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Slurry-Based Processing of Solid Electrolytes: A Comparative Binder Study

Riphaus, Nathalie; Strobl, Philipp; Stiaszny, Barbara; Zinkevich, Tatiana 1; Yavuz, Murat 1; Schnell, Joscha; Indris, Sylvio 1; Gasteiger, Hubert A.; Sedlmaier, Stefan J.
1 Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS), Karlsruher Institut für Technologie (KIT)


Limited energy density of today's Li-ion battery technologies demands for novel cell technologies, such as the all-solid-state battery (ASSB). In order to achieve high energy densities and enable large-scale processing, thin and flexible solid electrolyte (SE) layers have to be implemented. This study focuses on slurry-based processing of the sulfidic solid electrolyte Li$_{10}$SnP$_{2}$S$_{12}$ (LSPS). Various polymers were investigated concerning their suitability as binders for thin and freestanding SE sheets. We conducted a parameter study in order to optimize e.g. LSPS-to-binder ratio, solids content and porosity. Significant differences were found with regard to the minimum amount of binder required for mechanically stable sheets as well as the homogeneity, density and flexibility of the resulting SE layers. The impacts of binder type and weight fraction on ionic conductivity were examined through lithium diffusion measurements. Impedance analysis was conducted in comparison, proving sufficiently high ionic conductivity for potential application of the SE sheets in ASSB. This work highlights the important role of the polymeric binder in slurry-based processing of SEs and gives an impression how important a well-considered selection of parameters is to achieve good processing properties as well as desirable features for the final SE sheet.

Verlagsausgabe §
DOI: 10.5445/IR/1000089322
Veröffentlicht am 10.01.2019
DOI: 10.1149/2.0961816jes
Zitationen: 45
Web of Science
Zitationen: 44
Zitationen: 46
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 0013-4651, 1945-7111
KITopen-ID: 1000089322
HGF-Programm 37.01.02 (POF III, LK 01) Components and Cells
Erschienen in Journal of the Electrochemical Society
Verlag Electrochemical Society
Band 165
Heft 16
Seiten A3993–A3999
Vorab online veröffentlicht am 22.12.2018
Schlagwörter Batteries - Lithium, All-solid-state battery, slurry processing, sulfide solid electrolyte
Nachgewiesen in Scopus
Web of Science
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