Initiation and Performance of a Coating for Countering Chromium Poisoning in a SOFC-stack

Karsten Agersted Nielsen; Åsa Helen Persson; Dustin Beeaff; Jens Valdemar Thorvald Høgh; Lars Mikkelsen; Peter Vang Hendriksen

doi:10.1149/1.2729329

Initiation and Performance of a Coating for Countering Chromium Poisoning in a SOFC-stack

Karsten Agersted Nielsen, Åsa Helen Persson, Dustin Beeaff, Jens Valdemar Thorvald Høgh, Lars Mikkelsen, Peter Vang Hendriksen

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Abstract

Minimising transport of chromium from the metallic interconnect (e.g. of Crofer 22APU) to the cathode in a planar solid oxide fuel cell is done by application of a coating between the two parts. The coating is applied by slurry coating, and taken through stack initialisation it transforms into a stable and densely grown barrier layer, which minimises both the evaporation of chromium from the interconnect surface and the electrical contact resistance between the interconnect and the cathode. Between comparable stack element tests with and without coatings at 750 degrees C, the degradation rate in terms of power density decreased from 6.5% per 1000h to very low levels (

Original language	English
Journal	E C S Transactions
Volume	7
Issue number	1
Pages (from-to)	2145-2154
ISSN	1938-5862
DOIs	https://doi.org/10.1149/1.2729329
Publication status	Published - 2007
Event	10th International symposium on solid oxide fuel cells - Nara New Public Hall, Nara, Japan Duration: 3 Jun 2007 → 8 Jun 2007 Conference number: 10

Conference

Conference	10th International symposium on solid oxide fuel cells
Number	10
Location	Nara New Public Hall
Country/Territory	Japan
City	Nara
Period	03/06/2007 → 08/06/2007

Bibliographical note

Copyright The Electrochemical Society, Inc. [2007]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

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abstract = "Minimising transport of chromium from the metallic interconnect (e.g. of Crofer 22APU) to the cathode in a planar solid oxide fuel cell is done by application of a coating between the two parts. The coating is applied by slurry coating, and taken through stack initialisation it transforms into a stable and densely grown barrier layer, which minimises both the evaporation of chromium from the interconnect surface and the electrical contact resistance between the interconnect and the cathode. Between comparable stack element tests with and without coatings at 750 degrees C, the degradation rate in terms of power density decreased from 6.5% per 1000h to very low levels (",

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AU - Mikkelsen, Lars

AU - Hendriksen, Peter Vang

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Initiation and Performance of a Coating for Countering Chromium Poisoning in a SOFC-stack

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