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On the Surface Modification of LLZTO with LiF via a Gas-Phase Approach and the Characterization of the Interfaces of LiF with LLZTO as Well as PEO+LiTFSI

Donzelli, Manuel ; Ferber, Thimo ; Vanita, Vanita ; Waidha, Aamir Iqbal ; Müller, Philipp ; Mellin, Maximilian ; Hausbrand, René ; Jaegermann, Wolfram ; Clemens, Oliver (2022)
On the Surface Modification of LLZTO with LiF via a Gas-Phase Approach and the Characterization of the Interfaces of LiF with LLZTO as Well as PEO+LiTFSI.
In: Materials, 2022, 15 (19)
doi: 10.26083/tuprints-00022839
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: On the Surface Modification of LLZTO with LiF via a Gas-Phase Approach and the Characterization of the Interfaces of LiF with LLZTO as Well as PEO+LiTFSI
Language: English
Date: 7 November 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Materials
Volume of the journal: 15
Issue Number: 19
Collation: 16 Seiten
DOI: 10.26083/tuprints-00022839
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

In this study we present gas-phase fluorination as a method to create a thin LiF layer on Li₆.₅La₃Zr₁.₅Ta₀.₅O₁₂ (LLZTO). We compared these fluorinated films with LiF films produced by RF-magnetron sputtering, where we investigated the interface between the LLZTO and the deposited LiF showing no formation of a reaction layer. Furthermore, we investigated the ability of this LiF layer as a protection layer against Li₂CO₃ formation in ambient air. By this, we show that Li₂CO₃ formation is absent at the LLZTO surface after 24 h in ambient air, supporting the protective character of the formed LiF films, and hence potentially enhancing the handling of LLZTO in air for battery production. With respect to the use within hybrid electrolytes consisting of LLZTO and a mixture of polyethylene oxide (PEO) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), we also investigated the interface between the formed LiF films and a mixture of PEO+LiTFSI by X-ray photoelectron spectroscopy (XPS), showing decomposition of the LiTFSI at the interface.

Uncontrolled Keywords: LLZTO, surface modification, interface stability, fluorination, XPS
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-228397
Additional Information:

This article belongs to the Special Issue Development of Novel Electrode and Electrolyte Materials for Lithium and Sodium Ion Batteries

Classification DDC: 500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
11 Department of Materials and Earth Sciences > Material Science > Surface Science
Date Deposited: 07 Nov 2022 12:23
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22839
PPN: 501633561
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