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A Three-Dimensional Microstructure-Scale Simulation of a Solid Oxide Fuel Cell Anode—The Analysis of Stack Performance Enhancement After a Long-Term Operation

Author

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  • Tomasz A. Prokop

    (Department of Fundamental Research in Energy Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland)

  • Katarzyna Berent

    (Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-059 Krakow, Poland)

  • Marcin Mozdzierz

    (Department of Fundamental Research in Energy Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland)

  • Janusz S. Szmyd

    (Department of Fundamental Research in Energy Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland)

  • Grzegorz Brus

    (Department of Fundamental Research in Energy Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland)

Abstract

In this research, we investigate the connection between an observed enhancement in solid oxide fuel cell stack performance and the evolution of the microstructure of its electrodes. A three dimensional, numerical model is applied to predict the porous ceramic-metal electrode performance on the basis of microstructure morphology. The model features a non-continuous computational domain based on the digital reconstruction obtained using focused ion beam scanning electron microscopy (FIB-SEM) electron nanotomography. The Butler–Volmer equation is used to compute the charge transfer at reaction sites, which are modeled as distinct locally distributed features of the microstructure. Specific material properties are accounted for using interpolated experimental data from the open literature. Mass transport is modeled using the extended Stefan–Maxwell model, which accounts for both the binary, and the Knudsen diffusion phenomena. The simulations are in good agreement with the experimental data, correctly predicting a decrease in total losses for the observed microstructure evolution. The research supports the hypothesis that the performance enhancement was caused by a systematic change in microstructure morphology.

Suggested Citation

  • Tomasz A. Prokop & Katarzyna Berent & Marcin Mozdzierz & Janusz S. Szmyd & Grzegorz Brus, 2019. "A Three-Dimensional Microstructure-Scale Simulation of a Solid Oxide Fuel Cell Anode—The Analysis of Stack Performance Enhancement After a Long-Term Operation," Energies, MDPI, vol. 12(24), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4784-:d:298276
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    References listed on IDEAS

    as
    1. Han Chang & In-Hee Lee, 2019. "Environmental and Efficiency Analysis of Simulated Application of the Solid Oxide Fuel Cell Co-Generation System in a Dormitory Building," Energies, MDPI, vol. 12(20), pages 1-20, October.
    2. Alexandros Arsalis & George E. Georghiou, 2018. "A Decentralized, Hybrid Photovoltaic-Solid Oxide Fuel Cell System for Application to a Commercial Building," Energies, MDPI, vol. 11(12), pages 1-20, December.
    3. V. H. Rangel-Hernandez & C. Torres & A. Zaleta-Aguilar & M. A. Gomez-Martinez, 2019. "The Exergy Costs of Electrical Power, Cooling, and Waste Heat from a Hybrid System Based on a Solid Oxide Fuel Cell and an Absorption Refrigeration System," Energies, MDPI, vol. 12(18), pages 1-15, September.
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    Cited by:

    1. Tomasz A. Prokop & Grzegorz Brus & Shinji Kimijima & Janusz S. Szmyd, 2020. "Thin Solid Film Electrolyte and Its Impact on Electrode Polarization in Solid Oxide Fuel Cells Studied by Three-Dimensional Microstructure-Scale Numerical Simulation," Energies, MDPI, vol. 13(19), pages 1-14, October.
    2. Tomasz A. Prokop & Grzegorz Brus & Janusz S. Szmyd, 2021. "Microstructure Evolution in a Solid Oxide Fuel Cell Stack Quantified with Interfacial Free Energy," Energies, MDPI, vol. 14(12), pages 1-14, June.

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