Moisture Stability of Sulfide Solid-State Electrolytes

In this report we detail a comprehensive study on the moisture stability of sulfide solid-state electrolytes in dry room environments. Although SSEs have many favorable attributes, class materials suffers from poor with water. Sulfide react water to form gaseous H 2 S and variety solid byproducts like Li 3 PO 4 LiOH, which go increase interfacial impedance batteries. Lab-scale research typically utilizes gloveboxes <1 ppm water, however, large-scale manufacturing Li-ion batteries occurs ?40°C dewpoint rooms around 126 Consequently, must be addressed if manufacture based is scaled up. Here, are first characterize according both degradation ionic conductivity at different setpoints ranging ?76°C dewpoint. A SSE compositions studied; namely, (Li S) 75 (P 5 ) 25 , 70 30 O) 7 68 63 + 20 mol% LiI. We find that improves modifier content introduction O co-modifier. After min exposure environment found LiI powder generated 0.1 cc/g its decreased by over 50%. However, when was exposed as slurry dodecane carrier same composition 0 only dropped 14%. Our results show acceptable appropriately processed environment.