Journalartikel

Jahr der Veröffentlichung: 2020

Seiten: 6566-6576

Zeitschrift: Chemistry of Materials

Bandnummer: 32

Heftnummer: 15

ISSN: 0897-4756

eISSN: 1520-5002

DOI Link: https://doi.org/10.1021/acs.chemmater.0c01964

Verlag: American Chemical Society

Abstract: 
Sulfidic sodium ion conductors are currently investigated for the possible use in all-solid-state sodium ion batteries. The design of high-performing electrolytes in terms of temperature-dependent ionic transport is based upon the fundamental understanding of structure-transport relationships within the given structural phase boundaries inherent to the investigated materials class. In this work, the Na+ superionic structural family of Na11Sn2PS12 is explored by using the systematic antimony substitution with phosphorus in Na11+xSn2+x(Sb1-yPy)(1-x)S-12 A combination of Rietveld refinements against X-ray synchrotron diffraction data with electrochemical impedance spectroscopy is used to monitor the changes in the anionic framework, the Na+ substructure, and the ionic transport. A new simplified descriptor for the average Na+ diffusion pathways, the average Na+ polyhedral volume, is introduced, which is used to correlate the contraction of the overall lattice and the found activation barriers in the system. This study exemplifies how substitution affects diffusion pathways in ionic conductors and widens the knowledge about the related structural motifs and their influence on the ionic transport in this novel class of ionic conductors.

Harvard-Zitierstil: Kraft, M., Gronych, L., Famprikis, T., Ohno, S. and Zeier, W. (2020) Structure and Sodium Ion Transport in Na_11+xSn_2+x(Sb_1-yP_y)_1-xS₁₂, Chemistry of Materials, 32(15), pp. 6566-6576. https://doi.org/10.1021/acs.chemmater.0c01964

APA-Zitierstil: Kraft, M., Gronych, L., Famprikis, T., Ohno, S., & Zeier, W. (2020). Structure and Sodium Ion Transport in Na_11+xSn_2+x(Sb_1-yP_y)_1-xS₁₂. Chemistry of Materials. 32(15), 6566-6576. https://doi.org/10.1021/acs.chemmater.0c01964