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Preparation of ambient air-stable electrolyte Li4SnS4 by aqueous ion-exchange process
Solid State Ionics ( IF 3.0 ) Pub Date : 2019-12-19 , DOI: 10.1016/j.ssi.2019.115190
Reiko Matsuda , Takumi Kokubo , Nguyen Huu Huy Phuc , Hiroyuki Muto , Atsunori Matsuda

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 × 104 Scm1 at room temperature.



中文翻译:

水离子交换法制备环境稳定的电解质Li 4 SnS 4

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。

更新日期:2019-12-19
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