メカニカルミリングにより作製した高リチウムイオン伝導性60Li_2S・40SiS_2非晶質材料の生成プロセス

概要

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The formation process of 60Li_2S・40SiS_2 lithium ion conducting materials prepared by mechanical milling was investigated by X-ray diffraction (XRD), ^<29>Si magic angle spinning nuclear magnetic resonance (MAS NMR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM) observation. Upon mechanical milling for only 1 h most SiS_2 particles reacted with Li_2S crystals to form partially amorphous materials. Such material reacted with the residual Li_2S crystals by further mechanical milling treatments, until the composition of the amorphous part became the nominal one. Since the fully amorphous part became dominant in a continuously percolated structure, the ion conductivity could be greatly improved from 10^<-10> to 10^<-4> S・cm^<-1> at room temperature.
社団法人日本セラミックス協会の論文
2000-11-01