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Sc-substituted Nasicon solid electrolyte for an all-solid-state NaxCoO2/Nasicon/Na sodium model battery with stable electrochemical performance

Kehne, P. and Guhl, C. and Ma, Q. and Tietz, F. and Alff, L. and Hausbrand, R. and Komissinskiy, P. (2019):
Sc-substituted Nasicon solid electrolyte for an all-solid-state NaxCoO2/Nasicon/Na sodium model battery with stable electrochemical performance.
In: Journal of Power Sources, ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, pp. 86-93, 409, ISSN 03787753, DOI: 10.1016/j.jpowsour.2018.10.089, [Online-Edition: https://doi.org/10.1016/j.jpowsour.2018.10.089],
[Article]

Abstract

All-solid-state sodium batteries are attractive due to the abundance of sodium and advantageous for safe battery operation by avoiding flammable organics and liquids and suppressed dendrite formation. Currently, the lack of a chemically stable sodium solid electrolyte with high ion conductivity at room temperature is one of the challenges for future development of sodium batteries. Herein, we present a Na CoO2/Nasicon/Na thin-film model sodium solid-state battery using a Sc-substituted Nasicon solid electrolyte with a high ionic conductivity of 4 x 10(-3)S cm(-1). The battery shows a high specific capacity of 150 mAh g(-1) at room-temperature and discharge rates of up to 6C. Excellent chemical stability of this solid electrolyte at high voltages of up to 4.2 V increases the accessible sodium (de)intercalation range and battery capacity. Direct extraction of the interface resistances between the electrode materials of the thin-film model cell using electrochemical impedance spectroscopy gives a unique opportunity of correlation the electrochemical performance with properties of electrode materials and their interfaces.

Item Type: Article
Erschienen: 2019
Creators: Kehne, P. and Guhl, C. and Ma, Q. and Tietz, F. and Alff, L. and Hausbrand, R. and Komissinskiy, P.
Title: Sc-substituted Nasicon solid electrolyte for an all-solid-state NaxCoO2/Nasicon/Na sodium model battery with stable electrochemical performance
Language: English
Abstract:

All-solid-state sodium batteries are attractive due to the abundance of sodium and advantageous for safe battery operation by avoiding flammable organics and liquids and suppressed dendrite formation. Currently, the lack of a chemically stable sodium solid electrolyte with high ion conductivity at room temperature is one of the challenges for future development of sodium batteries. Herein, we present a Na CoO2/Nasicon/Na thin-film model sodium solid-state battery using a Sc-substituted Nasicon solid electrolyte with a high ionic conductivity of 4 x 10(-3)S cm(-1). The battery shows a high specific capacity of 150 mAh g(-1) at room-temperature and discharge rates of up to 6C. Excellent chemical stability of this solid electrolyte at high voltages of up to 4.2 V increases the accessible sodium (de)intercalation range and battery capacity. Direct extraction of the interface resistances between the electrode materials of the thin-film model cell using electrochemical impedance spectroscopy gives a unique opportunity of correlation the electrochemical performance with properties of electrode materials and their interfaces.

Journal or Publication Title: Journal of Power Sources
Volume: 409
Publisher: ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Uncontrolled Keywords: Room-temperature all-solid-state sodium battery, Nasicon, NaxCoO2, Impedance spectroscopy
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
Date Deposited: 17 Jan 2019 08:53
DOI: 10.1016/j.jpowsour.2018.10.089
Official URL: https://doi.org/10.1016/j.jpowsour.2018.10.089
Funders: This work was funded by the Deutsche Forschungsgemeinschaft within HA 6128/2-1 and KO 4093/2-1.
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