Sulfide-based solid electrolytes (SEs) are promising as an application in all-solid-state lithium batteries due to their high ionic conductivities and suitable plasticity in forming good contact with electrode active materials. In addition, stability in ambient air is one of the most important requirements for these electrolytes. Recently, there have been many studies about Li₄SnS₄ because of its good stability against H₂O in ambient air. This paper reports our development of a unique preparation process of Li₄SnS₄ in aqueous solution, namely, ion-exchange (IE). The crystalline structure of Li₄SnS₄ obtained via this process was confirmed by XRD patterns. The residual amount of Na ions in the Li₄SnS₄ after the IE process was found to be less than a few percent of the atomic ratio compared to Li ions obtained by ion chromatography. The ionic conductivity of the Li₄SnS₄ was 1.0 × 10⁻⁴ Scm⁻¹ at room temperature.

基于硫化物的固体电解质（SEs）具有很高的离子电导率和在与电极活性材料形成良好接触方面的适当可塑性，因此有望在全固态锂电池中得到应用。另外，对于这些电解质，环境空气的稳定性是最重要的要求之一。近年来，由于Li ₄ SnS ₄对环境空气中的H ₂ O具有良好的稳定性，因此已经进行了许多研究。本文报道了我们开发的一种独特的Li ₄ SnS ₄水溶液制备方法，即离子交换（IE）。Li ₄ SnS ₄的晶体结构通过XRD图谱证实了通过该过程获得的产物。与通过离子色谱法获得的锂离子相比，IE处理后的Li ₄ SnS _4中的Na离子残留量小于原子比的百分之几。锂的离子电导率₄的SnS ₄为1.0×10 ^{- 4}  SCM ^{- 1}在室温下。