Relation Between Ni Particle Shape Change and Ni Migration in Ni–YSZ Electrodes – a Hypothesis
| Autor: | Sune Dalgaard Ebbesen, Mogens Bjerg Mogensen, Youkun Tao, Anne Hauch, Ming Chen, Xiufu Sun, Karin Vels Hansen, Peter Vang Hendriksen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
020209 energy Electrode Composite number Oxide Energy Engineering and Power Technology 02 engineering and technology law.invention chemistry.chemical_compound Degradation law 0202 electrical engineering electronic engineering information engineering Ni/YSZ SOFC Yttria-stabilized zirconia Energy Conversion Electrolysis Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Chemical engineering chemistry Fuel Cell Hydroxide Degradation (geology) Particle SOEC 0210 nano-technology |
| Zdroj: | Mogensen, M B, Hauch, A, Sun, X, Chen, M, Tao, Y, Ebbesen, S D, Hansen, K V & Hendriksen, P V 2017, ' Relation Between Ni Particle Shape Change and Ni Migration in Ni–YSZ Electrodes – a Hypothesis ', Fuel Cells, vol. 17, no. 4, pp. 434-441 . https://doi.org/10.1002/fuce.201600222 |
| Popis: | This paper deals with degradation mechanisms of Ni–YSZ electrodes for solid oxide cells, mainly solid oxide electrolysis cells (SOECs), but also to some extent solid oxide fuel cells (SOFCs). Analysis of literature data reveals that several apparently different and even in one case apparently contradicting degradation phenomena are a consequence of interplay between loss of contact between the Ni–YSZ (and Ni–Ni particles) in the active fine-structured composite fuel electrode layer and migration of Ni via weakly oxidized Ni hydroxide species. A hypothesis that unravels the apparent contradiction and explains qualitatively the phenomena is presented, and as a side effect, light has been shed on a degradation phenomenon in solid oxide fuel cells (SOFCs) that has been observed during a decade. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|