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PEO infiltration of porous garnet-type lithium-conducting solid electrolyte thin films

Waidha, Aamir Iqbal ; Vanita, Vanita ; Clemens, Oliver (2021)
PEO infiltration of porous garnet-type lithium-conducting solid electrolyte thin films.
In: Ceramics, 4 (3)
doi: 10.3390/ceramics4030031
Article, Bibliographie

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Abstract

Composite electrolytes containing lithium ion conducting polymer matrix and ceramic filler are promising solid-state electrolytes for all solid-state lithium ion batteries due to their wide electrochemical stability window, high lithium ion conductivity and low electrode/electrolyte interfacial resistance. In this study, we report on the polymer infiltration of porous thin films of aluminum-doped cubic garnet fabricated via a combination of nebulized spray pyrolysis and spin coating with subsequent post annealing at 1173 K. This method offers a simple and easy route for the fabrication of a three-dimensional porous garnet network with a thickness in the range of 50 to 100 µm, which could be used as the ceramic backbone providing a continuous pathway for lithium ion transport in composite electrolytes. The porous microstructure of the fabricated thin films is confirmed via scanning electron microscopy. Ionic conductivity of the pristine films is determined via electrochemical impedance spectroscopy. We show that annealing times have a significant impact on the ionic conductivity of the films. The subsequent polymer infiltration of the porous garnet films shows a maximum ionic conductivity of 5.3 × 10⁻⁷ S cm⁻¹ at 298 K, which is six orders of magnitude higher than the pristine porous garnet film.

Item Type: Article
Erschienen: 2021
Creators: Waidha, Aamir Iqbal ; Vanita, Vanita ; Clemens, Oliver
Type of entry: Bibliographie
Title: PEO infiltration of porous garnet-type lithium-conducting solid electrolyte thin films
Language: English
Date: 2021
Place of Publication: Basel
Publisher: MDPI
Journal or Publication Title: Ceramics
Volume of the journal: 4
Issue Number: 3
DOI: 10.3390/ceramics4030031
Corresponding Links:
Abstract:

Composite electrolytes containing lithium ion conducting polymer matrix and ceramic filler are promising solid-state electrolytes for all solid-state lithium ion batteries due to their wide electrochemical stability window, high lithium ion conductivity and low electrode/electrolyte interfacial resistance. In this study, we report on the polymer infiltration of porous thin films of aluminum-doped cubic garnet fabricated via a combination of nebulized spray pyrolysis and spin coating with subsequent post annealing at 1173 K. This method offers a simple and easy route for the fabrication of a three-dimensional porous garnet network with a thickness in the range of 50 to 100 µm, which could be used as the ceramic backbone providing a continuous pathway for lithium ion transport in composite electrolytes. The porous microstructure of the fabricated thin films is confirmed via scanning electron microscopy. Ionic conductivity of the pristine films is determined via electrochemical impedance spectroscopy. We show that annealing times have a significant impact on the ionic conductivity of the films. The subsequent polymer infiltration of the porous garnet films shows a maximum ionic conductivity of 5.3 × 10⁻⁷ S cm⁻¹ at 298 K, which is six orders of magnitude higher than the pristine porous garnet film.

Uncontrolled Keywords: lithium ion batteries, garnet, thin films, composite electrolyte
Additional Information:

This article belongs to the Special Issue Innovative Processing Routes for Electroactive Materials

Classification DDC: 600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
Date Deposited: 16 Jan 2024 07:34
Last Modified: 16 Jan 2024 07:34
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