journal article·2023-08-14Open access

Dissolution and Recrystallization Behavior of Li3PS4 in Different Organic Solvents with a Focus on N-Methylformamide

Kerstin Wissel, Luise M. Riegger, Christian Schneider, Aamir I. Waidha, Theodosios Famprikis, Yuji Ikeda, Blazej Grabowski, Robert E. Dinnebier, Bettina V. Lotsch, Jürgen Janek, Wolfgang Ensinger, Oliver Clemens

ACS Applied Energy Materials· Volume 6· Issue 15

Abstract

Solid-state batteries can be built based on thiophosphate electrolytes such as β-Li 3 PS 4 . For the preparation of these solid electrolytes, various solvent-based routes have been reported. For recycling of end-of-life solid-state batteries based on such thiophosphates, we consider the development of dissolution and recrystallization strategies for the recovery of the model compound β-Li 3 PS 4 . We show that recrystallization can only be performed in polar, slightly protic solvents such as N -methylformamide (NMF). The recrystallization is comprehensively studied, showing that it proceeds via an intermediate phase with composition Li 3 PS 4 ·2NMF, which is structurally characterized. This phase has a high resistivity for the transport of lithium ions and must be removed in order to obtain a recrystallized product with a conductivity similar to the pristine material. Moreover, the recrystallization from solution results in an increase of the amorphous phase fraction next to crystalline β-Li 3 PS 4 .
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Extraction and Separation Processes

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute for Materials Science, Materials Analysis, Technical University of Darmstadt, Alarich-Weiss-Straβe 2, 64287 Darmstadt, Germany

Institute for Physical Chemistry, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 17, 35392 Gießen, Germany

Center for Materials Research (ZfM), Justus-Liebig-University Gießen, Heinrich-Buff-Ring 17, 35392 Gießen, Germany

Max Planck Institute for Solid State Research, Heisenbergstraβe 1, 70569 Stuttgart, Germany

Department of Radiation Science and Technology, Delft University of Technology, Mekelweg 15, Delft 2629JB, The Netherlands

Institute for Materials Science, Materials Design, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany

Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany

Institute for Materials Science, Chemical Materials Synthesis, University of Stuttgart, Heisenbergstraβe 3, 70569 Stuttgart, Germany

Funding

Bundesministerium für Bildung und Forschung · Deutsche Forschungsgemeinschaft · H2020 European Research Council · Hessen Agentur

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