A model for oxidation-induced stress analysis of Ni-based anode-supported planar solid oxide fuel cell

Shang, Shuaipeng; Lü, Yongjun; Cao, Xinlei; Song, Xu Chun; Wang, Fenghui

doi:10.1016/j.ijhydene.2019.04.166

Cited by 16 publications

(3 citation statements)

References 49 publications

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“…In the porous electrodes, the effective value of the thermal conductivity can be calculated by the Equation (12). The conductivity, the specific heat and the density of the solid material in the different subdomains are outlined in Table 1.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The advantage of a planar SOFC is its low electrical resistance, its simplicity in fabrication, low cost, easy assembly of stack, and high efficiency. Its disadvantage is that it presents difficult sealing given differences in the thermal expansion coefficients of ceramic cells and metal materials at high temperature during stacking [10][11][12]. The main advantage of tubular SOFC is the simplified sealing technology, simple cell assembly and strong anti-stress ability, however, the low power density and high cost of the tubular SOFC restrict its commercial development.…”

Section: Introductionmentioning

confidence: 99%

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Detailed comparison of the performance between a simple and a modified mono-block-layer-built type solid oxide fuel cell

et al. 2022

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A detailed comparison of the performance between a simple Mono-Block-Layer-Build (MOLB) type Solid Oxide Fuel Cell (SOFC) geometry and a MOLB type SOFC with an embedded porous pipe in the air supply channel is carried out. The study considers constant and variable porosities along the porous pipe, fed with an airflow in a counter-flow arrangement. Four cases are analyzed: a) without the porous pipe, b) with a pipe of constant porosity, c) with two different porosities, and d) with four variable porosities. This work is based in a three-dimensional Computational Fluid Dynamics (CFD) model that considers the phenomena of mass transfer, heat transfer, species transport and electrochemical reactions. Detailed comparisons of the voltage, temperature and species concentration are illustrated. The electrode-electrolyte interface contours of species concentration, temperature and electric fields are compared. The results show that there is approximately twice the current density in the geometry that considers the two different porosities compared to the simple geometry. The consumption of hydrogen has the same behavior for the entire tested current density, while the availability of oxygen at the cathode-electrolyte interface is improved in cases with porous pipe compared to the simple MOLB-type geometry. The use of a porous pipe embedded in the air channel showed that it is possible to have a wider operating range of a MOLB-type SOFC, and allowed to obtain a more homogeneous temperature distribution on the electrode-electrolyte interface of the SOFC, consequently, there is the possibility of reducing the thermal stress in the SOFC.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detailed comparison of the performance between a simple and a modified mono-block-layer-built type solid oxide fuel cell

et al. 2022

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“…Residual stresses are developed during the manufacturing process of the cells due to the thermo-elastic mismatch between the cell layers (Selçuk et al, 2001;He et al, 2011;Molla et al, 2013;Wei et al, 2018;Shang et al, 2019;Frandsen et al, 2021). These residual stresses can result in performance degradation (Li et al, 2020;Liu et al, 2021) as a result of delamination (Selçuk et al, 2001) or the formation of cracks in the cell layers (Selçuk et al, 2001;Ettler et al, 2010;Li et al, 2010) and in the extreme case may lead to the complete deterioration of the cell Zhang et al, 2008;Villanova et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Potential Effect of Cell Shape and Size on the Residual Stress in Solid Oxide Fuel Cells

Azari

Abdoli²,

Torabi³

et al. 2022

Front. Energy Res.

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In the manufacturing process of solid oxide fuel cells (SOFCs), the residual stresses and curvature are developed in components due to the differences in material properties of cell layers. Residual stress may lead to the crack formation in the cell layers and facilitates cell fracture. In this work, the changes of the residual stress in the electrolyte layer of the anode-supported planar solid oxide fuel cells are experimentally determined at room temperature. The “sin2ψ” technique of X-ray diffraction method is employed to measure the residual stress in the half-cell samples. Investigation on the changes of the residual stress and curvature state in the scaling-up process of the cell is crucial for commercial use. Therefore, several cells with different sizes and shapes are investigated to evaluate the potential impact of cell size and cell shape on the residual thermal stress. Values of about −610 MPa are determined for the electrolyte layer on an oxidized ∼400 μm thick anode substrate. The results reveal that despite the effect of size and shape on the radius of curvature, these parameters have no significant impact on the residual stress level.

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Simulation and analysis of sintering warping and thermal stress for a cermet half-cell of solid oxide fuel cells

Deng

Xiao

Zhu

et al. 2023

Ceramics International

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A model for oxidation-induced stress analysis of Ni-based anode-supported planar solid oxide fuel cell

Cited by 16 publications

References 49 publications

Detailed comparison of the performance between a simple and a modified mono-block-layer-built type solid oxide fuel cell

Detailed comparison of the performance between a simple and a modified mono-block-layer-built type solid oxide fuel cell

Experimental Investigation on Potential Effect of Cell Shape and Size on the Residual Stress in Solid Oxide Fuel Cells

Simulation and analysis of sintering warping and thermal stress for a cermet half-cell of solid oxide fuel cells

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