Mechanochemical synthesis of lithium-ion conducting solidelectrolytes Li2OHX (X = Cl,Br) with anti-perovskite structure

摘要

All-solid-state lithium batteries have been attracted much attention as thenext-generation batteries with high energy density,high safety and long life.Sulfide-basedsolid electrolytes are promising candidates due to their high ionic conductivity and softnature,but it is concerned that toxic gases can be generated when they are exposed tomoisture.Oxide-based solid electrolytes,on the other hand,has low ionic conductivity andare hard although they have high chemical stability.Recently,a class of oxyhalide materialsLi2OHX (X;;halogen) with anti-perovskite structure are actively investigated because oftheir soft nature and relatively high ionic conductivity.In this work,we investigate a facilesynthetic route of Li2OHCl_(1-x)Brx (x = 0-1) using mechanochemical technique and theirelectrochemical properties.