May 2016Insight into the crystallization of amorphous glassesInformation on interatomic distances in glassy inorganic solids can be revealed by X-ray pair-distribution-function analysis (X-PDF). The lithium superionic conductor Li7P3S11 can be crystallized from the amorphous (Li2S)70(P2S5)30 glass. The ionic conductivity of the glass-ceramic (σ25 ≈ 10-2 Scm-1) is able to compete with pertinent liquid battery electrolytes. In the PDF, only sharp peaks corresponding to the first coordination sphere of thio-phosphate tetrahedra at 2.03 Å, (P-S-bonding length, green) and 3.37 Å (S-S-bonding length, blue) are apparent because there is no long-range ordering of the atoms. In contrast, intensive signals can be found far beyond 20 Å for the metastable glass-ceramic Li7P3S11 as well as the thermodynamic stable degradation product Li4P2S6.(Picture submitted by Christian Dietrich, Dominik Weber and Wolfgang Zeier; data collection was performed at the 11-ID-B beamline of the Argonne National Laboratory.)https://www.uni-giessen.de/en/faculties/f08/departments/physchem/janek/gallerypotm/pom2016/BdM0516.jpg/viewhttps://www.uni-giessen.de/@@site-logo/logo.png
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May 2016
Insight into the crystallization of amorphous glassesInformation on interatomic distances in glassy inorganic solids can be revealed by X-ray pair-distribution-function analysis (X-PDF). The lithium superionic conductor Li7P3S11 can be crystallized from the amorphous (Li2S)70(P2S5)30 glass. The ionic conductivity of the glass-ceramic (σ25 ≈ 10-2 Scm-1) is able to compete with pertinent liquid battery electrolytes. In the PDF, only sharp peaks corresponding to the first coordination sphere of thio-phosphate tetrahedra at 2.03 Å, (P-S-bonding length, green) and 3.37 Å (S-S-bonding length, blue) are apparent because there is no long-range ordering of the atoms. In contrast, intensive signals can be found far beyond 20 Å for the metastable glass-ceramic Li7P3S11 as well as the thermodynamic stable degradation product Li4P2S6.(Picture submitted by Christian Dietrich, Dominik Weber and Wolfgang Zeier; data collection was performed at the 11-ID-B beamline of the Argonne National Laboratory.)
