Linking the microstructure, performance and durability of Ni-yttria-stabilized zirconia solid oxide fuel cell anodes using three-dimensional focused ion beam–scanning electron microscopy imaging
| Autor: | J. Scott Cronin, Scott A. Barnett, James R. Wilson |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Metals and Alloys Analytical chemistry Condensed Matter Physics Microstructure Focused ion beam Anode Mechanics of Materials Phase (matter) Electrode General Materials Science Solid oxide fuel cell Composite material Yttria-stabilized zirconia |
| Zdroj: | Scripta Materialia. 65:67-72 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2010.09.025 |
| Popis: | In this work we demonstrate the utility of three-dimensional focused ion beam–scanning electron microscopy nanotomography for understanding composite electrode performance and degradation. Phase connectivity, electrochemically active triple-phase boundary density and phase tortuosity are calculated for a series of anodes with varying Ni-YSZ composition. These structural characteristics, achievable only through three-dimensional interrogation, are shown to play a vital role in determining electrode polarization resistance. Additionally, Ni-YSZ samples are experimentally annealed in hydrogen and reconstructed to quantitatively assess degradation as a function of reduced triple-phase boundary density. |
| Databáze: | OpenAIRE |
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