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Book Sections Year : 1979

New solid electrolytes with high ionic superconductivity

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Abstract

Li glasses B2O3-x Li2O-y LiX, where X is a halogen, x ≤0.85, and y ≤0.85 and ternary fluorides with cations of high polarizability and structure derived from the CaF2 type were studied. The main technique used for studying glasses were x-ray and neutron diffraction; complex impedance measurements; NMR studies on 19F, 7Li, and 11B; and IR and Raman spectroscopies. The conductivities of ≤10-3 (Ω-cm)-1 at 150° obtained with glasses are related to the short-range ordering in these glasses. The best ternary fluoride is PbSnF4, which has a conductivity of ∼10-1 (Ω-cm)-1 at 150° and an activation energy of 0.14 eV at >80°. The presence of cation lone pairs strongly increases the mobility of the F- ions.
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hal-00134908 , version 1 (19-09-2022)

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Paul Hagenmuller, Alain Levasseur, Claude Lucat, Jean-Maurice Réau, Gérard Villeneuve. New solid electrolytes with high ionic superconductivity. P. Vashishta; G. S. Shenoy; J. N. Mundy. Fast ion transport in solids, electrodes and electrolyte, Elsevier, pp.637-642, 1979, 0-444-00353-3. ⟨hal-00134908⟩

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