Oxidation behavior of (Co,Mn)3O4 coatings on preoxidized stainless steel for solid oxide fuel cell interconnects

Hoyt, Kathryn; Gannon, Paul; White, Preston; Tortop, Rukiye; Ellingwood, Brian; Khoshuei, Hamed

doi:10.1016/j.ijhydene.2011.09.028

Cited by 38 publications

(9 citation statements)

References 23 publications

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“…Additional complications in comparing these values are attributed to the fact that only very few publications include activation energies for the electron conduction process. Some publications even report on a decreasing ASR evolution over time, which is contradictory to the fact of a growing oxide scale [23,30,31]. One might suspect the extreme Fig.…”

Section: Asr Characterizationmentioning

confidence: 94%

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Coated stainless steel 441 as interconnect material for solid oxide fuel cells: Evolution of electrical properties

Grolig

Froitzheim

Svensson

2015

Journal of Power Sources

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h i g h l i g h t sWe exposed cerium/cobalt coated AISI 441 in a SOFC cathode side atmosphere. We tested two different methods of ASR measurement. In-situ measured samples were heavily affected by platinum electrodes. ASR values of ex-situ measured samples could be related to oxidation. The oxidation and chromium volatilization were monitored. a b s t r a c t AISI 441 coated with a double layer coating of 10 nm cerium (inner layer) and 630 nm cobalt was investigated and in addition the uncoated material was exposed for comparison. The main purpose of this investigation was the development of a suitable ASR characterization method. The material was exposed to a simulated cathode atmosphere of air with 3% water at 850 C and the samples were exposed for up to 1500 h. We compared two methods of ASR measurements, an in-situ method where samples were measured with platinum electrodes for longer exposure times and an ex-situ method where preoxidized samples were measured for only very short measurement times. It was found that the ASR of ex-situ characterized samples could be linked to the mass gain and the electrical properties could be linked to the evolving microstructure during the different stages of exposure. Both the degradation of the electric performance and the oxygen uptake (mass gain) followed similar trends. After about 1500 h of exposure an ASR value of about 15 mUcm 2 was reached. The in-situ measured samples suffered from severe corrosion attack during measurement. After only 500 h of exposure already a value of 35 mUcm 2 was obtained.

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Section: Asr Characterizationmentioning

confidence: 94%

“…Most researchers report values in the range of 5e25 mU cm 2 after similar exposure times and temperatures [9,29,30]. Additional complications in comparing these values are attributed to the fact that only very few publications include activation energies for the electron conduction process.…”

Section: Asr Characterizationmentioning

confidence: 99%

Coated stainless steel 441 as interconnect material for solid oxide fuel cells: Evolution of electrical properties

Grolig

Froitzheim

Svensson

2015

Journal of Power Sources

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“…As observed in other studies preoxidation of interconnect may reduce Cr and Fe transport into the contact coating, after long oxidation times. Also importantly, preoxidized samples developed thin coating which may decrease interfacial stress over time between the contact layer and interconnect [22]. The deposition of the contact materials was carried out using wet colloidal spray deposition technique, as was described in Ref.…”

Section: Methodsmentioning

confidence: 99%

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

Morán-Ruiz

Vidal

Laguna‐Bercero

et al. 2014

Journal of Power Sources

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Three lanthanum-based perovskite ceramic compounds as contact materials, (La 0.8 Sr 0.2) 0.95 Fe 0.6 Mn 0.3 Co 0.1 O 3 (LSFMC), LaNi 0.6 Fe 0.4 O 3- (LNF) and LaNi 0.6 Co 0.4 O 3- (LNC), were coated on Crofer22APU interconnect and then, La 0.6 Sr 0.4 FeO 3 (LSF) cathode was deposited on each of contact layers, using in both contact coating is applied between Crofer22APU and LSF cathode without compromising the contact resistance of the system.

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“…As starting point, the metallic substrates were oxidized at 800 ºC for 100 h. This preoxidation of the steel may reduce Cr and Fe transport into the contact coating after long oxidation times [48]. A composite contact material without sintering was directly adhered to preoxidized channeled Crofer22APU interconnect.…”

Section: Characterization Of Composite Contact Materials With Channelementioning

confidence: 99%

LaNi0.6Co0 4O3− dip-coated on Fe–Cr mesh as a composite cathode contact material on intermediate solid oxide fuel cells

Morán-Ruiz

Vidal

Larrañaga

et al. 2014

Journal of Power Sources

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Oxidation behavior of (Co,Mn)3O4 coatings on preoxidized stainless steel for solid oxide fuel cell interconnects

Cited by 38 publications

References 23 publications

Coated stainless steel 441 as interconnect material for solid oxide fuel cells: Evolution of electrical properties

Coated stainless steel 441 as interconnect material for solid oxide fuel cells: Evolution of electrical properties

Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells

LaNi0.6Co0 4O3− dip-coated on Fe–Cr mesh as a composite cathode contact material on intermediate solid oxide fuel cells

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