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Figure 4. Structural stability and SEI composition of different anodes. SEM images of surface topography for (A) composite anode and (B) pure Li metal anode after cycling; high-resolution XPS analysis of (C and D) C 1s and (E and F) F 1s spectra for the composite anode and pure Li metal anode after cycling; (G and H) Nyquist plots of NCM811 full cells with the above two anodes after different cycles;
