Baniere_site_sciencesconf_v2ter.jpeg

Ionic conduction pathways in chalcogenide glasses: experimental evidence and modelling
Daniele Fontanari  1  , Anton Sokolov  1  , Arnaud Cuisset  1  , Alex Hannon  2  , Chris Benmore  3  , Eugene Bychkov  1, *@  
1 : University of Littoral  (ULCO)  -  Website
university of Littoral
189A avenue Maurice Schumann, 59140 Dunkerque -  France
2 : STFC Rutherford Appleton Laboratory  (RAL)  -  Website
Harwell Campus, Didcot OX11 0FA -  United Kingdom
3 : Advanced Photon Source [ANL]  (APS)  -  Website
Argonne National Laboratory Building 401 9700 S. Cass Avenue Argonne, IL 60439 -  United States
* : Corresponding author

Extended R&D in the field of alternative energy sources stimulates studies of all-solid-state lithium and sodium batteries for portable electronics, transport and stationary applications. Chalcogenide vitreous electrolytes and glass/ceramic composites belong to promising functional materials offering record-high ionic conductivity and advanced charge/discharge cycling. The origin of the superionic mobility in a chalcogenide glass remains an open question often related to preferential conduction pathways formed in the disordered network. Using pulsed neutron and high-energy X-ray diffraction combined with RMC/DFT modeling, we will unveil the nature of ionic conduction pathways in glassy chalcogenides. The tracer diffusion experiments and Raman spectroscopy measurements yield an independent verification of the proposed scenario providing a deeper insight into the interesting and practically important phenomenon.



  • Presentation
Online user: 1 RSS Feed