1. Interfaces in solid-state sodium-ion batteries: NaCoO2 thin films on solid electrolyte substrates
- Author
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Qianli Ma, Philipp Kehne, Philipp Komissinskiy, René Hausbrand, Frank Tietz, Wolfram Jaegermann, and Conrad Guhl
- Subjects
Zirconium ,Materials science ,General Chemical Engineering ,Oxide ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Coating ,X-ray photoelectron spectroscopy ,Electrochemistry ,Fast ion conductor ,engineering ,Scandium ,Thin film ,0210 nano-technology - 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 CaO Al2O3 mixed phase, were detected between Na-β″-Al2O3 and NaCoO2.
- Published
- 2018
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