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Numerical Study on Electrochemical Performance of Low-Temperature Micro-Solid Oxide Fuel Cells with Submicron Platinum Electrodes

Author

Listed:
  • Jee Min Park

    (School of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea)

  • Dae Yun Kim

    (School of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea)

  • Jong Dae Baek

    (School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore)

  • Yong-Jin Yoon

    (School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore)

  • Pei-Chen Su

    (School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore)

  • Seong Hyuk Lee

    (School of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea)

Abstract

The present study established the two-dimensional axisymmetric model for a freestanding circular cell of the low-temperature micro-solid oxide fuel cell (µ-SOFC) that is composed of platinum (Pt) electrodes and a yttria-stabilized zirconia (YSZ) electrolyte. The only membrane electrode assembly (MEA) was constructed for the numerical simulation in order to avoid the meshing problem with a very high aspect ratio of the submicron layers. We considered the charge and species conservation equations and electrode kinetics to elucidate the intricate phenomena inside the µ-SOFC. The extensive numerical simulations were carried out by using the commercial code to predict the effect of operating temperature and electrolyte thickness on the electrochemical performance of µ-SOFC. Our numerical model was calibrated with the results from experiments, and we provided the average cell current density and overpotentials with respect to the electrolyte thickness and the operating temperature. It was found that the electrochemical performance increased with the increase in operating temperature, owing to both rapid electrochemical reactions and ionic conduction, even in µ-SOFC. Moreover, the major voltage loss of µ-SOFC at low-temperature was caused by the cathodic activation overpotential.

Suggested Citation

  • Jee Min Park & Dae Yun Kim & Jong Dae Baek & Yong-Jin Yoon & Pei-Chen Su & Seong Hyuk Lee, 2018. "Numerical Study on Electrochemical Performance of Low-Temperature Micro-Solid Oxide Fuel Cells with Submicron Platinum Electrodes," Energies, MDPI, vol. 11(5), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1204-:d:145368
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    References listed on IDEAS

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    1. Jee Min Park & Dae Yun Kim & Jong Dae Baek & Yong-Jin Yoon & Pei-Chen Su & Seong Hyuk Lee, 2018. "Effect of Electrolyte Thickness on Electrochemical Reactions and Thermo-Fluidic Characteristics inside a SOFC Unit Cell," Energies, MDPI, vol. 11(3), pages 1-15, February.
    2. Lee, Sanghyeok & Park, Mansoo & Kim, Hyoungchul & Yoon, Kyung Joong & Son, Ji-Won & Lee, Jong-Ho & Kim, Byung-Kook & Choi, Wonjoon & Hong, Jongsup, 2017. "Thermal conditions and heat transfer characteristics of high-temperature solid oxide fuel cells investigated by three-dimensional numerical simulations," Energy, Elsevier, vol. 120(C), pages 293-305.
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    Cited by:

    1. Daifen Chen & Biao Hu & Kai Ding & Cheng Yan & Liu Lu, 2018. "The Geometry Effect of Cathode/Anode Areas Ratio on Electrochemical Performance of Button Fuel Cell Using Mixed Conducting Materials," Energies, MDPI, vol. 11(7), pages 1-16, July.
    2. Denis A. Osinkin & Ekaterina P. Antonova & Alena S. Lesnichyova & Evgeniy S. Tropin & Mikhail E. Chernov & Efim I. Chernov & Andrey S. Farlenkov & Anna V. Khodimchuk & Vadim A. Eremin & Anastasia I. K, 2020. "Application of Promising Electrode Materials in Contact with a Thin-Layer ZrO 2 -Based Supporting Electrolyte for Solid Oxide Fuel Cells," Energies, MDPI, vol. 13(5), pages 1-12, March.
    3. Jae-Hyeong Yu & Chang-Whan Lee, 2020. "Effect of Cell Size on the Performance and Temperature Distribution of Molten Carbonate Fuel Cells," Energies, MDPI, vol. 13(6), pages 1-12, March.

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