Extended Data Fig. 7: Morphological study of the Li-SP-LPSCl interface during cycling in full cells.
From: Healable and conductive sulfur iodide for solid-state Li–S batteries
The cross-sectional SEM of Li/SP/LPSCl interface at different states: pristine (a), fully discharged to 1.5 V (b) and fully charged back to 3.0 V (c). It should be noted that all of the anode interfaces were cut from the full cells with the configuration of S9.3I-LPS-VGCF/LPS/LPSCl/SP/Li with a high mass loading of S9.3I 4.2 mg cm−2 running at 100 °C and at a current density of 0.32 A g−1. At the pristine state (a), both the Li/SP interface and SP/LPSCl SSE interface are well connected. After discharge (b), the thickness of Li decreases from ~50 μm to ~30 μm, the 20 μm difference corresponding to an area capacity of ~4.0 mAh cm−2. After charging back to 3.0 V (c), the thickness of Li recovers back to ~50 μm. Importantly, both the Li/SP interface and SP/LPSCl SSE interface are well maintained without the growth of Li dendrites during the discharge and charge processes.
