Hydrolysis-resistant and Anti-dendritic halide composite Li3PS4-LiI solid electrolyte for all-solid-state lithium batteries

The design of solid electrolyte with resistance to dendrite growth and air stability is essential for the development of all-solid-state Li+ cells. The suppression of hydrogen sulfide was well controlled after adding the halide, and a protective layer formed to prevent the PS43− units in the electrolyte from reacting with H2O molecules. Moreover, the as-prepared low-temperature phase Li3PS4-LiI has good resistance to dendrite growth and excellent compatibility with Li metal. The Li/electrolyte/Li symmetric battery exhibits ultra-durable cycle stability for 1350 h at 0.25 mA cm−2. The details of influence rules of iodide introduction on the network and ions transmission are analyzed and proposed to explore the available electrolytes for all-solid-state battery.