The Effect of Humidity and Oxygen Partial Pressure on LSM–YSZ Cathode

Publication: Research - peer-reviewJournal 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-reviewJournal article – Annual report year: 2011

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Knöfel, Christina; Chen, Ming; Mogensen, Mogens Bjerg / The Effect of Humidity and Oxygen Partial Pressure on LSM–YSZ Cathode.

In: Fuel Cells, Vol. 11, No. 5, 2011, p. 669-677.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{cff5e385b86441f2a5bad95648687167,
title = "The Effect of Humidity and Oxygen Partial Pressure on LSM–YSZ Cathode",
keywords = "Solid Oxide Fuel Cells",
publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
author = "Christina Knöfel and Ming Chen and Mogensen, {Mogens Bjerg}",
year = "2011",
doi = "10.1002/fuce.201100021",
volume = "11",
number = "5",
pages = "669--677",
journal = "Fuel Cells",
issn = "1615-6846",

}

RIS

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 -