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Sozak, Mutlucan ; Wiedemann, Kim Bennet ; Sasikumar, Ganga ; Kalyk, Fariza ; Vargas-Barbosa, Nella M. ; Bianchini, Matteo ; Moos, Ralf:
Improving critical current density and cycling stability of NaSICON solid electrolytes by powder aerosol deposited CuO interlayers.
In: Journal of Power Sources.
Bd. 688
(2026)
.
- 240631.
ISSN 0378-7753
DOI: https://doi.org/10.1016/j.jpowsour.2026.240631
Volltext
Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID Pulveraerosolbasierte Kaltabscheidung (PAD) zur Erzeugung dünner ionenleitfähiger NaSICON-Schichten im µm-Bereich für hochleistungsfähige Natrium-Feststoffbatterien 508497297 |
|---|---|
| Projektfinanzierung: |
Deutsche Forschungsgemeinschaft |
Abstract
Solid-solid interfacial instabilities remain major obstacles for the industrialization of cost-effective, high energy density solid-state sodium batteries (SSSB). In this work, a conversion-type CuO interlayer was successfully deposited onto both sides of Na3Zr2Si2PO12 (NZSP) solid electrolyte (SE) discs by powder aerosol deposition (PAD) to enhance the interfacial compatibility between sodium metal and SE. While unmodified symmetric cells suffer from progressive interfacial degradation, and limited critical current density, incorporating PAD-CuO interlayers on NZSP SE discs significantly reduces interfacial resistance and increases the critical current density up to 5.0 mA cm−2. This value is further increased to 7.4 mA cm−2 by thermal post-treatment. Long-term galvanostatic cycling demonstrates stabilized overvoltages during plating/stripping experiments, indicating progressive interphase activation and improved Na+ transport. Overall, these results demonstrate that PAD enables the fabrication of functional interlayers for stabilizing the Na\textbarNZSP interface and may provide a foundation for fully PAD-processed scalable architectures in next-generation SSSBs.