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Comparison of Ce/Co and Ce/FeNi coatings for interconnects in solid oxide electrolysis.

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Title: Comparison of Ce/Co and Ce/FeNi coatings for interconnects in solid oxide electrolysis.
Authors: Reddy, Mareddy Jayanth1 (AUTHOR), Goebel, Claudia2 (AUTHOR), Valot, Anabelle3 (AUTHOR), Kiebach, Ragnar2 (AUTHOR), Svensson, Jan-Erik1 (AUTHOR), Frandsen, Henrik Lund2 (AUTHOR), Froitzheim, Jan1 (AUTHOR) jan.froitzheim@chalmers.se
Source: International Journal of Hydrogen Energy. Jan2026, Vol. 203, pN.PAG-N.PAG. 1p.
Subjects: Oxidation kinetics, Surface coatings, Surface resistance, Interfaces (Physical sciences), Solid oxide fuel cell electrodes
Abstract: Manganese Cobalt oxide (MCO) coatings have been extensively studied for interconnect applications in solid oxide fuel cells (SOFC). Nevertheless, Co is a critical raw material and efforts are taken to replace it. Ce/FeNi coatings are proposed as an alternative and compared to Ce/Co on AISI 441. Chromium evaporation behaviour, oxidation kinetics, interfacial fracture energy, and area-specific resistance (ASR) of the coating and steels were investigated for up to 3,850 h at 850 °C. Ce/FeNi coatings were not found to be as effective as Ce/Co coatings in preventing chromium evaporation. Nevertheless, Ce/FeNi coated steels showed 50 % lower parabolic rate constant and ASR than Ce/Co coated steel. Additionally, the fracture energy of the adherence of the Ce/FeNi coating to the steel was measured at 750 and 850 °C. The Ce/FeNi coating adherence to the steel greatly outperformed the Ce/Co coating adherence. Furthermore, while the fracture energy of the Ce/Co coating decreases with exposure time, it increases over time for the Ce/FeNi coating. • Ce/FeNi- and Ce/Co-coated AISI 441 were investigated for up to 3,850 h at 850 °C. • Ce/FeNi coated steel exhibits higher Cr(VI) evaporation but a lower oxidation rate. • ASR measurements for Ce/FeNi coated steel were almost 50 % lower than Ce/Co. • Ce/FeNi coated steel had higher fracture toughness than Ce/Co. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 190797910
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Comparison of Ce/Co and Ce/FeNi coatings for interconnects in solid oxide electrolysis.
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  Data: <searchLink fieldCode="AR" term="%22Reddy%2C+Mareddy+Jayanth%22">Reddy, Mareddy Jayanth</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Goebel%2C+Claudia%22">Goebel, Claudia</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Valot%2C+Anabelle%22">Valot, Anabelle</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kiebach%2C+Ragnar%22">Kiebach, Ragnar</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Svensson%2C+Jan-Erik%22">Svensson, Jan-Erik</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Frandsen%2C+Henrik+Lund%22">Frandsen, Henrik Lund</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Froitzheim%2C+Jan%22">Froitzheim, Jan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jan.froitzheim@chalmers.se</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Jan2026, Vol. 203, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Oxidation+kinetics%22">Oxidation kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+resistance%22">Surface resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Interfaces+%28Physical+sciences%29%22">Interfaces (Physical sciences)</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+oxide+fuel+cell+electrodes%22">Solid oxide fuel cell electrodes</searchLink>
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  Data: Manganese Cobalt oxide (MCO) coatings have been extensively studied for interconnect applications in solid oxide fuel cells (SOFC). Nevertheless, Co is a critical raw material and efforts are taken to replace it. Ce/FeNi coatings are proposed as an alternative and compared to Ce/Co on AISI 441. Chromium evaporation behaviour, oxidation kinetics, interfacial fracture energy, and area-specific resistance (ASR) of the coating and steels were investigated for up to 3,850 h at 850 °C. Ce/FeNi coatings were not found to be as effective as Ce/Co coatings in preventing chromium evaporation. Nevertheless, Ce/FeNi coated steels showed 50 % lower parabolic rate constant and ASR than Ce/Co coated steel. Additionally, the fracture energy of the adherence of the Ce/FeNi coating to the steel was measured at 750 and 850 °C. The Ce/FeNi coating adherence to the steel greatly outperformed the Ce/Co coating adherence. Furthermore, while the fracture energy of the Ce/Co coating decreases with exposure time, it increases over time for the Ce/FeNi coating. • Ce/FeNi- and Ce/Co-coated AISI 441 were investigated for up to 3,850 h at 850 °C. • Ce/FeNi coated steel exhibits higher Cr(VI) evaporation but a lower oxidation rate. • ASR measurements for Ce/FeNi coated steel were almost 50 % lower than Ce/Co. • Ce/FeNi coated steel had higher fracture toughness than Ce/Co. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ijhydene.2025.152996
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      – Code: eng
        Text: English
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        StartPage: N.PAG
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      – SubjectFull: Oxidation kinetics
        Type: general
      – SubjectFull: Surface coatings
        Type: general
      – SubjectFull: Surface resistance
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      – SubjectFull: Interfaces (Physical sciences)
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      – SubjectFull: Solid oxide fuel cell electrodes
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      – TitleFull: Comparison of Ce/Co and Ce/FeNi coatings for interconnects in solid oxide electrolysis.
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            NameFull: Reddy, Mareddy Jayanth
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              M: 01
              Text: Jan2026
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              Y: 2026
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