About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Energy Materials for Sustainable Development
|
Presentation Title |
Using Mechanochemistry to Explore New Sodium Ion Conducting Glasses and Glass-Ceramics |
Author(s) |
Louisiane Verger, Jiajie Zhang, David Le Coq, Laurent Calvez, François Cheviré, Virginie Nazabal, Julien Trébosc, Olivier Lafon, Olivier Hernandez, Steve W. Martin |
On-Site Speaker (Planned) |
Louisiane Verger |
Abstract Scope |
Sulfur-based glasses are attracting growing interest as solid-state electrolytes because of their high ionic conductivity compared to their oxide counterparts, and their soft mechanical properties. They are classically synthesized by the melt quenching method in silica tube. However, this process poses problems of safety, scalability, cost and limits the glass compositions available, due to the reactivity of alkali with silica. An alternative to high-temperature syntheses and solvent-based processes is the use of mechanical milling techniques. In this talk, we show how mechanochemistry can be used to extend the glass forming domain in the Na2S-Ga2S3 pseudo binary and the Na2S-Ga2S3-GeS2 pseudo ternary. The conductivity properties and structure of these new Na and Ga-rich glasses are discussed. Crystallization tests are also performed to obtain glass-ceramics in these systems, and crystalline NaGaS2 is obtained by annealing the glass above its glass transition temperature. |