Home > Publications database > Degradation of a High Performance SOFC Cathode by Cr-Poisoning at OCV-Conditions > print

001     137158
005     20240711085704.0
024 7 _ |a 10.1002/fuce.201200182
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024 7 _ |a 1615-6854
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024 7 _ |a 1615-6846
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024 7 _ |a WOS:000327706700007
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037 _ _ |a FZJ-2013-03627
041 _ _ |a English
082 _ _ |a 620
100 1 _ |a Kornely, M.
|b 0
|e Corresponding author
245 _ _ |a Degradation of a High Performance SOFC Cathode by Cr-Poisoning at OCV-Conditions
260 _ _ |a Weinheim
|c 2013
|b Wiley-VCH
336 7 _ |a Journal Article
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336 7 _ |a article
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520 _ _ |a In this work we investigate the effect of Cr-poisoning at OCV-condition by means of electrochemical impedance spectroscopy (EIS). The anode-supported cell (ASC) is operated in Cr-free environment for the first 70 h of the cell test at 800 °C supplying air to the cathode and a varying mixture of H2O/H2 to the anode. The performance of the cell is determined by current-voltage (CV) measurement after the start up. After an operating time of 70 h in the absence of chromium species a Cr-source was switched on by passing the oxidant (air) through a Crofer22APU powder bed. In order to determine the degradation caused by Cr-poisoning electrical impedance spectra are collected at every 29 h of operating time. After further 275 h at OCV-condition in the presence of Cr-source another CV-curve is measured. A detailed analysis of the measured impedance spectra by the distribution of relaxation times (DRT) enables a separation of the cathode polarization resistance. During the Cr-free operation the cathode polarization shows a constant value. After the Cr-source is switched on a strong increase of the cathode polarization resistance is observed. This unique result shows clearly that Cr-poisoning of an LSM/8YSZ-cathode already takes place at OCV-condition.
536 _ _ |a 123 - Fuel Cells (POF2-123)
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|c POF2-123
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536 _ _ |a SOFC - Solid Oxide Fuel Cell (SOFC-20140602)
|0 G:(DE-Juel1)SOFC-20140602
|c SOFC-20140602
|f SOFC
|x 1
588 _ _ |a Dataset connected to CrossRef, juser.fz-juelich.de
700 1 _ |a Menzler, N. H.
|b 1
700 1 _ |a Weber, A.
|0 P:(DE-HGF)0
|b 2
700 1 _ |a Ivers-Tiffée, E.
|b 3
773 _ _ |a 10.1002/fuce.201200182
|g Vol. 13, no. 4, p. 506 - 510
|0 PERI:(DE-600)2054621-X
|n 4
|p 506 - 510
|t Fuel cells
|v 13
|y 2013
|x 1615-6846
856 4 _ |u https://juser.fz-juelich.de/record/137158/files/FZJ-2013-03627.pdf
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909 C O |o oai:juser.fz-juelich.de:137158
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914 1 _ |y 2013
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