000137158 001__ 137158
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000137158 0247_ $$2doi$$a10.1002/fuce.201200182
000137158 0247_ $$2ISSN$$a1615-6854
000137158 0247_ $$2ISSN$$a1615-6846
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000137158 037__ $$aFZJ-2013-03627
000137158 041__ $$aEnglish
000137158 082__ $$a620
000137158 1001_ $$aKornely, M.$$b0$$eCorresponding author
000137158 245__ $$aDegradation of a High Performance SOFC Cathode by Cr-Poisoning at OCV-Conditions
000137158 260__ $$aWeinheim$$bWiley-VCH$$c2013
000137158 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1407998831_32487
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000137158 520__ $$aIn this work we investigate the effect of Cr-poisoning at OCV-condition by means of electrochemical impedance spectroscopy (EIS). The anode-supported cell (ASC) is operated in Cr-free environment for the first 70 h of the cell test at 800 °C supplying air to the cathode and a varying mixture of H2O/H2 to the anode. The performance of the cell is determined by current-voltage (CV) measurement after the start up. After an operating time of 70 h in the absence of chromium species a Cr-source was switched on by passing the oxidant (air) through a Crofer22APU powder bed. In order to determine the degradation caused by Cr-poisoning electrical impedance spectra are collected at every 29 h of operating time. After further 275 h at OCV-condition in the presence of Cr-source another CV-curve is measured. A detailed analysis of the measured impedance spectra by the distribution of relaxation times (DRT) enables a separation of the cathode polarization resistance. During the Cr-free operation the cathode polarization shows a constant value. After the Cr-source is switched on a strong increase of the cathode polarization resistance is observed. This unique result shows clearly that Cr-poisoning of an LSM/8YSZ-cathode already takes place at OCV-condition.
000137158 536__ $$0G:(DE-HGF)POF2-123$$a123 - Fuel Cells (POF2-123)$$cPOF2-123$$fPOF II$$x0
000137158 536__ $$0G:(DE-Juel1)SOFC-20140602$$aSOFC - Solid Oxide Fuel Cell (SOFC-20140602)$$cSOFC-20140602$$fSOFC$$x1
000137158 588__ $$aDataset connected to CrossRef, juser.fz-juelich.de
000137158 7001_ $$aMenzler, N. H.$$b1
000137158 7001_ $$0P:(DE-HGF)0$$aWeber, A.$$b2
000137158 7001_ $$aIvers-Tiffée, E.$$b3
000137158 773__ $$0PERI:(DE-600)2054621-X$$a10.1002/fuce.201200182$$gVol. 13, no. 4, p. 506 - 510$$n4$$p506 - 510$$tFuel cells$$v13$$x1615-6846$$y2013
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000137158 9141_ $$y2013
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