La0.99Co0.4Ni0.6O3−δ–Ce0.8Gd0.2O1.95 as composite cathode for solid oxide fuel cells
Publication: Research - peer-review › Conference article – Annual report year: 2011
We have studied a new composite SOFC cathode consisting of LaCo0.4Ni0.6O3−δ (LCN60) and Ce0.9Gd0.1O1.95 (CGO). The polarisation resistance (RP) at 750°C and OCV was measured to 0.05±0.01Ωcm2 and the activation energy was determined to be about 1eV. The impedance spectra were modelled with an EQC model consisting of a high frequency ZRQ circuit and a medium frequency Gerischer impedance, ZG. The resistance of ZG was found to decrease with approximately a factor of two as a consequence of infiltration of (La0.6Sr0.4)0.99CoO3 into the porous LCN60–CGO structure. RP of both infiltrated and non-infiltrated LCN60–CGO cathodes is substantially lower than that of LSM–YSZ and comparable with single phase LSC cathodes at low T due to its low EA. RP was also found to be stable at 750°C and OCV. The cathodes were integrated onto ScYSZ based anode supported cells which were measured to have an ASR of 0.16–0.18Ωcm2 at 750°C.
| Original language | English |
|---|---|
| Journal | Journal of Power Sources |
| Publication date | 2011 |
| Volume | 196 |
| Journal number | 17 |
| Pages | 7237-7244 |
| ISSN | 0378-7753 |
| DOIs | |
| State | Published |
Conference
| Conference | 1st European Solid Oxide Fuel Cell Forum |
|---|---|
| Country | Switzerland |
| City | Lucerne |
| Period | 02-10-94 → 06-10-94 |
| Citations | Web of Science® Times Cited: 3 |
|---|
Keywords
- Solid Oxide Fuel Cells
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