Effect of cathode gas humidification on performance and durability of Solid Oxide Fuel Cells

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Effect of cathode gas humidification on performance and durability of Solid Oxide Fuel Cells. / Nielsen, Jimmi; Hagen, Anke; Liu, Yi-Lin.

In: Solid State Ionics, Vol. 181, No. 11-12, 2010, p. 517-524.

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Author

Nielsen, Jimmi; Hagen, Anke; Liu, Yi-Lin / Effect of cathode gas humidification on performance and durability of Solid Oxide Fuel Cells.

In: Solid State Ionics, Vol. 181, No. 11-12, 2010, p. 517-524.

Publication: Research - peer-reviewJournal article – Annual report year: 2010

Bibtex

@article{d17b0b700d54413da414cd6dc6ec8d2a,
title = "Effect of cathode gas humidification on performance and durability of Solid Oxide Fuel Cells",
keywords = "Solid Oxide Fuel Cells, Fuel Cells and hydrogen, Brændselsceller og brint",
publisher = "Elsevier BV North-Holland",
author = "Jimmi Nielsen and Anke Hagen and Yi-Lin Liu",
year = "2010",
doi = "10.1016/j.ssi.2010.02.018",
volume = "181",
number = "11-12",
pages = "517--524",
journal = "Solid State Ionics",
issn = "0167-2738",

}

RIS

TY - JOUR

T1 - Effect of cathode gas humidification on performance and durability of Solid Oxide Fuel Cells

A1 - Nielsen,Jimmi

A1 - Hagen,Anke

A1 - Liu,Yi-Lin

AU - Nielsen,Jimmi

AU - Hagen,Anke

AU - Liu,Yi-Lin

PB - Elsevier BV North-Holland

PY - 2010

Y1 - 2010

N2 - The effect of cathode inlet gas humidification was studied on single anode supported Solid Oxide Fuel Cells (SOFC's). The studied cells were Risø 2 G and 2.5 G. The former consists of a LSM:YSZ composite cathode, while the latter consists of a LSCF:CGO composite cathode on a CGO protection layer respectively. A clear effect of humidification was observed for 2 G cells with a fast transient upon humidification followed by an ongoing long term passivation/degradation during humidification. Removal of humidification resulted in a partial regain of the cell voltage prior to humidification. The humidification effect was found to be dependent on both the degree of humidification and the cathode polarization. No significant effect of humidification was found at OCV which rules out the possibility of a traditional poisoning effect with a blocking of active sites. Post-mortem high resolution FEG-SEM analysis showed clear changes at and around the cathode/electrolyte contact area. In contrast to Risø 2 G cells, a very high tolerance towards humidification of cathode gas air was observed for Risø 2.5 G cells with no detectable effect of humidification even when the humidification was as high as 12.8 mol%

AB - The effect of cathode inlet gas humidification was studied on single anode supported Solid Oxide Fuel Cells (SOFC's). The studied cells were Risø 2 G and 2.5 G. The former consists of a LSM:YSZ composite cathode, while the latter consists of a LSCF:CGO composite cathode on a CGO protection layer respectively. A clear effect of humidification was observed for 2 G cells with a fast transient upon humidification followed by an ongoing long term passivation/degradation during humidification. Removal of humidification resulted in a partial regain of the cell voltage prior to humidification. The humidification effect was found to be dependent on both the degree of humidification and the cathode polarization. No significant effect of humidification was found at OCV which rules out the possibility of a traditional poisoning effect with a blocking of active sites. Post-mortem high resolution FEG-SEM analysis showed clear changes at and around the cathode/electrolyte contact area. In contrast to Risø 2 G cells, a very high tolerance towards humidification of cathode gas air was observed for Risø 2.5 G cells with no detectable effect of humidification even when the humidification was as high as 12.8 mol%

KW - Solid Oxide Fuel Cells

KW - Fuel Cells and hydrogen

KW - Brændselsceller og brint

U2 - 10.1016/j.ssi.2010.02.018

DO - 10.1016/j.ssi.2010.02.018

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

IS - 11-12

VL - 181

SP - 517

EP - 524

ER -