MS19-P08 Influence of the glass-ceramic synthesis route on the ionicconductivity of the sodium solid electrolyte Na2O-Y2O3-SiO2 (NYS) Wolfram Münchgesang (Institute of Experimental Physics - TU Bergakademie Freiberg, Freiberg, Germany) Dörthe Wagner (Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany) Mykhaylo Motylenko (Institute of Materials Science Structure Research - TU Bergakademie Freiberg, Freiberg, Germany) Jochen Schilm (Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany) David Rafaja (Institute of Materials Science Structure Research - TU Bergakademie Freiberg, Freiberg, Germany) Dirk C. Meyer (Institute of Experimental Physics - TU Bergakademie Freiberg, Freiberg, Germany)email: wolfram.muenchgesang@physik.tu-freiberg.deThe development of room temperature solid electrolytes (SEs) is one of the  keys for the realization of solid-state batteries – a post lithiumion technology, with probably better performance than this. For such a SE, a glass-ceramic synthesis route (GCSR) is particularly suitable, because this is less expensive than other production methods and can be used on an industrial scale. The maximum achievable conductivity (C) of SEs is determined by the used ionic-conductive phase (ICP), in our case this is the crystalline phase Na5YSi4O12. The practical C is decisively influenced by the microstructure of the SE, in particular the realization of a suitable percolation path; which is determined by the proportion of the ICP and their crosslinking. We will present the influence of different GCSR on the microstructure of the SE and the resulting conductivity change.References:

Keywords: sodium solid electrolyte, glass-ceramic synthesis, ionic conductivity