Journal article
Instability and growth of nanoscale Ce0.8Gd0.2O1.9/NiO infiltrate in Sr0.94Ti0.9Nb0.1O3-Zr0.84Y0.16O1.92 anodes for solid oxide fuel cells
Department of Energy Conversion and Storage, Technical University of Denmark1
Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark2
Ceramic Engineering & Science, Department of Energy Conversion and Storage, Technical University of Denmark3
Fundamental Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark4
Microstructural evolution of Ce0.8Gd0.2O 1.9/NiO (CGO/NiO) co-infiltrated nanoparticles in Sr 0.94Ti0.9Nb0.1O3-Zr 0.84Y0.16O1.92 (STN94-YSZ) anodes for solid oxide fuel cells (SOFCs) is investigated during electrochemical testing in a symmetric cell setup. The CGO/NiO infiltrated symmetric cells were subjected to varying atmospheres of H2O/H2 between 650 and 850 C and characterized by electrochemical impedance spectroscopy.
Analytical high resolution transmission electron microscopy showed that the CGO/NiO infiltrate was found to coalesce and grow from an indistinguishable CGO/NiO fluorite structure of an average diameter of 5 nm to individual well-connected, but phase-separated, CGO and Ni particles of 50 nm in average.
This study confirms that instability and growth of CGO/NiO infiltrates in STN-based SOFC electrodes affect the morphology and can potentially be linked to reported losses in electrochemical performance. © 2014 Elsevier B.V. All rights reserved.
| Language: | English |
|---|---|
| Year: | 2014 |
| Pages: | 297-304 |
| ISSN: | 18732755 and 03787753 |
| Types: | Journal article |
| DOI: | 10.1016/j.jpowsour.2014.02.051 |
| ORCIDs: | 0000-0002-6414-7015 , Kuhn, Luise Theil , Jørgensen, Peter Stanley , Sudireddy, Bhaskar Reddy , Bentzen, Janet Jonna , Veltzé, Sune and Ramos, Tania |
