) C 1s; (G and H) O 1 s; (I) the proportion of different components.
Figure 4. XPS spectra of NCA and NCA-6000 (A and B) Ni 2p; (C and D) Al 2p; (E and F) C 1s; (G and H) O 1 s; (I) the proportion of different components.
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