KIT | KIT-Bibliothek | Impressum | Datenschutz

Effect of Particle Size and Pressure on the Transport Properties of the Fast Ion Conductor t ‐Li$_7$SiPS$_8$

Schneider, Christian; Schmidt, Christoph P.; Neumann, Anton; Clausnitzer, Moritz; Sadowski, Marcel; Harm, Sascha; Meier, Christoph; Danner, Timo; Albe, Karsten; Latz, Arnulf 1; Wall, Wolfgang A.; Lotsch, Bettina V.
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

All-solid-state batteries promise higher energy and power densities as well as increased safety compared to lithium-ion batteries by using non-flammable solid electrolytes and metallic lithium as the anode. Ensuring permanent and close contact between the components and individual particles is crucial for long-term operation of a solid-state cell. This study investigates the particle size dependent compression mechanics and ionic conductivity of the mechanically soft thiophosphate solid electrolyte tetragonal Li$_7$SiPS$_8$ (t-LiSiPS) under pressure. The effect of stack and pelletizing pressure is demonstrated as a powerful tool to influence the microstructure and, hence, ionic conductivity of t-LiSiPS. Heckel analysis for granular powder compression reveals distinct pressure regimes, which differently impact the Li ion conductivity. The pelletizing process is simulated using the discrete element method followed by finite volume analysis to disentangle the effects of pressure-dependent microstructure evolution from atomistic activation volume effects. Furthermore, it is found that the relative density of a tablet is a weaker descriptor for the sample's impedance compared to the particle size distribution. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000160329
Veröffentlicht am 10.07.2023
Originalveröffentlichung
DOI: 10.1002/aenm.202203873
Scopus
Zitationen: 12
Web of Science
Zitationen: 13
Dimensions
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 20.04.2023
Sprache Englisch
Identifikator ISSN: 1614-6832, 1614-6840
KITopen-ID: 1000160329
Erschienen in Advanced Energy Materials
Verlag Wiley-VCH Verlag
Band 13
Heft 15
Seiten Art.-Nr.: 2203873
Vorab online veröffentlicht am 03.03.2023
Schlagwörter all-solid-state batteries, impedance, ionic conductivity, particle size distribution, pressure, thiophosphates
Nachgewiesen in Scopus
Web of Science
Dimensions
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page