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Influence of synthesis parameters on crystallization behavior and ionic conductivity of the Li$_{4}$PS$_{4}$I solid electrolyte

Strauss, Florian 1,2; Lin, Jing 1,2; Janek, Jürgen 1,2; Brezesinski, Torsten ORCID iD icon 1,2
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)


Superionic solid electrolytes are key to the development of advanced solid-state Li batteries. In recent years, various materials have been discovered, with ionic conductivities approaching or even exceeding those of carbonate-based liquid electrolytes used in high-performance Li-ion batteries. Among the different classes of inorganic solid electrolytes under study, lithium thiophosphates are one of the most promising due to their high Li-ion conductivity at room temperature and mechanical softness. Here, we report about the effect of synthesis parameters on the crystallization behavior and charge-transport properties of Li$_{4}$PS$_{4}$I. We show that thermally induced crystallization of Li$_{4}$PS$_{4}$I (P4/nmm), starting from the glassy phase 1.5Li$_{2}$S–0.5P$_{2}$S$_{5}$–LiI, adversely affects the material’s conductivity. However, both conductivity and crystallization temperature can be significantly increased by applying pressure during the preparation.

Verlagsausgabe §
DOI: 10.5445/IR/1000138017
Veröffentlicht am 27.09.2021
DOI: 10.1038/s41598-021-93539-4
Zitationen: 7
Web of Science
Zitationen: 7
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2021
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000138017
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Scientific reports
Verlag Nature Research
Band 11
Heft 1
Seiten Art. Nr.: 14073
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 07.07.2021
Nachgewiesen in Scopus
Web of Science
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