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 languageEnglish
    JournalE C S Transactions
    Volume7
    Issue number1
    Pages (from-to)2145-2154
    ISSN1938-5862
    DOIs
    Publication statusPublished - 2007
    Event10th International symposium on solid oxide fuel cells - Nara New Public Hall, Nara, Japan
    Duration: 3 Jun 20078 Jun 2007
    Conference number: 10

    Conference

    Conference10th International symposium on solid oxide fuel cells
    Number10
    LocationNara New Public Hall
    Country/TerritoryJapan
    CityNara
    Period03/06/200708/06/2007

    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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