A numerical investigation of modeling an SOFC electrode as two finite layers

Hussain, Mohammed; Li, X.; Dinçer, İbrahim

doi:10.1016/j.ijhydene.2009.01.049

Cited by 41 publications

(31 citation statements)

References 25 publications

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“…It can be found that the EAT increases from 8.1 μm to 9.4 μm under Vcell=0.8V as operating temperature T decreases from 1173K to 873K, which is consistent with results in [7]. On the contrary, [5,14,4,26] revealed that the EAT was negatively correlated with operating temperature T.…”

Section: Effect Of Operating Conditionssupporting

confidence: 86%

“…12 shows the effect of the volume fraction of electron conducting phase Ψel on EAT. Same with [7,14,4], a larger EAT is obtained with a lower content of the electron conducting phase Ψel.…”

Section: Effect Of Structure Parametersmentioning

confidence: 89%

“…[4] that the EAT in anode is about 20 μm when the operating temperature is 1073K, current density is 0.5 A/m 2 and average particle radius is 0.1 μm. Furthermore, it is revealed in their study that the EAT is increased to about 60 μm when operating temperature is increased to 1273 K. Yoshinori Suzue et al [5] and Naoki Shikazono et al [6] solved the governing equations describing gas, ion and electron transport using Lattice Boltzmann Method (LBM) based on their reconstructed…”

Section: Introductionmentioning

confidence: 97%

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Investigation of the electrochemical active thickness of solid oxide fuel cell anode

Zheng

2014

International Journal of Hydrogen Energy

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Section: Effect Of Operating Conditionssupporting

confidence: 86%

Section: Effect Of Structure Parametersmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 97%

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Investigation of the electrochemical active thickness of solid oxide fuel cell anode

Zheng

2014

International Journal of Hydrogen Energy

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“…Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) can be used to predict the effective properties of the composite electrode using the mono-particle size distribution of each type of material. Equations (20)(21)(22)(23)(24)(25)(26)(27)(28)(29) can be used to predict the effective properties of the composite electrode using the poly-dispersed particle sizes.…”

Section: Resultsmentioning

confidence: 99%

“…The effects of the pore former is further considered into the percolation theory by Bertei et al [18]. Furthermore, the percolation micro-models are generally agreed and widely incorporated into the cell-level models to evaluate the effects of the electrode microstructure parameters on the SOFC performance [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Percolation Theory in Solid Oxide Fuel Cell Composite Electrodes with a Mixed Electronic and Ionic Conductor

Chen

Zhang

et al. 2013

Energies

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Percolation theory is generalized to predict the effective properties of specific solid oxide fuel cell composite electrodes, which consist of a pure ion conducting material (e.g., YSZ or GDC) and a mixed electron and ion conducting material (e.g., LSCF, LSCM or CeO 2 ). The investigated properties include the probabilities of an LSCF particle belonging to the electron and ion conducting paths, percolated three-phase-boundary electrochemical reaction sites, which are based on different assumptions, the exposed LSCF surface electrochemical reaction sites and the revised expressions for the inter-particle ionic conductivities among LSCF and YSZ materials. The effects of the microstructure parameters, such as the volume fraction of the LSCF material, the particle size distributions of both the LSCF and YSZ materials (i.e., the mean particle radii and the non-dimensional standard deviations, which represent the particle size distributions) and the porosity are studied. Finally, all of the calculated results are presented in non-dimensional forms to provide generality for practical application. Based on these results, the relevant properties can be easily evaluated, and the microstructure parameters and intrinsic properties of each material are specified.Keywords: solid oxide fuel cell; percolation theory; mixed electron and ion conductor; LSCF; coordination number; three-phase-boundary sites; electrochemically active sites

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Synergistic effects of sulfur poisoning and gas diffusion on polarization loss in anodes of solid oxide fuel cells

Niu

Wei

et al. 2017

AIChE Journal

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Poisoning effects of sulfur compounds on the performances of solid oxide fuel cells are non‐trivial. However, the synergistic effects of gas diffusion, adsorption, desorption and reaction in anodes are typically neglected. In this work, an analytical model is derived to quantitatively evaluate the poisoning effects of H2S. The results show that sulfur poisoning correlates closely with inefficient gas diffusion for small anode pore size, small porosity/tortuosity, and low working temperatures. As compared with concentration polarization, H2S‐diffusion‐induced activation polarization in thin anodes with a large trueɛnormalτ is detrimental, especially for low‐temperature operations with a high H2S concentration and a low current density. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1127–1134, 2018

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A numerical investigation of modeling an SOFC electrode as two finite layers

Cited by 41 publications

References 25 publications

Investigation of the electrochemical active thickness of solid oxide fuel cell anode

Investigation of the electrochemical active thickness of solid oxide fuel cell anode

Percolation Theory in Solid Oxide Fuel Cell Composite Electrodes with a Mixed Electronic and Ionic Conductor

Synergistic effects of sulfur poisoning and gas diffusion on polarization loss in anodes of solid oxide fuel cells

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