An extensive treatment of the agglomerate model for porous electrodes in molten carbonate fuel cells—I. Qualitative analysis of the steady-state model

Prins-Jansen, J.A.; Hemmes, K.; Wit, J.H.W. de

doi:10.1016/s0013-4686(97)00032-7

Cited by 38 publications

(27 citation statements)

References 12 publications

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“…Due to the competing effects of mass transfer and increase in surface area, the polarization loss should go through an optimum as the electrode thickness is increased. However, both in our model simulations and in PrinsJansen et al 3 we observe a monotonic dependency where polarization loss always increases with increase in thickness. This can be attributed to the assumption involved in the model simulation, i.e., the active surface area does not change with an increase in thickness.…”

Section: Resultssupporting

confidence: 62%

“…Further, this approach has also been applied to determine the reaction kinetic parameters through impedance analysis. The performance of the MCFC cathode has been analyzed extensively using the agglomerate model by Prins-Jansen et al 3 Kunz et al 4 used the agglomerate approach but assumed that the reaction proceeded only on the interior surface of the agglomerate but not on the surface of the film. Further, they incorporated the varying electrolyte fill in the cathode by correlating the porosimetry data to the agglomerate diameter.…”

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confidence: 99%

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Analysis of Molten Carbonate Fuel Cell Performance Using a Three-Phase Homogeneous Model

Subramanian

Haran

Ganesan

et al. 2003

J. Electrochem. Soc.

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In this study a three-phase homogeneous model was developed to simulate the performance of the molten carbonate fuel cell (MCFC) cathode. The homogeneous model is based on volume averaging of different variables in the three phases over a small volume element. This approach can be used to model porous electrodes as it represents the real system much better than the conventional agglomerate model. Using the homogeneous model the polarization characteristics of the MCFC cathode was studied under different operating conditions. © 2002 The Electrochemical Society. All rights reserved.

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Section: Resultssupporting

confidence: 62%

mentioning

confidence: 99%

Analysis of Molten Carbonate Fuel Cell Performance Using a Three-Phase Homogeneous Model

Subramanian

Haran

Ganesan

et al. 2003

J. Electrochem. Soc.

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“…These values will be different for other mechanisms [22,26]. At the gas-solid interface there is no reaction.…”

Section: Mass Transport Equationsmentioning

confidence: 97%

“…Several theoretical models have been derived for the molten carbonate fuel cathode [20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Earlier approaches to modeling the MCFC cathode have relied on empirical equations, which are restricted to the specific cathode material and design parameters for which the equations have been derived.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

White¹,

Popov²

2001

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The dissolution of NiO cathodes during cell operation is a limiting factor to the successful commercialization of molten carbonate fuel cells (MCFCs). Lithium cobalt oxide coating onto the porous nickel electrode has been adopted to modify the conventional MCFC cathode which id believed to increase the stability of the cathodes in the carbonate melt. The material used for surface modification should possess thermodynamic stability in the molten carbonate and also should be electro catalytically active for MCFC reactions. Lithium Cobalt oxide was coated on Ni cathode by a sol-gel coating. The morphology and the LiCoO 2 formation of LiCoO 2 coated NiO was studied using scanning electron microscopy and X-Ray diffraction studies respectively.

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“…Several theoretical models have been derived for the molten carbonate fuel cathode [27][28][29][30][31][32][33][34][35][36][37]. First principles based theoretical models for MCFC cathode can be divided into the thin film model [27] and the agglomerate model [28].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

Colonmer¹,

Ganesan²,

Subramanian³

et al. 2002

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This project focused on addressing the two main problems associated with state of art Molten Carbonate Fuel Cells, namely loss of cathode active material and stainless steel current collector deterioration due to corrosion. We followed a dua l approach where in the first case we developed novel materials to replace the cathode and current collector currently used in molten carbonate fuel cells. In the second case we improved the performance of conventional cathode and current collectors through surface modification. States of art NiO cathode in MCFC undergo dissolution in the cathode melt thereby limiting the lifetime of the cell. To prevent this we deposited cobalt using an electroless deposition process. We also coated perovskite The corrosion of the current collector in the cathode side was also studied. The corrosion characteristics of both SS304 and SS304 coated with Co-Ni alloy were studied. This study confirms that surface modification of SS304 leads to the formation of complex scales with better barrier properties and better electronic conductivity at 650 o C.A three phase homogeneous model was developed to simulate the performance of the molten carbonate fuel cell cathode and the complete fuel cell. The homogeneous model is based on volume averaging of different variables in the three phases over a small volume element. This approach can be used to model porous electrodes as it represents the real system much better than the conventional agglomerate model. Using the homogeneous model the polarization characteristics of the MCFC cathode and fuel cell were studied under different operating conditions. Both the cathode and the full cell model give good fits to the experimental data.

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An extensive treatment of the agglomerate model for porous electrodes in molten carbonate fuel cells—I. Qualitative analysis of the steady-state model

Cited by 38 publications

References 12 publications

Analysis of Molten Carbonate Fuel Cell Performance Using a Three-Phase Homogeneous Model

Analysis of Molten Carbonate Fuel Cell Performance Using a Three-Phase Homogeneous Model

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

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