Journal Article

FZJ-2025-02156

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png LiI-Modified Glass-Ceramic Lithium Thioborate: From Fundamentals to Applications in Solid-State Batteries

Holmes, S. E. ; Kondek, J. ; Zhang, P. ; Faka, V. ; Newnham, J. A. ; Gronych, L. M. ; Hansen, M. R. ; Zeier, W.FZJ* ; Cui, Y. (Corresponding author)

2025
American Chemical Society Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.chemmater.5c00224

Abstract: Solid-state batteries are an emerging battery technology rivaling lithium-ion batteries, but before commercialization can occur, new classes of solid-state electrolytes (SSEs) must be investigated to better understand the fundamental properties of these materials and to extend the capabilities of fast charging and cycle life. In this work, we investigate glass-ceramic lithium thioborate (LBS) SSEs with the stoichiometry of $Li_{10}B_{10}S_{20}$ and utilize a rapid synthesis that enables lithium iodide (LiI) modification in $Li_{10}B_{10}S_{20}$. We study the structures of four materials with varying amounts of LiI using X-ray diffraction, pair distribution function, and solid-state NMR and find that LiI breaks down the $B_{10}S_{20}$ supertetrahedra that make up the unit cell of $Li_{10}B_{10}S_{20}$. More LiI increases ionic conductivity by increasing the unit cell volume and the fraction of the glassy phase in the electrolyte. LiI-modified $Li_{10}B_{10}S_{20}$ as an anode-facing SSE enables all-solid-state batteries to cycle well with theoretical capacities up 6.37 $mAh$ $cm^{-2}$ at 0.1C, validating the relevance of LBS SSEs as separators for solid-state batteries.

Note: Supported by funding from the Bundesministerium für Bildung und Forschung (BMBF) for under the FESTBATT cluster of competence (project 03XP0430F)

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IMD-4)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)

Appears in the scientific report 2025

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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