Effect of Ni content in SOFC Ni-YSZ cermets: A three-dimensional study by FIB-SEM tomography

Vivet, N.; Chupin, Sylvain; Estrade, E.; Richard, Annie; Bonnamy, Sylvie; Rochais, Denis; Bruneton, E.

doi:10.1016/j.jpowsour.2011.07.010

Cited by 89 publications

(52 citation statements)

References 33 publications

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“…This property of the model can be useful to control the 'coverage rate' of one phase to the other, and hence, to adapt the interfacial specific surface areas between the electrode phases. This model property is 25 illustrated on Fig. 9: by changing the domain partitioning, the specific surface areas can be easily tuned by keeping the same phase volume fractions and phase characteristic lengths.…”

Section: Impact Of Domain Partitioningmentioning

confidence: 99%

See 1 more Smart Citation

Stochastic geometrical modeling of solid oxide cells electrodes validated on 3D reconstructions

Moussaoui

Laurencin

Gavet

et al. 2018

Computational Materials Science

106

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Abstract. An original 3D stochastic model, based on the truncated plurigaussian random fields, has been adapted to simulate the complex microstructure of SOC electrodes. The representativeness of the virtual microstructures has been checked on several synchrotron Xray and FIB-SEM tomographic reconstructions obtained on typical LSCF, LSC and Ni-YSZ electrodes. The validation step has been carried out by comparing numbers of electrode morphological properties as well as the phase effective diffusivities. This analysis has shown that the synthetic media mimic accurately the complex microstructure of typical SOC electrodes. The model capability to simulate different types of promising electrode architectures has also been investigated. It has been shown that the model is able to generate virtual electrode prepared by infiltration resulting in a uniform and continuous thin layer covering a scaffold.With a local thresholding depending on the position, continuous graded electrodes can be also produced. Finally, the model offers the possibility to introduce different correlation lengths for each phase in order to control the local topology of the interfaces. All these cases illustrate the model flexibility to generate various SOC microstructures. This validated and flexible model can be used for further numerical microstructural optimizations to improve the SOC performances.Keyword: Solid Oxide Cell, 3D microstructure model, truncated plurigaussian random fields, X-ray tomography, Electrode design.

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Section: Impact Of Domain Partitioningmentioning

confidence: 99%

“…Some authors [14,17,[23][24][25][26] have taken advantage of these techniques to study the links between the electrode microstructural parameters. However, this approach is time consuming as it needs the manufacturing and the characterization of several cells.…”

Section: Introductionmentioning

confidence: 99%

Stochastic geometrical modeling of solid oxide cells electrodes validated on 3D reconstructions

Moussaoui

Laurencin

Gavet

et al. 2018

Computational Materials Science

106

View full text Add to dashboard Cite

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“…The initial structure and composition of the electrode also plays a role in both electrode performance and degree of Ni agglomeration. A Ni content of 40e44 vol% typically results in maximum TPB length, although Ni particle size, structure, and electrode porosity are also important factors [20]. A Ni content of at least 30 vol% gives rise to a well-connected Ni network for acceptable electronic conductivity, although this threshold increases with larger Ni particle size or lower sintering temperature [21].…”

Section: Introductionmentioning

confidence: 99%

Role of initial microstructure on nickel-YSZ cathode degradation in solid oxide electrolysis cells

Keane

Fan

Han

et al. 2014

International Journal of Hydrogen Energy

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“…To assure the reliability of the analysis, we generated 150 independent parallel lines with 0.2um line spacing for each digital image. The following equations 7,8,10) are used to calculate the contiguity between the same phases in a two phase (α, β) composite:…”

Section: Quantification Of Microstructurementioning

confidence: 99%

“…Anode support for a solid oxide fuel cells (SOFCs) is desired to have high electrical conductivity and mechanical stability at its operating temperature range (650 -1000°C) [1][2][3][4][5][6][7] . Since in the past couple of years, a great deal of research has been carried out to assess the performance of anodes for solid oxide fuel cells by using a quantitative microstructure analysis through a micrograph generated by either an optical or electron microscopes.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Microstructure Analysis to Predict Electrical Property of NiO-YSZ Anode Support for SOFCs

Wahyudi¹,

Ahmed²,

Lee³

et al. 2013

Transactions of the Korean hydrogen and new energy society

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>> The correlation between NiO-YSZ microstructure and its electrical property used for SOFC anode was critically evaluated with image processing and direct measurement techniques. These innovative processing techniques were employed to quantify the contiguity of the anode constituent phase. The calculated contiguities were then correlated with electrical conductivity attained from 4-probe DC method. This investigation described that contiguity of nickel oxide phases of an anode has a linear relationship with its electrical conductivity. We observed that the contiguity of NiO increased from 0.18 to 0.50 then electrical conductivity attained was significantly increased from 520 S/cm to 1468 S/cm at 900°C.

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Effect of Ni content in SOFC Ni-YSZ cermets: A three-dimensional study by FIB-SEM tomography

Cited by 89 publications

References 33 publications

Stochastic geometrical modeling of solid oxide cells electrodes validated on 3D reconstructions

Stochastic geometrical modeling of solid oxide cells electrodes validated on 3D reconstructions

Role of initial microstructure on nickel-YSZ cathode degradation in solid oxide electrolysis cells

Quantitative Microstructure Analysis to Predict Electrical Property of NiO-YSZ Anode Support for SOFCs

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