Abstract
A nickel point electrode setup was used as a model of an SOFC anode on three slightly different electrolytes of zirconia stabilised by co-doping with scandia and yttria. The effect of electrolyte impurities on the electrode polarisation resistance was investigated by correlating electrochemical impedance spectroscopy data with time-of-flight secondary ion mass spectrometry, scanning electron microscopy and atomic force microscopy data. A semi-quantitative analysis of the electrolyte surfaces showed that the levels of surface impurities inside the electrode/electrolyte interface in close proximity to the three phase boundary have a large effect on the electrode polarisation resistance.
Original language | English |
---|---|
Journal | Solid State Ionics |
Volume | 179 |
Issue number | 39 |
Pages (from-to) | 2290-2298 |
ISSN | 0167-2738 |
DOIs | |
Publication status | Published - 2008 |
Keywords
- Segregation of impurities
- Solid oxide fuel cell
- Ni
- ScYSZ
- ToF-SIMS
- Anode