Fracture of Porous Ceramics: Application to the Mechanical Degradation of Solid Oxide Cell During Redox Cycling

Abaza, Amira; Meille, Sylvain; Nakajo, Arata; Leguillon, Dominique; Hubert, Maxime; Lenser, Christian; Laurencin, Jérôme

doi:10.1149/10301.1151ecst

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…A multiscale and multiphysics model has been developed at CEA to unravel the underlying processes involved in the cell operation and degradation (8)(9)(10). The model is used to propose a deep understanding of the reaction mechanisms that take place in the electrodes (11)(12)(13).…”

Section: Cellsmentioning

confidence: 99%

Recent Highlights on Solid Oxide Cells, Stacks and Modules Developments at CEA

Mouginn,

Laurencin,

Vulliet

et al. 2023

ECS Trans.

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Solid Oxide Cell (SOC) technology is considered as an efficient electrolysis technology to produce hydrogen at large scale. It can also operate in fuel cell mode using different fuels (carbon-based or non-carbon based like ammonia), and in reversible mode. Though proofs-of concept have been achieved at different relevant scales for those operating modes, some R&D works still need to be performed to improve performance, durability and cost. Improved and upscaled cells and stacks need to be developed, with a methodology combining multiscale and multiphysics modelling, electrochemical characterization in relevant conditions and advanced post-test analysis. Their integration into modules made of several stacks is also a stepping stone in order to reach multi-MW electrolysers. CEA is working on the whole value chain of SOC technology, from cell development and optimisation to module design and operation through stack upscaling. Recent achievements on those aspects will be presented.

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Section: Cellsmentioning

confidence: 99%

Recent Highlights on Solid Oxide Cells, Stacks and Modules Developments at CEA

Mouginn,

Laurencin,

Vulliet

et al. 2023

ECS Trans.

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show abstract

“…Single-directional compression can cause cracks, because compression generates both compressive and tensile stresses, and crack expansion is due to tensile stress, not compressive stress. According to, 22 when a solid is subjected to one-way compression, the crack is perpendicular to the direction of tensile Table II. Mechanical properties of materials.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Xiang et al 21 used peridynamic method to simulate the crack propagation in an anode microstructure under external displacement load. Abaza et al 22 predicted the crack nucleation and propagation of porous YSZ using the phase field fracture method. A transition in the fracture mode was detected from brittle behavior toward local damage as the porosity increased.…”

mentioning

confidence: 99%

Fracture Simulation of Ni–YSZ Anode Microstructures of Solid Oxide Fuel Cells Using Phase Field Method

Li¹,

Xue²,

Feng³

et al. 2022

J. Electrochem. Soc.

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The performance degradation of solid oxide fuel cells (SOFC) is directly related to the damage and fracture of electrode microstructures. In this study, the phase field fracture method is used to simulate the fracture of anode microstructures, and the effects of boundary constraints, thermal load, and Ni phase on the fracture of Ni–YSZ anode microstructures are investigated. Results show that tensile stresses occur in the Ni and YSZ phases whether above or below the reference temperature. The cracks propagate along the direction perpendicular to the first principal stress, showing a brittle fracture characteristic. When the microstructure is cooled, all cracks appear in YSZ phase, and almost all cracks initiate at the lowest point of YSZ–pore concave interface. When the microstructure is heated, the tensile first principal stress induces few cracks at local positions but will not make the cracks propagate continuously. The thermal mismatch between Ni and YSZ is not enough to induce cracks, and the fracture of electrode microstructure is more likely to be caused by external tensile load or the thermal mismatch between anode and electrolyte layers. The presence of Ni increases the stiffness of the microstructure, and solid phase’s disconnection reduces the strength of the microstructure.

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Fracture of Porous Ceramics: Application to the Mechanical Degradation of Solid Oxide Cell During Redox Cycling

Cited by 2 publications

References 26 publications

Recent Highlights on Solid Oxide Cells, Stacks and Modules Developments at CEA

Recent Highlights on Solid Oxide Cells, Stacks and Modules Developments at CEA

Fracture Simulation of Ni–YSZ Anode Microstructures of Solid Oxide Fuel Cells Using Phase Field Method

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