Journal Article

FZJ-2024-02786

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Grain Boundary Characterization and Potential Percolation of the Solid Electrolyte LLZO

Fu, S. ; Arinicheva, Y. ; Hüter, C. ; Finsterbusch, M.FZJ* ; Spatschek, R. (Corresponding author)FZJ*

2023
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/batteries9040222  doi:10.34734/FZJ-2024-02786

Abstract: The influence of different processing routes and grain size distributions on the character of the grain boundaries in Li7La3Zr2O12 (LLZO) and the potential influence on failure through formation of percolating lithium metal networks in the solid electrolyte are investigated. Therefore, high quality hot-pressed Li7La3Zr2O12 pellets are synthesised with two different grain size distributions. Based on the electron backscatter diffraction measurements, the grain boundary network including the grain boundary distribution and its connectivity via triple junctions are analysed concerning potential Li plating along certain susceptible grain boundary clusters in the hot-pressed LLZO pellets. Additionally, the study investigates the possibility to interpret short-circuiting caused by Li metal plating or penetration in all-solid-state batteries through percolation mechanisms in the solid electrolyte microstructure, in analogy to grain boundary failure processes in metallic systems.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)
2. Werkstoffstruktur und -eigenschaften (IEK-2)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)
2. 1222 - Components and Cells (POF4-122) (POF4-122)
3. DFG project 491111487 - Open-Access-Publikationskosten / 2022 - 2024 / Forschungszentrum Jülich (OAPKFZJ) (491111487) (491111487)

Appears in the scientific report 2024

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Database coverage:
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