リチウムイオン伝導性Li_2S-SiS_2-Li_3PO_4系オキシスルフィドガラスの結晶化に伴う構造変化

概要

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The structural change of the (100-x)(0.6Li_2S・0.4SiS_2)・xLi_3PO_4 oxysulfide glasses during crystallization was analyzed by means of solid-state nuclear magnetic resonance(NMR) and X-ray photoelectron spectroscopy(XPS). The unique tetrahedral units of SiO_nS_<4-n> (n=1, 2, 3) and PO_nS_<4-n> (n=1, 2, 3) present in the glass samples vanished and the SiS_4, SiO_4, PS_4 and PO_4 units increased with proceeding of the crystallization process. Nonbridging sulfur and oxygen atoms decreased while bridging oxygens and S^<2-> increased with proceeding of the crystallization process. Large structural difference between the glass and the corresponding crystallized sample explained the high stability against crystallization found in the oxysulfide glass with the composition of x=5.
1999-06-01