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Dietrich, Christian; Sadowski, Marcel; Sicolo, Sabrina; Weber, Dominik A; Sedlmaier, Stefan J; Weldert, Kai S; Indris, Sylvio; Albe, Karsten; Janek, Jürgen; Zeier, Wolfgang G
Chemistry of materials, 12/2016, Letnik: 28, Številka: 23Journal Article
Glassy, glass–ceramic, and crystalline lithium thiophosphates have attracted interest in their use as solid electrolytes in all-solid-state batteries. Despite similar structural motifs, including PS4 3–, P2S6 4–, and P2S7 4– polyhedra, these materials exhibit a wide range of possible compositions, crystal structures, and ionic conductivities. Here, we present a combined approach of Bragg diffraction, pair distribution function analysis, Raman spectroscopy, and 31P magic angle spinning nuclear magnetic resonance spectroscopy to study the underlying crystal structure of Li4P2S6. In this work, we show that the material crystallizes in a planar structural arrangement as a glass ceramic composite, explaining the observed relatively low ionic conductivity, depending on the fraction of glass content. Calculations based on density functional theory provide an understanding of occurring diffusion pathways and ionic conductivity of this Li+ ionic conductor.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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