| Abstract
| - High lithium ion conducting materials were mechanochemically synthesized using Li3Nand SiS2 as starting materials. The obtained Li3N−SiS2 materials were almost amorphous;the amorphous phases consisted of SiS4 tetrahedral units with no edge sharing and thelocal structure was very similar to that of mechanically milled Li2S−SiS2 amorphousmaterials. High lithium ion conducting Li3N−SiS2 materials could be synthesized in veryshort milling periods, around 20 min, since explosive reactions occurred in this system. Themechanically milled 40Li3N·60SiS2 (mol %) material exhibited excellent properties as solidelectrolytes such as high conductivity around 10-4 S cm-1 at room temperature, unity oflithium ion transport number, and a wide electrochemical window of about 10 V vs Li+/Li.
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