Tubular Metal Supported SOFC Development for Domestic Power Generation

Villarreal, I.; Rivas, Mikel; Rodrı́guez-Martı́nez, Lide M.; Otaegi, Laida; Zabala, Aingeru; Gómez, Nuria; Alvarez, Mario; Antepara, Íñigo; Arizmendiarrieta, Nagore; Manzanedo, Jaio; Olave, Mireia; Urriolabeitia, Abel; Burgos, N.; Castro, Francisco; Laresgoiti, Ander

doi:10.1149/1.3205583

Cited by 20 publications

(7 citation statements)

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“…Various groups and research institutions have been working on the implementation of MSCs during the past years in order to take advantage of their promising characteristics. [2][3][4][5][6] The MSC design of Plansee SE (Reutte, Austria) was developed in close cooperation with JÜLICH since 2008. [7] Compared to ceramics, the metallic support is more robust in terms of stresses arising from vibrations or thermal cycles.…”

Section: Introductionmentioning

confidence: 99%

Novel processing of La0.58Sr0.4Co0.2Fe0.8O3−δ cathodes for metal-supported fuel cells

et al. 2017

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Metal-supported solid oxide fuel cells (MSCs) have gained high attention as they offer a possibility to utilize solid oxide fuel cells (SOFCs) in mobile applications such as auxiliary power units in heavy duty vehicles. Cathode reliability is one of the main issues of MSC development, since cathodes tend to degrade rapidly after being in-situ activated during onset of the stack operation. In the present study, a novel sintering route for La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathode material was developed. Sintering of the screen printed cathodes was performed before stack operation at 950 °C in reducing Ar atmosphere for 3 h. Under these conditions, severe oxidation of the metallic substrate and the Ni in the anode was avoided reliably. For proof of concept, phase stability and microstructure of the MSC cathodes were characterized. The results reveal that cathode layers sintered in Ar exhibit substantially improved adherence and mechanical stability compared to conventionally processed MSC cathodes, making them ready for systematic investigation of electrochemical performance.

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Section: Introductionmentioning

confidence: 99%

Novel processing of La0.58Sr0.4Co0.2Fe0.8O3−δ cathodes for metal-supported fuel cells

et al. 2017

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“…3 The most common design of the metal-supported SOFCs is planar geometry; however, the advantages of tubular designs, such as no need for sealing and high tolerance to thermal cycles, are incorporated in the tubular metallic interconnect-supported SOFC developed by Ikerlan. 4 The Cr migration observed from the metallic interconnects to the cathodes, by evaporation or diffusion, degrades the electrochemical properties of the SOFC system by decomposition of the cathode or deposition at the active sites of oxygen reduction [5][6][7] and increases the contact resistance by the formation of alkaline earth chromates at the interface between the cathode and interconnect. 8 It has been demonstrated that the ferritic steels forming MnCr 2 O 4 /Cr 2 O 3 oxide under oxidizing SOFC operating conditions substantially reduce the Cr evaporation.…”

mentioning

confidence: 99%

Spinel and Perovskite Protection Layers Between Crofer22APU and La[sub 0.8]Sr[sub 0.2]FeO[sub 3] Cathode Materials for SOFC Interconnects

Montero

Jordan

Pirón-Abellán

et al. 2009

J. Electrochem. Soc.

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The interaction of the metallic interconnects with the cathode and the resulting time-dependent resistance of these material combinations is a major problem in solid oxide fuel cells (SOFCs). In this study, different conductive oxide coatings were used as protective layers to improve surface stability and electrical performance, as well as to mitigate or prevent chromium poisoning of the cells. Dense layers were obtained on the steel by electron-beam physical vapor deposition, by screen printing and by electroplating. The degradation of the interface between the coated Crofer22APU alloy and the normalLa0.8normalSr0.2FenormalO3 (LSF) cathode was studied by resistance measurements in air at 800°C up to 1000h and analyzed by scanning electron microscopy, energy-dispersive X-ray analysis, X-ray diffraction, and secondary ion mass spectrometry after exposure. normalLa0.6normalSr0.4FenormalO3 measured the lowest resistance between the tested coatings. The highest resistance was found for CenormalO2 , which also showed low protection against SrCrnormalO4 formation. normalY2normalO3 exhibited the lowest resistance increase; however, this coating was not protective enough to prevent the formation of SrCrnormalO4 , especially during cyclic operation. Among the Mn–Co–Fe spinel compositions tested, the lowest resistivity values and the highest Cr retention were obtained with the MnnormalCo1.9normalFe0.1normalO4 spinel.

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“…Lastly, insertion of a diffusion barrier layer (DBL) has been explored extensively as a solution to avoid reaction of Ni and Fe/Cr. (10)(11)(12)(13)(14). The barrier layer must prevent inter-diffusion while allowing electron and gas transport.…”

Section: Introductionmentioning

confidence: 99%

Y_0.08Sr_0.88TiO₃-CeO₂ Composite as a Diffusion Barrier Layer of STS-Supported SOFC

Kim

Choi

2013

ECS Trans.

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Metal-supported SOFC (MS-SOFC) is promising for use at intermediate temperature range (500-700°C) since metal could provide the good thermal conductivity and the mechanical strength in addition to the low cost. The MS-SOFCs are often fabricated by co-firing of in reducing atmosphere to avoid metal oxidation. However, the inter-diffusion between Fe/Cr in stainless steel (STS) and Ni in the anode is detrimental to the electrochemical performance of the cell. In this study, Y0.08Sr0.88TiO3-CeO2 composite was used as a diffusion barrier layer (DBL). The effect of DBL and the cell performance will be discussed.

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Tubular Metal Supported SOFC Development for Domestic Power Generation

Cited by 20 publications

References 1 publication

Novel processing of La0.58Sr0.4Co0.2Fe0.8O3−δ cathodes for metal-supported fuel cells

Novel processing of La0.58Sr0.4Co0.2Fe0.8O3−δ cathodes for metal-supported fuel cells

Spinel and Perovskite Protection Layers Between Crofer22APU and La[sub 0.8]Sr[sub 0.2]FeO[sub 3] Cathode Materials for SOFC Interconnects

Y_0.08Sr_0.88TiO₃-CeO₂ Composite as a Diffusion Barrier Layer of STS-Supported SOFC

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Tubular Metal Supported SOFC Development for Domestic Power Generation

Cited by 20 publications

References 1 publication

Novel processing of La0.58Sr0.4Co0.2Fe0.8O3−δ cathodes for metal-supported fuel cells

Novel processing of La0.58Sr0.4Co0.2Fe0.8O3−δ cathodes for metal-supported fuel cells

Spinel and Perovskite Protection Layers Between Crofer22APU and La[sub 0.8]Sr[sub 0.2]FeO[sub 3] Cathode Materials for SOFC Interconnects

Y0.08Sr0.88TiO3-CeO2 Composite as a Diffusion Barrier Layer of STS-Supported SOFC

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Y_0.08Sr_0.88TiO₃-CeO₂ Composite as a Diffusion Barrier Layer of STS-Supported SOFC