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Microstructure Evolution in a Solid Oxide Fuel Cell Stack Quantified with Interfacial Free Energy

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)

  • Grzegorz Brus

    (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)

Abstract

Degradation of electrode microstructure is one of the key factors affecting long term performance of Solid Oxide Fuel Cell systems. Evolution of a multiphase system can be described quantitatively by the change in its interfacial energy. In this paper, we discuss free energy of a microstructure to showcase the anisotropy of its evolution during a long-term performance experiment involving an SOFC stack. Ginzburg Landau type functional is used to compute the free energy, using diffuse phase distributions based on Focused Ion Beam Scanning Electron Microscopy images of samples taken from nine different sites within the stack. It is shown that the rate of microstructure evolution differs depending on the position within the stack, similar to phase anisotropy. However, the computed spatial relation does not correlate with the observed distribution of temperature.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3476-:d:573491
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    References listed on IDEAS

    as
    1. 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.
    2. Yaohao Guo & Lei Zhang & Guangpu Zhu & Jun Yao & Hai Sun & Wenhui Song & Yongfei Yang & Jianlin Zhao, 2019. "A Pore-Scale Investigation of Residual Oil Distributions and Enhanced Oil Recovery Methods," Energies, MDPI, vol. 12(19), pages 1-16, September.
    3. Swastibrata Bhattacharyya & Ryoji Sahara & Kaoru Ohno, 2019. "A first-principles phase field method for quantitatively predicting multi-composition phase separation without thermodynamic empirical parameter," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
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    Cited by:

    1. Siyu Lu & Man Zhang & Jie Wu & Wei Kong, 2022. "Performance Investigation on Mono-Block-Layer Build Type Solid Oxide Fuel Cells with a Vertical Rib Design," Energies, MDPI, vol. 15(3), pages 1-12, January.

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