《Ag-modification argyrodite electrolytes enable high-performance for all-solid-state lithium metal batteries》

Solid-state batteries combined with high-voltage layered cathode and lithium metal anode display good safety and high energy density, showing great potential as next-generation energy storage devices. However, the low ionic conductivity and poor stability with lithium metal of most solid electrolytes inhibit the development of solid-state lithium metal batteries. Herein, Ag+ is successfully integrated into Li5.5PS4.5Cl1.5 structure with improved ionic conductivity and better lithium metal stability for the yielded Li5.5-xAgxPS4.5Cl1.5 (x = 0, 0.02, 0.05, 0.10) electrolytes. Ag+ dopant is carefully tailored to achieve the optimal Li5.45Ag0.05PS4.5Cl1.5 electrolyte with a high Li-ion conductivity of up to 9.1 mS cm−1 and a large CCD value of 1.8 mA cm⁻². The corresponding battery with LiNi_0.6Mn_0.2Co_0.2O₂cathode and Li-In anode delivers a high initial discharge capacity of 154.9 mAh g⁻¹at 1.0C and maintains 94.5% of this value after 100 cycles.

：https://www.sciencedirect.com/science/article/pii/S1385894723020351