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Energies 2014, 7(9), 5647-5674; doi:10.3390/en7095647
Article

Modeling Analysis of Bi-Layer Ni-(ZrO2)x(Y2O3)1−x Anodes for Anode-Supported Intermediate Temperature-Solid Oxide Fuel Cells

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Received: 26 June 2014; in revised form: 1 August 2014 / Accepted: 1 August 2014 / Published: 28 August 2014
(This article belongs to the Special Issue Reacting Transport Phenomena in Solid Oxide Fuel Cells)
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Abstract: Intermediate temperature-solid oxide fuel cell (IT-SOFC) Ni-(ZrO2)x(Y2O3)1−x (Ni-YSZ) anodes formed by two layers, with different thicknesses and morphologies, offer the possibility of obtaining adequate electrochemical performance coupled to satisfactory mechanical properties. We investigate bi-layered Ni-YSZ anodes from a modeling point of view. The model includes reaction kinetics (Butler-Volmer equation), mass transport (Dusty-Gas model), and charge transport (Ohm’s law), and allows to gain an insight into the distribution of the electrochemical reaction within the electrode. Additionally, the model allows to evaluate a reciprocal overall electrode resistance 1/Rp ≈ 6 S·cm−2 for a bi-layer electrode formed by a 10 µm thick active layer (AL) composed of 0.25 µm radius Ni and YSZ particles (34% vol. Ni), coupled to a 700 µm thick support layer (SL) formed by 0.5 µm radius Ni and YSZ particles (50% vol. Ni), and operated at a temperature of 1023 K. Simulation results compare satisfactorily to literature experimental data. The model allows to investigate, in detail, the effect of morphological and geometric parameters on the various sources of losses, which is the first step for an optimized electrode design.
Keywords: intermediate temperature-solid oxide fuel cell (IT-SOFC); Ni-(ZrO2)x(Y2O3)1−x (Ni-YSZ) composite; anode; anode-supported cell; bi-layer electrode; modeling intermediate temperature-solid oxide fuel cell (IT-SOFC); Ni-(ZrO2)x(Y2O3)1−x (Ni-YSZ) composite; anode; anode-supported cell; bi-layer electrode; modeling
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Enrico, A.; Cannarozzo, M.; Costamagna, P. Modeling Analysis of Bi-Layer Ni-(ZrO2)x(Y2O3)1−x Anodes for Anode-Supported Intermediate Temperature-Solid Oxide Fuel Cells. Energies 2014, 7, 5647-5674.

AMA Style

Enrico A, Cannarozzo M, Costamagna P. Modeling Analysis of Bi-Layer Ni-(ZrO2)x(Y2O3)1−x Anodes for Anode-Supported Intermediate Temperature-Solid Oxide Fuel Cells. Energies. 2014; 7(9):5647-5674.

Chicago/Turabian Style

Enrico, Anna; Cannarozzo, Marco; Costamagna, Paola. 2014. "Modeling Analysis of Bi-Layer Ni-(ZrO2)x(Y2O3)1−x Anodes for Anode-Supported Intermediate Temperature-Solid Oxide Fuel Cells." Energies 7, no. 9: 5647-5674.


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