Gast ::
| Hauptseite > Publikationsdatenbank > Tailoring Properties of BaZr0.8-xCe0.2YxO3-δ Proton Conductors for Enhanced Performance in Electrochemical Devices |
| Hauptseite > Publikationsdatenbank > Tailoring Properties of BaZr0.8-xCe0.2YxO3-δ Proton Conductors for Enhanced Performance in Electrochemical Devices |
| Poster (After Call) | FZJ-2023-04562 |
; ; ; ;
2023
Abstract: Solid oxide fuel and electrolysis cells (SOFC/SOEC) based on ceramic proton conductors efficiently convert chemical energy into electricity and vice versa at intermediate operating temperatures (400-600 °C)[1]. Acceptor doped BaCeO3 and BaZrO3, are the most extensively studied proton conductors. BaCeO3 exhibits high proton conductivity but shows lower chemical stability in H2O and CO2 environments. Conversely, BaZrO3 possesses higher chemical stability but lower proton transport ability at the grain boundaries[2]. Preparing Ba(Zr,Ce)O3 solid solutions with the appropriate Zr/Ce ratio at the B-site in the perovskite crystal structure is a compromise strategy. In this work, 20 mol.% of Ce was introduced into the lattice of Y-doped BaZrO3, and 0.5 wt.% of NiO was applied as a sintering aid. The Y2O3 substituent amount varies within the range of 10-30 mol.% in order to study the influence of Y on the phase formation, microstructure, hydration behavior and electrical performance. Y-riched phase has been found in samples with Y content exceeding 25 mol.%. And excessive Y2O3 substitution has a negative impact on the grain boundary conductivity. In addition, mechanical performance and thermo-chemical stability is also taken into consideration to evaluate the suitability of this material for electrochemical devices.
|
The record appears in these collections: |