Scanning Electron Microscope images and measured Energy Dispersive X-ray Spectroscopy (EDX) data collected from pellets of Li7Si2S7I after cycling against Li metal in and symmetrical Li cell.
Images and data correspond to those shown in Figures S17 and S18 of the Supplementary Materials and shown the pellet surface and cross-section of the interface between Li7Si2S7I and Li  metal. 