Inorganic Chemistry · 2018 · 99 citations · 22 references
Natural SciencesMaterials EngineeringMaterials ScienceCrystal StructureInorganic ChemistryMaterials ChemistryElectrolyte MaterialsIon-conducting MaterialsIonic ConductorsSolid ElectrolytesX-ray CrystallographyX-ray DiffractionActivation Energy For Ionic ConductionLithium-ion ConductivityLithium-ion ConductorsMechanochemical Materials SynthesisMechanochemical SynthesisPowder DiffractionSynchrotron X-ray DiffractionUnit Cell Parameters
A new crystalline lithium-ion conducting material, Li4SnS4 with an ortho-composition, was prepared by a mechanochemical technique and subsequent heat treatment. Synchrotron X-ray powder diffraction was used to analyze the crystal structure, revealing a space group of P63/mmc and cell parameters of a = 4.01254(4) Å and c = 6.39076(8) Å. Analysis of a heat-treated hexagonal Li4SnS4 sample revealed that both lithium and tin occupied either of two adjacent tetrahedral sites, resulting in fractional occupation of the tetrahedral site (Li, 0.375; Sn, 0.125). The heat-treated hexagonal Li4SnS4 had an ionic conductivity of 1.1 × 10–4 S cm–1 at room temperature and a conduction activation energy of 32 kJ mol–1. Moreover, the heat-treated Li4SnS4 exhibited a higher chemical stability in air than the Li3PS4 glass-ceramic.
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High-power all-solid-state batteries using sulfide superionic conductors
Yuki Kato, Satoshi Hori, Toshiya Saito et al. · Nature Energy · 2016 · 3.4K citations
Natural Sciences, Materials Engineering, Materials Science +14