Microstructure degradation of LSM-YSZ cathode in SOFCs operated at various conditions

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

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Microstructure degradation of LSM-YSZ cathode in SOFCs operated at various conditions. / Liu, Yi-Lin; Thydén, Karl Tor Sune; Chen, Ming; Hagen, Anke.

In: Solid State Ionics, Vol. 206, 2012, p. 97-103.

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

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Author

Liu, Yi-Lin; Thydén, Karl Tor Sune; Chen, Ming; Hagen, Anke / Microstructure degradation of LSM-YSZ cathode in SOFCs operated at various conditions.

In: Solid State Ionics, Vol. 206, 2012, p. 97-103.

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

Bibtex

@article{d53fe36bed554a77b6655669cdd70bf4,
title = "Microstructure degradation of LSM-YSZ cathode in SOFCs operated at various conditions",
keywords = "Interface, Solid Oxide Fuel Cells, Degradation, Long-term stability, SEM, LSM-YSZ cathode, Microstructure",
publisher = "Elsevier BV North-Holland",
author = "Yi-Lin Liu and Thydén, {Karl Tor Sune} and Ming Chen and Anke Hagen",
year = "2012",
doi = "10.1016/j.ssi.2011.10.020",
volume = "206",
pages = "97--103",
journal = "Solid State Ionics",
issn = "0167-2738",

}

RIS

TY - JOUR

T1 - Microstructure degradation of LSM-YSZ cathode in SOFCs operated at various conditions

A1 - Liu,Yi-Lin

A1 - Thydén,Karl Tor Sune

A1 - Chen,Ming

A1 - Hagen,Anke

AU - Liu,Yi-Lin

AU - Thydén,Karl Tor Sune

AU - Chen,Ming

AU - Hagen,Anke

PB - Elsevier BV North-Holland

PY - 2012

Y1 - 2012

N2 - Systematic microstructural analyses have been carried out on a series of technological SOFCs that went through long-term cell tests with various operating parameters including temperature, current load and time length under current. For the LSM-YSZ cathode, a number of microstructure degradation mechanisms have been identified. And it has been observed that different mechanisms dominate the degradation process under different test conditions. The severe cathode degradation at 750 °C operation with high current density is attributed to a loss of the cathode/electrolyte interface stability. For the cells tested at 850 °C, the interface stability is maintained due to further sintering during cell operation. A cell test lasting for 2 years (17500 h) at 850 °C with a moderate current density (not greater than 1 A/cm2) has shown that the cathode microstructure is fairly robust to the degradation processes at this temperature, such as grain coarsening and element diffusion. The cell degrades mildly with a cell voltage degradation rate of 7 mV/1000 h.

AB - Systematic microstructural analyses have been carried out on a series of technological SOFCs that went through long-term cell tests with various operating parameters including temperature, current load and time length under current. For the LSM-YSZ cathode, a number of microstructure degradation mechanisms have been identified. And it has been observed that different mechanisms dominate the degradation process under different test conditions. The severe cathode degradation at 750 °C operation with high current density is attributed to a loss of the cathode/electrolyte interface stability. For the cells tested at 850 °C, the interface stability is maintained due to further sintering during cell operation. A cell test lasting for 2 years (17500 h) at 850 °C with a moderate current density (not greater than 1 A/cm2) has shown that the cathode microstructure is fairly robust to the degradation processes at this temperature, such as grain coarsening and element diffusion. The cell degrades mildly with a cell voltage degradation rate of 7 mV/1000 h.

KW - Interface

KW - Solid Oxide Fuel Cells

KW - Degradation

KW - Long-term stability

KW - SEM

KW - LSM-YSZ cathode

KW - Microstructure

U2 - 10.1016/j.ssi.2011.10.020

DO - 10.1016/j.ssi.2011.10.020

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

VL - 206

SP - 97

EP - 103

ER -