TY  - JOUR
AU  - Zeng, Yuan
AU  - Kindelmann, Moritz
AU  - Kwati, Leonard
AU  - Laura, Schaefer
AU  - Yao, Kai
AU  - Malzbender, Jürgen
AU  - Müller, Michael
AU  - Guillon, Olivier
AU  - Ivanova, Mariya
AU  - Menzler, Norbert H.
TI  - Characterization of high Zr/Ce ratio Ba(Zr,Ce,Y)O3−δ proton conductors: investigating the impact of Y on the properties of materials
JO  - Physical chemistry, chemical physics
VL  - 27
SN  - 1463-9076
CY  - Cambridge
PB  - RSC Publ.
M1  - FZJ-2025-00037
SP  - 885-896
PY  - 2025
AB  - Acceptor-substituted Ba(Zr,Ce)O3 proton conducting oxides have attracted significant attention due to their excellent proton conductivity at intermediate temperatures (400–600 °C). A high Zr/Ce ratio is crucial for maintaining stability in humid or other harsh atmospheres. Herein, a systematic study was conducted on the phase composition, microstructure, and the resulting hydration ability and electrochemical performance of high Zr/Ce ratio Ba(Zr,Ce)O3 solid solutions with different Y substitution levels (10 at% to 30 at%). In this substitution range, no apparent secondary phase can be found from XRD, leading to a continuous increase in hydration content. A Y-rich phase was observed in SEM for compositions with high levels of Y substitution. The impact of Y on proton conduction was examined using EIS, with particular attention on elucidating the effects of varying amounts of Y on bulk proton conduction. The increase of proton conductivity was primarily due to the increased charge carrier (proton) concentration caused by Y substitution. Different concentrations of Y have little effect on proton mobility, indicating a compromise between different mechanisms such as the Y trapping effect and the nano-percolation effect. Grain boundary proton conduction was discussed combining the TEM-EDS results to explain the space charge layer effect. Mechanical properties and thermo-chemical stability were also considered to pave the way for real applications.
LB  - PUB:(DE-HGF)16
C6  - 39661081
UR  - <Go to ISI:>//WOS:001374199200001
DO  - DOI:10.1039/D4CP04384G
UR  - https://juser.fz-juelich.de/record/1034923
ER  -