Journal Article

FZJ-2021-04213

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The role of NaSICON surface chemistry in stabilizing fast-charging Na metal solid-state batteries

Quérel, E. (Corresponding author) ; Seymour, I. D. ; Cavallaro, A. ; Ma, Q. (Corresponding author)FZJ* ; Tietz, F.FZJ* ; Aguadero, A.

2021
IOP Publishing Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/29087  doi:10.1088/2515-7655/ac2fb3

Abstract: Solid-state batteries (SSBs) with alkali metal anodes hold great promise as energetically dense andsafe alternatives to conventional Li-ion cells. Whilst, in principle, SSBs have the additionaladvantage of offering virtually unlimited plating current densities, fast charges have so far onlybeen achieved through sophisticated interface engineering strategies. With a combination ofsurface sensitive analysis, we reveal that such sophisticated engineering is not necessary inNaSICON solid electrolytes (Na3.4Zr2Si2.4P0.6O12) since optimised performances can be achievedby simple thermal treatments that allow the thermodynamic stabilization of a nanometric Na3PO4protective surface layer. The optimized surface chemistry leads to stabilized Na|NZSP interfaceswith exceptionally low interface resistances (down to 0.1 Ωcm2 at room temperature) and hightolerance to large plating current densities (up to 10 mA cm−2) even for extended cycling periodsof 30 min (corresponding to an areal capacity 5 mAh cm−2). The created Na|NZSP interfaces showgreat stability with increment of only up to 5 Ωcm2 after four months of cell assembly.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 1223 - Batteries in Application (POF4-122) (POF4-122)

Appears in the scientific report 2021

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