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A Structurally Flexible Halide Solid Electrolyte with High Ionic Conductivity and Air Processability

Karkera, Guruprakash 1; Soans, Mervyn 1; Akbaş, Ayça; Witter, Raiker 2; Euchner, Holger; Diemant, Thomas 1; Cambaz, Musa Ali 1; Meng, Zhen 2; Dasari, Bosubabu 2; Chandrappa, Shivaraju Guddehalli 1; Menezes, Prashanth W.; Fichtner, Maximilian 2
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


In this work, a structurally revivable, chloride-ion conducting solid electrolyte (SE), CsSn$_{0.9}$In$_{0.067}$Cl$_3$, with a high ionic conductivity of 3.45 × 10$^{−4}$ S cm$^{−1}$ at 25 °C is investigated. The impedance spectroscopy, density functional theory, solid-state $^{35}$Cl NMR, and electron paramagnetic resonance studies collectively reveal that the high Cl$^−$ ionic mobility originates in the flexibility of the structural building blocks, Sn/InCl$_6$ octahedra. The vacancy-dominated Cl$^−$ ion diffusion encompasses co-ordinated Sn/In(Cl) site displacements that depend on the exact stoichiometry, and are accompanied by changes in the local magnetic moments. Owing to these promising properties, the suitability of the CsSn$_{0.9}$In$_{0.067}$Cl$_3$, as an electrolyte is demonstrated by designing all-solid-state batteries, with different anodes and cathodes. The comparative investigation of interphases with Li, Li–In, Mg, and Ca anodes reveals different levels of reactivity and interphase formation. The CsSn$_{0.9}$In$_{0.067}$Cl$_3$ demonstrates an excellent humidity tolerance (up to 50% relative humidity) in ambient air, maintaining high structural integrity without compromises in ionic conductivity, which stands in contrast to commercial halide-based lithium conductors. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000160180
Veröffentlicht am 05.07.2023
DOI: 10.1002/aenm.202300982
Zitationen: 3
Web of Science
Zitationen: 2
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1614-6832, 1614-6840
KITopen-ID: 1000160180
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Advanced Energy Materials
Verlag Wiley-VCH Verlag
Band 13
Heft 30
Seiten Art.-Nr.: 2300982
Vorab online veröffentlicht am 11.06.2023
Schlagwörter all solid-state batteries, cesium tin chloride, chloride-ion conduction, halide solid electrolytes, ion transport in halide perovskites, solid-state 35Cl NMR
Nachgewiesen in Dimensions
Web of Science
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