The Effect of Humidity and Oxygen Partial Pressure on LSM–YSZ Cathode
Publication: Research - peer-review › Journal article – Annual report year: 2011
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The Effect of Humidity and Oxygen Partial Pressure on LSM–YSZ Cathode. / Knöfel, Christina; Chen, Ming; Mogensen, Mogens Bjerg.
In: Fuel Cells, Vol. 11, No. 5, 2011, p. 669-677.Publication: Research - peer-review › Journal article – Annual report year: 2011
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TY - JOUR
T1 - The Effect of Humidity and Oxygen Partial Pressure on LSM–YSZ Cathode
A1 - Knöfel,Christina
A1 - Chen,Ming
A1 - Mogensen,Mogens Bjerg
AU - Knöfel,Christina
AU - Chen,Ming
AU - Mogensen,Mogens Bjerg
PB - Wiley - V C H Verlag GmbH & Co. KGaA
PY - 2011
Y1 - 2011
N2 - Two series of anode supported solid oxide fuel cells (SOFC) were prepared, one with a composite cathode layer of lanthanum strontium manganite (LSM) and yttria stabilized zirconia (YSZ) on top and the other further has a LSM current collector layer on top. The fuel cells were heat treated at 1,000 °C in air or nitrogen choosing dry or humid (70% steam) conditions. XRD, SEM, and XPS investigations were performed on the various samples. The most severe modifications were observed in humid nitrogen atmosphere at low oxygen partial pressure. LSM surface change goes along with a decrease of manganese concentration and strontium enrichment on the surface of the materials. Formation of monoclinic zirconia and zirconate phases was also observed. These results give a closer insight into possible degradation mechanisms of SOFC composite cathode materials in dependence of humidity and oxygen partial pressure.
AB - Two series of anode supported solid oxide fuel cells (SOFC) were prepared, one with a composite cathode layer of lanthanum strontium manganite (LSM) and yttria stabilized zirconia (YSZ) on top and the other further has a LSM current collector layer on top. The fuel cells were heat treated at 1,000 °C in air or nitrogen choosing dry or humid (70% steam) conditions. XRD, SEM, and XPS investigations were performed on the various samples. The most severe modifications were observed in humid nitrogen atmosphere at low oxygen partial pressure. LSM surface change goes along with a decrease of manganese concentration and strontium enrichment on the surface of the materials. Formation of monoclinic zirconia and zirconate phases was also observed. These results give a closer insight into possible degradation mechanisms of SOFC composite cathode materials in dependence of humidity and oxygen partial pressure.
KW - Solid Oxide Fuel Cells
U2 - 10.1002/fuce.201100021
DO - 10.1002/fuce.201100021
JO - Fuel Cells
JF - Fuel Cells
SN - 1615-6846
IS - 5
VL - 11
SP - 669
EP - 677
ER -