fig6

Figure 6. Cross-sectional SEM images of the solid-state Li-S batteries using the PO-PU-LiTFSI electrolytes with (A) 80 wt% and (B) 20 wt% LiTFSI content after plating/stripping for 50 cycles. SEM images of the Li anodes from the batteries using the PO-PU-LiTFSI electrolytes with (C) 80 wt% and (D) 20 wt% LiTFSI content after plating/stripping for 50 cycles. (E) In-situ optical microscopy images of the electrode/electrolyte interfaces of the solid-state Li-S battery after different cycles. (F) Optical microscopy images show the self-healing of the electrode/electrolyte interface. (G) Mechanism illustration of the robust interface using the PO-PU-LiTFSI electrolyte.