Oxidation in ceria infiltrated metal supported SOFCs – A TEM investigation

Ruth Knibbe; Hsiang-Jen Wang; Peter Blennow Tullmar; Karl Tor Sune Thydén; Åsa Helen Persson; Lars Mikkelsen; Trine Klemensø

doi:10.1016/j.jpowsour.2012.11.051

Oxidation in ceria infiltrated metal supported SOFCs – A TEM investigation

Ruth Knibbe
, Hsiang-Jen Wang
, Peter Blennow Tullmar
, Karl Tor Sune Thydén
, Åsa Helen Persson
, Lars Mikkelsen
, Trine Klemensø

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The oxidation resistance of the Fe–Cr alloy backbone structure of metal supported solid oxide fuel cells is significantly improved when infiltrated with gadolinium doped ceria (CGO) particles. The mechanism for the improved oxidation behaviour is elucidated using various analytical transmission electron microscopy (TEM) techniques including energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy of focus ion beamed TEM samples. The infiltrated CGO is predominately converted into CeFeO3 after high temperature processing, protecting the alloy. A thin layer of Cr-oxide is observed to be sandwiched between the CeFeO3/CGO layers and the Fe–Cr alloy particles. Despite the improved oxidation resistance at open circuit voltage, during fuel cell testing accelerated oxidation is observed at the triple phase boundaries.

Original language	English
Journal	Journal of Power Sources
Volume	228
Pages (from-to)	75-82
ISSN	0378-7753
DOIs	https://doi.org/10.1016/j.jpowsour.2012.11.051
Publication status	Published - 2013

Keywords

Analytical transmission electron microscopy
Metal supported solid oxide fuel cells
Fuel cell durability
CeFeO3
Ceria

Access to Document

10.1016/j.jpowsour.2012.11.051

OpenUrl availability

Full text

Cite this

@article{79570de1eeb64cd5ae7100348caeaad6,

title = "Oxidation in ceria infiltrated metal supported SOFCs – A TEM investigation",

abstract = "The oxidation resistance of the Fe–Cr alloy backbone structure of metal supported solid oxide fuel cells is significantly improved when infiltrated with gadolinium doped ceria (CGO) particles. The mechanism for the improved oxidation behaviour is elucidated using various analytical transmission electron microscopy (TEM) techniques including energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy of focus ion beamed TEM samples. The infiltrated CGO is predominately converted into CeFeO3 after high temperature processing, protecting the alloy. A thin layer of Cr-oxide is observed to be sandwiched between the CeFeO3/CGO layers and the Fe–Cr alloy particles. Despite the improved oxidation resistance at open circuit voltage, during fuel cell testing accelerated oxidation is observed at the triple phase boundaries.",

keywords = "Analytical transmission electron microscopy, Metal supported solid oxide fuel cells, Fuel cell durability, CeFeO3, Ceria",

author = "Ruth Knibbe and Hsiang-Jen Wang and \{Blennow Tullmar\}, Peter and Thyd{\'e}n, \{Karl Tor Sune\} and Persson, \{{\AA}sa Helen\} and Lars Mikkelsen and Trine Klemens{\o}",

year = "2013",

doi = "10.1016/j.jpowsour.2012.11.051",

language = "English",

volume = "228",

pages = "75--82",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier",

}

TY - JOUR

T1 - Oxidation in ceria infiltrated metal supported SOFCs – A TEM investigation

AU - Knibbe, Ruth

AU - Wang, Hsiang-Jen

AU - Blennow Tullmar, Peter

AU - Thydén, Karl Tor Sune

AU - Persson, Åsa Helen

AU - Mikkelsen, Lars

AU - Klemensø, Trine

PY - 2013

Y1 - 2013

N2 - The oxidation resistance of the Fe–Cr alloy backbone structure of metal supported solid oxide fuel cells is significantly improved when infiltrated with gadolinium doped ceria (CGO) particles. The mechanism for the improved oxidation behaviour is elucidated using various analytical transmission electron microscopy (TEM) techniques including energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy of focus ion beamed TEM samples. The infiltrated CGO is predominately converted into CeFeO3 after high temperature processing, protecting the alloy. A thin layer of Cr-oxide is observed to be sandwiched between the CeFeO3/CGO layers and the Fe–Cr alloy particles. Despite the improved oxidation resistance at open circuit voltage, during fuel cell testing accelerated oxidation is observed at the triple phase boundaries.

AB - The oxidation resistance of the Fe–Cr alloy backbone structure of metal supported solid oxide fuel cells is significantly improved when infiltrated with gadolinium doped ceria (CGO) particles. The mechanism for the improved oxidation behaviour is elucidated using various analytical transmission electron microscopy (TEM) techniques including energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy of focus ion beamed TEM samples. The infiltrated CGO is predominately converted into CeFeO3 after high temperature processing, protecting the alloy. A thin layer of Cr-oxide is observed to be sandwiched between the CeFeO3/CGO layers and the Fe–Cr alloy particles. Despite the improved oxidation resistance at open circuit voltage, during fuel cell testing accelerated oxidation is observed at the triple phase boundaries.

KW - Analytical transmission electron microscopy

KW - Metal supported solid oxide fuel cells

KW - Fuel cell durability

KW - CeFeO3

KW - Ceria

U2 - 10.1016/j.jpowsour.2012.11.051

DO - 10.1016/j.jpowsour.2012.11.051

M3 - Journal article

SN - 0378-7753

VL - 228

SP - 75

EP - 82

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Oxidation in ceria infiltrated metal supported SOFCs – A TEM investigation

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this