Abstract
Lithium-ion conducting glass-ceramic electrolyte in the composition 75Li2S · 5P2S3 · 20P2S5 (mol%) was prepared by heat treatment of an amorphous precursor. The amorphous precursor was obtained by a high-energy ball-milling process. The glass ceramic showed high ion conductivity 2.0 × 10− 3 Scm− 1 at room temperature. Raman scattering measurements suggested that the glass ceramic essentially composed of thio-phosphate anions, PS43 − and P2S64 −, as structural units. A laboratory-scale all-solid-state battery was also assembled by use of the glass ceramic as solid electrolytes and LiNi1/3Mn1/3Co1/3O2 powders as positive electrode materials. The all-solid-state battery showed good charge–discharge cycle performance at room temperature under a constant current density of 0.1 mAcm− 2.
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