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Interfaces in solid-state sodium-ion batteries: NaCoO 2 thin films on solid electrolyte substrates

Guhl, Conrad and Kehne, Philipp and Ma, Qianli and Tietz, Frank and Komissinskiy, Philipp and Jaegermann, Wolfram and Hausbrand, René (2018):
Interfaces in solid-state sodium-ion batteries: NaCoO 2 thin films on solid electrolyte substrates.
In: Electrochimica Acta, Elsevier Science Publishing, pp. 226-233, 268, ISSN 00134686,
DOI: 10.1016/j.electacta.2018.02.109,
[Online-Edition: https://doi.org/10.1016/j.electacta.2018.02.109],
[Article]

Abstract

On the way to sodium-based all-solid-state batteries, interface analysis is a key issue. In this work, the interface between two typical solid sodium-ion conductors (Na-β″-Al2O3 and NASICON) and the layered oxide material NaCoO2 is investigated. The formation of the interface between the electrolyte material and the NaCoO2 coating is studied using an in-situ X-ray photoemission spectroscopy (XPS) surface science approach. Only a slight reduction of zirconium and scandium in NASICON was observed in proximity to the cathode side interface, while severe reactions, including the formation of a CaOAl2O3 mixed phase, were detected between Na-β″-Al2O3 and NaCoO2.

Item Type: Article
Erschienen: 2018
Creators: Guhl, Conrad and Kehne, Philipp and Ma, Qianli and Tietz, Frank and Komissinskiy, Philipp and Jaegermann, Wolfram and Hausbrand, René
Title: Interfaces in solid-state sodium-ion batteries: NaCoO 2 thin films on solid electrolyte substrates
Language: English
Abstract:

On the way to sodium-based all-solid-state batteries, interface analysis is a key issue. In this work, the interface between two typical solid sodium-ion conductors (Na-β″-Al2O3 and NASICON) and the layered oxide material NaCoO2 is investigated. The formation of the interface between the electrolyte material and the NaCoO2 coating is studied using an in-situ X-ray photoemission spectroscopy (XPS) surface science approach. Only a slight reduction of zirconium and scandium in NASICON was observed in proximity to the cathode side interface, while severe reactions, including the formation of a CaOAl2O3 mixed phase, were detected between Na-β″-Al2O3 and NaCoO2.

Journal or Publication Title: Electrochimica Acta
Volume: 268
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: All-solid-state battery, Interfaces, Sodium, NaCoO2, NASICON, β″-Al2O3
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 > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Surface Science
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
Date Deposited: 05 Apr 2018 11:54
DOI: 10.1016/j.electacta.2018.02.109
Official URL: https://doi.org/10.1016/j.electacta.2018.02.109
Funders: This research project was funded by the DFG (HA 6128/2-1 and KO 4093/2-1)., Additionally, the authors would like to thank BMBF (03KP801) for funding the UHV system DAISY-BAT.
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