Crystallization Process for Superionic Li7P3S11 Glass–Ceramic Electrolytes
Abstract:The crystallization process of the 70Li2S·30P2S5 (mol%) glass was investigated to obtain a guideline for enhancing the crystallinity of Li7P3S11 crystals in a glass–ceramic. Results show that the glass softened at around 240°C and that surface crystallization of the glass started at around 250°C. The heat-treatment conditions with a maximum nucleation rate for the glass were estimated using DSC measurements. The glass–ceramic prepared using two-step heat treatment of 210°C for 30 min (nucleation) and 280°C for 1 h (crystallization) exhibited high conductivity of 5.2 × 10−3 S/cm at room temperature.
Document Type: Research Article
Affiliations: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Naka-ku, Sakai, Osaka 599-8531, Japan
Publication date: June 1, 2011