Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 274, Issue 1-3, Pages 30-38Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-3093(00)00180-0
Keywords
-
Ask authors/readers for more resources
Structure of amorphous solid electrolytes in the system Li2S-SiS2-Li4SiO4, prepared by twin-roller quenching and mechanical milling, was investigated using nuclear magnetic resonance and X-ray photoelectron spectroscopies (XPS). These spectra revealed that the structure unit comprising two silicon atoms coordinated with three non-bridging sulfur atoms and one bridging oxygen atom was mainly present in the quenched 95(0.6Li(2)S.0.4SiS(2)).5Li(4)SiO(4) glass. The glass with 5 mol% Li4SiO4 had the largest conductivity at room temperature. Amorphous solid electrolytes in the system Li2S-SiS2-Li4SiO4 were also successfully prepared from a mixture of Li2S, SiS2 and Li4SiO4 crystals using a mechanical milling technique at room temperature. The conductivities of the oxysulfide powders, mechanically milled for 20 h, were greater than or equal to 10(-4) S cm(-1) at room temperature, which were comparable to the conductivities of the corresponding glasses prepared by quenching. As the period of mechanical milling treatment was increased from 0 to 20 h, the structure of the milled powders became similar to that of the glasses prepared by quenching. Such a structure change brought about an increase of conductivity in the resultant powders from 10(-9) to 10(-4) S cm(-1). In the case of mechanochemical preparation, the reactivity of the starting materials affected the structure and formation process of the oxysulfide solid electrolytes. (C) 2000 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available