Faculty of Chemistry , University of Warsaw , 02-093 Warsaw , Poland.
ACS Appl Mater Interfaces. 2019 Feb 13;11(6):6015-6021. doi: 10.1021/acsami.8b19181. Epub 2019 Feb 1.
Solid electrolytes are the key to realize future solid-state batteries that show the advantages of high energy density and intrinsic safety. However, most solid electrolytes require long time and energy-consuming synthesis conditions of either extended ball milling or high-temperature solid-state reactions, impeding practical applications of solid electrolytes for large-scale systems. Here, we report a new and rapid liquid-based synthetic method for preparing a high-purity LiPS solid electrolyte through the stoichemical reaction of LiPS and LiS. This method relies on facile and low-cost solution-based soft chemistry to complete chemical reaction in extensively short time (2 h). The prepared LiPS solid electrolyte shows a high phase purity, an impressive ionic conductivity (0.11 mS cm), and a reasonable electrochemical stability with a metallic lithium anode. Our results highlight the use of an economic and nontoxic solvent to quickly synthesize a LiPS solid electrolyte, which would promote the development of solid-state batteries for next-generation energy storage systems.
固体电解质是实现未来具有高能量密度和固有安全性的固态电池的关键。然而，大多数固体电解质需要长时间和高能量消耗的合成条件，要么是延长球磨时间，要么是进行高温固态反应，这阻碍了固体电解质在大规模系统中的实际应用。在这里，我们报告了一种新的快速液态合成方法，通过 LiPS 和 LiS 的化学计量反应来制备高纯 LiPS 固体电解质。该方法依赖于简便且低成本的基于溶液的软化学，可在极短的时间（2 小时）内完成化学反应。所制备的 LiPS 固体电解质具有高的相纯度、令人印象深刻的离子电导率（0.11 mS cm）和与金属锂阳极的合理电化学稳定性。我们的结果突出了使用经济且无毒的溶剂快速合成 LiPS 固体电解质，这将促进下一代储能系统的固态电池的发展。
