Performance of metal-supported SOFCs with infiltrated electrodes

Tucker, Michael C.; Lau, Grace Y.; Jacobson, Craig P.; DeJonghe, Lutgard C.; Visco, Steven J.

doi:10.1016/j.jpowsour.2007.06.076

Cited by 193 publications

(131 citation statements)

References 15 publications

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“…show not only advanced thermal resistance, good mechanical strength and improved sealing efficiency but also a relatively quick start up property when compared to those qualities of general SOFCs [9][10][11][12][13][14]. However, oxidation of the metal substrate, the NiCr-Fe material and the anode substrate comprised of MS-SOFCs can occur in the high temperature range fabrication condition [15,16], which indicates that all of fabrication processing has to be carried out under hydrogen or inert gas.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties and durability of in-situ composite cathodes with SmBa0.5Sr0.5Co2O5+δ for metal supported solid oxide fuel cells

Irvine

Bae

Park

et al. 2017

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 99%

Electrochemical properties and durability of in-situ composite cathodes with SmBa0.5Sr0.5Co2O5+δ for metal supported solid oxide fuel cells

Irvine

Bae

Park

et al. 2017

International Journal of Hydrogen Energy

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“…They have many potential advantages such as good thermal conductivity and ductility of the metallic substrate, which may both improve thermal shock resistance, and lower the internal temperature gradients, allowing quicker start-up [1]. If successful, metal-based SOFC stack technologies have the potential to improve functionality, reliability and reproducibility and reduce the manufacturing cost of SOFC stacks [2], in particular for APU applications which require: fast start-up and thermal cycling CO and hydrocarbon rich fuels high current density shock vibration resistance fast transients in electrical loads red-ox cycling Since metal supported SOFCs have an intrinsically different mechanical behavior, compared to ceramic components, it makes them potential candidates for withstanding the mechanical stresses e.g.…”

Section: Introductionmentioning

confidence: 99%

Break‐down of Losses in High Performing Metal‐Supported Solid Oxide Fuel Cells

et al. 2013

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Metal supported SOFC designs offer competitive advantages such as reduced material costs and improved mechanical robustness. On the other hand, disadvantages might arise due to possible corrosion of the porous metal parts during processing and operation at high fuel utilization. In this paper we present the results of performance and stability improvements for a metal supported cell developed within the European project METSOFC and the Danish National Advanced Technology Foundation. The cells consist of a porous metal backbone, a metal / zirconia cermet anode and a 10ScYSZ electrolyte, cofired in hydrogen. The electrochemically active parts were applied by infiltrating CGO-Ni precursor solution into the porous metal and anode backbone and screenprinting (La,Sr)(Co,Fe)O 3 -based cathodes. To prevent a solid state reaction between cathode and zirconia electrolyte, CGO buffer layers were applied in between cathode and electrolyte. The detailed electrochemical characterization by means of impedance spectroscopy and a subsequent data analysis by the distribution of relaxation times enabled us to separate the different loss contributions in the cell. Based on an appropriate equivalent circuit model, the ohmic and polarization losses related to the gas diffusion in the metal support, the electrooxidation in the anode functional layer and the oxygen reduction in the mixed ionic electronic conducting cathode were determined. An additional process with a rather high relaxation frequency could be attributed to the formation of insulating interlayers at the cathode/electrolyte-interface. Based on these results, selective measures to improve performance and stability, such as (i) an improved PVD-deposited CGO buffer layer, (ii) LSC-CGO based in-situ sintered cathodes and (iii) reduced corrosion of the metal support were adopted and validated.

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“…Lab scale infiltration of both cathode and anodes has been demonstrated by various groups [9,10] in laboratory conditions. The infiltration is usually performed with micro pipette drop delivery or sample immersion.…”

Section: Introductionmentioning

confidence: 99%

Infiltration of commercially available, anode supported SOFC’s via inkjet printing

Mitchell-Williams

Tomov

Saadabadi

et al. 2017

Mater Renew Sustain Energy

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Commercially available anode supported solid oxide fuel cells (NiO-8YSZ/8YSZ/LSCF-20 mm in diameter) were anode infiltrated with gadolinium doped ceria (CGO) using a scalable drop-on-demand inkjet printing process. Cells were infiltrated with two different precursor solutions-water based or propionic acid based. The saturation limit of the 0.5 lm thick anode supports sintered at 1400°C was found to be approximately 1wt%. No significant enhancement in power output was recorded at practical voltage levels. Microstructural characterisation was carried out after electrochemical performance testing using high resolution scanning electron microscopy. This work demonstrates that despite the feasibility of achieving CGO nanoparticle infiltration into thick, commercial SOFC anodes with a simple, low-cost and industrially scalable procedure other loss mechanisms were dominant. Infiltration of model symmetric anode cells with the propionic acid based ink demonstrated that significant reductions in polarisation resistance were possible.

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Performance of metal-supported SOFCs with infiltrated electrodes

Cited by 193 publications

References 15 publications

Electrochemical properties and durability of in-situ composite cathodes with SmBa0.5Sr0.5Co2O5+δ for metal supported solid oxide fuel cells

Electrochemical properties and durability of in-situ composite cathodes with SmBa0.5Sr0.5Co2O5+δ for metal supported solid oxide fuel cells

Break‐down of Losses in High Performing Metal‐Supported Solid Oxide Fuel Cells

Infiltration of commercially available, anode supported SOFC’s via inkjet printing

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