Compilation of mechanical properties for the structural analysis of solid oxide fuel cell stacks. Constitutive materials of anode-supported cells

Nakajo, Arata; Kuebler, Jakob; Faes, Antonin; Vogt, Ulrich; Schindler, Hans-Jakob; Chiang, Lieh-Kwang; Modena, Stefano; herle, Jan Van; Hocker, Thomas

doi:10.1016/j.ceramint.2012.01.043

Cited by 131 publications

(76 citation statements)

References 105 publications

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“…In the reduced state the elastic modulus decreased linearly with temperature. Strength drop at elevated temperature has previously been reported by Nakajo et al [7], Sukida, Sato, Hashida et al 21, 22 and Malzbender et al [15] for reduced Ni-YSZ anode materials and half-cells, which are consistent with our measurements. Nakajo et al [7] and Malzbender et al [15] however also reported a 13 % and 27 % decrease respectively in strength with increased temperature for the oxidized state.…”

Section: Influence Of Temperature On Strength Of Reduced/unreduced Ansupporting

confidence: 83%

“…The materials tested in Refs. [7], [15] and [22] are NiO-8YSZ, NiO-YSZ/8YSZ and NiO-8YSZ respectively.…”

Section: Discussionmentioning

confidence: 99%

“…linear, exponential and non-linear correlations [6,7,23,47,50]. In the present work, the exponential relationships describing strength and elastic modulus as a function of porosity were used to fit the experimental data, as this has previously been successfully applied for SOFC anodes [6]: is primarily due to the increased porosity introduced by reduction.…”

Section: Influence Of Temperature On Strength Of Reduced/unreduced Anmentioning

confidence: 99%

“…The strength at 800 C in the oxidized state was shown to be reduced relative to room temperature by 13 % and 27 % in [7] and [15], respectively, and by 20 % in reduced state [15]. However, only in one case [7] a high number of samples (30) were tested in the oxidized state at high temperature, allowing a reliable determination of the Weibull modulus.…”

mentioning

confidence: 99%

“…However, only in one case [7] a high number of samples (30) were tested in the oxidized state at high temperature, allowing a reliable determination of the Weibull modulus. In the other works typically only the average strength has been 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 5 supplied.…”

mentioning

confidence: 99%

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Influence of temperature and atmosphere on the strength and elastic modulus of solid oxide fuel cell anode supports

Charlas

Kwok

et al. 2016

Journal of Power Sources

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Section: Influence Of Temperature On Strength Of Reduced/unreduced Ansupporting

confidence: 83%

“…The materials tested in Refs. [7], [15] and [22] are NiO-8YSZ, NiO-YSZ/8YSZ and NiO-8YSZ respectively.…”

Section: Discussionmentioning

confidence: 99%

Section: Influence Of Temperature On Strength Of Reduced/unreduced Anmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Influence of temperature and atmosphere on the strength and elastic modulus of solid oxide fuel cell anode supports

Charlas

Kwok

et al. 2016

Journal of Power Sources

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Materials Issues for Solid Oxide Fuel Cells Design

Morales

Segarra

2015

Handbook of Clean Energy Systems

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Solid oxide fuel cells ( SOFC s) are complex electrochemical devices that convert chemical energy into electrical energy with high efficiency. A single cell contains three basic components, which are a porous anode, a dense electrolyte, and a porous cathode. In order to generate high power for a determined application, the single cells are stacked, thus requiring the use of interconnects and sealants. An important challenge of these devices is the reduction of their operating temperatures for improving materials compatibility between components, reducing energy consumption and time for startup and cooling down, and increasing the durability. Many strategies for lowering operating temperature in SOFC s have been proposed. In comparison to other fuel cell types, an SOFC stack can be designed to operate within a wide temperature range (500–1000°C). Therefore, it is necessary to select the desired operation temperature that is mainly influenced by the specific application, the type of fuel, and the properties of solid electrolyte. It is possible to address the SOFC design from different approaches: selecting materials for each cell component, selecting cell geometry, or selecting stack design. In this article, different alternatives of materials selection, cell geometry, and stack design, depending on the operating temperatures and compatibilities among materials, are presented.

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Phase Transition of a Cobalt‐Free Perovskite as a High‐Performance Cathode for Intermediate‐Temperature Solid Oxide Fuel Cells

et al. 2012

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It is generally recognized that the phase transition of a perovskite may be detrimental to the connection between cathode and electrolyte. Moreover, certain phase transitions may induce the formation of poor electronic and ionic conducting phase(s), thereby lowering the electrochemical performance of the cathode. Here, we present a study on the phase transition of a cobalt-free perovskite (SrNb(0.1)Fe(0.9)O(3-δ), SNF) and evaluate its effect on the electrochemical performance of the fuel cell. SNF exists as a primitive perovskite structure with space group P4mm (99) at room temperature. As evidenced by in situ high-temperature X-ray diffraction measurements over the temperature range of 600 to 1000 °C, SNF undergoes a transformation to a tetragonal structure with a space group I4/m (87). This phase transition is accompanied by a moderate change in the volume, allowing a good cathode/electrolyte interface on thermal cycling. According to the electrochemical impedance spectroscopy evaluation, the I4/m phase exhibits positive effects on the cathode's performance, showing the highest oxygen reduction reaction activity of cobalt-free cathodes reported so far. This activity improvement is attributed to enhanced oxygen surface processes.

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Compilation of mechanical properties for the structural analysis of solid oxide fuel cell stacks. Constitutive materials of anode-supported cells

Cited by 131 publications

References 105 publications

Influence of temperature and atmosphere on the strength and elastic modulus of solid oxide fuel cell anode supports

Influence of temperature and atmosphere on the strength and elastic modulus of solid oxide fuel cell anode supports

Materials Issues for Solid Oxide Fuel Cells Design

Phase Transition of a Cobalt‐Free Perovskite as a High‐Performance Cathode for Intermediate‐Temperature Solid Oxide Fuel Cells

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