fig4

Figure 4. Post-mortem SEM (A-F) and XPS (G) analyses of Li||Li cells after 50 cycles at 0.5 mA cm^-2 (0.5 mAh cm^-2). Post-mortem SEM and optical (inlets) images of electrodes harvested from (A) BE × GB, (B) BE × DR, (C) AE-FEC × GB, (D) AE-FEC × DR, (E) AE-VC × GB, and (F) AE-VC × DR, and atomic distribution of in situ formed SEIs of the same cell setups calculated and averaged by XPS analysis (G).