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Mechanochemical Synthesis and Characterization of Metastable Hexagonal Li4SnS4 Solid Electrolyte

Authors :
Yoshiki Kubota
Masahiro Tatsumisago
Kento Kanazawa
Akitoshi Hayashi
Atsushi Sakuda
Misae Otoyama
Chie Hotehama
Seiya Shimono
So Yubuchi
Hiroki Ishibashi
Source :
Inorganic Chemistry. 57:9925-9930
Publication Year :
2018
Publisher :
American Chemical Society (ACS), 2018.

Abstract

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) A and c = 6.39076(8) A. 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.

Details

ISSN :
1520510X and 00201669
Volume :
57
Database :
OpenAIRE
Journal :
Inorganic Chemistry
Accession number :
edsair.doi...........861a3d07b5c2c137191d039c1551fb2e
Full Text :
https://doi.org/10.1021/acs.inorgchem.8b01049