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
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La0.99Co0.4Ni0.6O3−δ–Ce0.8Gd0.2O1.95 as composite cathode for solid oxide fuel cells. / Hjalmarsson, Per; Mogensen, Mogens Bjerg.
In: Journal of Power Sources, Vol. 196, No. 17, 2011, p. 7237-7244.Publication: Research - peer-review › Conference article – Annual report year: 2011
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TY - CONF
T1 - La0.99Co0.4Ni0.6O3−δ–Ce0.8Gd0.2O1.95 as composite cathode for solid oxide fuel cells
A1 - Hjalmarsson,Per
A1 - Mogensen,Mogens Bjerg
AU - Hjalmarsson,Per
AU - Mogensen,Mogens Bjerg
PB - Elsevier S.A.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Solid Oxide Fuel Cells
U2 - 10.1016/j.jpowsour.2010.11.065
DO - 10.1016/j.jpowsour.2010.11.065
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 17
VL - 196
SP - 7237
EP - 7244
ER -