Dynamic evaluation of low-temperature metal-supported solid oxide fuel cell oriented to auxiliary power units

Wang, Zhenwei; Berghaus, J. Oberste; Yick, Sing; Decès-Petit, Cyrille; Qu, Wei; Hui, Rob; Marić, Radenka; Ghosh, Dave

doi:10.1016/j.jpowsour.2007.10.002

Cited by 73 publications

(32 citation statements)

References 30 publications

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“…These high temperatures tend to lead to serious corrosion of the metallic substrate. To solve the problem, different processing routes to fabricate electrodes and dense electrolytes on metallic supports have been employed, such as atmospheric plasma spray processing (APS) [3], vacuum plasma spraying (VPS) [4], suspension plasma spraying [5], high-velocity oxy-fuel (HVOF) spraying of liquid suspension feedstock [6], pulsed laser deposition (PLD) [7] and high temperature co-sintering in reducing atmosphere [1;8;9]. DTU Energy Conversion (part of former Risø DTU, hereafter referred to as DTU) has developed an unconventional cell design based on porous and highly electronically conducting layers into which electrocatalytically active anode materials (CGO and minor amounts of Ni) are infiltrated after sintering [10].…”

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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Section: Introductionmentioning

confidence: 99%

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

et al. 2013

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“…Toward lowering operation temperatures, there is a tendency to shift ceramic-supported SOFCs to metal-supported SOFCs due to the potential benefits of low cost, high strength, better workability, good thermal conductivity and quicker start-up [12][13][14]. Quicker start-up and thermal cycling are considered as the main causes of ceramic-supported SOFC breakage and stack failure [15,16].…”

Section: Introductionmentioning

confidence: 99%

Novel Metal Substrates for High Power Metal‐supported Solid Oxide Fuel Cells

et al. 2016

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“…Metal supported SOFCs can also enable conventional metal joining techniques in the stack assembly. Ferritic stainless steels offer well-matched thermal expansion coefficient (TEC) with commonly used ceramics (TEC 8YSZ * 10.4-11.0 ppmK -1 , TEC GDC * 12.7 ppmK -1 , TEC NiO/YSZ * 12.3 ppmK -1 for an NiO/YSZ composite with 53 vol %NiO and TEC 430L * 11.4 -ppmK -1 ) which is beneficial for withstanding repeated thermal stresses caused by rapid thermal cycling [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Vacuum-sintered stainless steel porous supports for inkjet printing of functional SOFC coatings

Tomov

Krauz

Tłuczek

et al. 2015

Mater Renew Sustain Energy

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Porous metal supports for SOFC applications were produced via conventional powder metallurgy routes-tape casting and high-pressure injection moulding. The supports were sintered in vacuum at different vacuum levels and temperatures. Commercially accessible low-cost stainless steel 430L powder was chosen as source material. The relations between the vacuum sintering temperature and the supports properties were studied. The density and the open porosity distribution of sintered supports were determined by Archimedes' method, Optical Image Analysis and Hg-porosimetry. The microstructure and the stainless steel grain surface composition evolution were investigated by scanning electron microscope and energy dispersive X-ray spectrometry. direct ceramic inkjet printing (DCIJP) was employed as coating technology for depositing anode (NiO/GDC) and electrolyte GDC coatings. Suspension anode and electrolyte inks were developed in-house and the printing procedure was optimized to produce uniform coatings with thicknesses below 15 lm. The analyses confirmed that the as-produced substrates were suitable to support DCIJP deposited SOFC functional coatings.

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Dynamic evaluation of low-temperature metal-supported solid oxide fuel cell oriented to auxiliary power units

Cited by 73 publications

References 30 publications

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

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

Novel Metal Substrates for High Power Metal‐supported Solid Oxide Fuel Cells

Vacuum-sintered stainless steel porous supports for inkjet printing of functional SOFC coatings

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