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Effect of the pore size variation in the substrate of the gas diffusion layer on water management and fuel cell performance

Author

Listed:
  • Park, Jaeman
  • Oh, Hwanyeong
  • Lee, Yoo Il
  • Min, Kyoungdoug
  • Lee, Eunsook
  • Jyoung, Jy-Young

Abstract

The gas diffusion layer (GDL) is a key component of a proton exchange membrane (PEM) fuel cell due to its role as a pathway for fuel, air, and water. GDL determines the mass balance and water management in the PEM fuel cell. Thus, an investigation of the optimal structural characteristics of the GDL with improved water management is important to ensure high performance of the PEM fuel cell. In this study, a PEM fuel cell model that considers the structural characteristics of GDL is developed, and the various the GDL structural characteristics are analyzed and validated. Specifically, the effects of pore size variation in the substrate of the GDL on water management and cell performance are investigated. Two GDL samples with different pore sizes are evaluated according to the porosity, pore size, thickness, and internal contact angle to understand the basic structural characteristics of the GDL. The GDL structural parameters with the basic characteristics are incorporated into the developed model. The cell performance is predicted to be relative to the two-phase mass transport inside the GDL. The characteristics of the micro-porous layer (MPL) and MPL penetration part are found to be affected by the variation in the macro-pore size of the substrate. The water management capability of the GDL varies with these differences with respect to water retention and removal characteristics. Under the condition of relative humidity (RH) 100%, the averaged saturation value of the MPL and MPL penetration part of the GDL with small macro-pore in the substrate is 18.8% higher than that of the GDL with large macro-pore in the substrate. The cell performance is also affected by the operating conditions of relative humidity and current load. The voltage of the GDL with small macro-pore in the substrate at the current density of 1.6A/cm2 is 10.3% lower than that of the GDL with large macro-pore in the substrate under RH 100%.

Suggested Citation

  • Park, Jaeman & Oh, Hwanyeong & Lee, Yoo Il & Min, Kyoungdoug & Lee, Eunsook & Jyoung, Jy-Young, 2016. "Effect of the pore size variation in the substrate of the gas diffusion layer on water management and fuel cell performance," Applied Energy, Elsevier, vol. 171(C), pages 200-212.
    • Handle: RePEc:eee:appene:v:171:y:2016:i:c:p:200-212
    DOI: 10.1016/j.apenergy.2016.02.132
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    References listed on IDEAS

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    1. Cho, Junhyun & Park, Jaeman & Oh, Hwanyeong & Min, Kyoungdoug & Lee, Eunsook & Jyoung, Jy-Young, 2013. "Analysis of the transient response and durability characteristics of a proton exchange membrane fuel cell with different micro-porous layer penetration thicknesses," Applied Energy, Elsevier, vol. 111(C), pages 300-309.
    2. Pratt, Joseph W. & Klebanoff, Leonard E. & Munoz-Ramos, Karina & Akhil, Abbas A. & Curgus, Dita B. & Schenkman, Benjamin L., 2013. "Proton exchange membrane fuel cells for electrical power generation on-board commercial airplanes," Applied Energy, Elsevier, vol. 101(C), pages 776-796.
    3. Ismail, M.S. & Hughes, K.J. & Ingham, D.B. & Ma, L. & Pourkashanian, M., 2012. "Effects of anisotropic permeability and electrical conductivity of gas diffusion layers on the performance of proton exchange membrane fuel cells," Applied Energy, Elsevier, vol. 95(C), pages 50-63.
    4. Oh, Hwanyeong & Park, Jaeman & Min, Kyoungdoug & Lee, Eunsook & Jyoung, Jy-Young, 2015. "Effects of pore size gradient in the substrate of a gas diffusion layer on the performance of a proton exchange membrane fuel cell," Applied Energy, Elsevier, vol. 149(C), pages 186-193.
    5. Wang, Yun & Chen, Ken S. & Mishler, Jeffrey & Cho, Sung Chan & Adroher, Xavier Cordobes, 2011. "A review of polymer electrolyte membrane fuel cells: Technology, applications, and needs on fundamental research," Applied Energy, Elsevier, vol. 88(4), pages 981-1007, April.
    6. Hosseinzadeh, Elham & Rokni, Masoud & Rabbani, Abid & Mortensen, Henrik Hilleke, 2013. "Thermal and water management of low temperature Proton Exchange Membrane Fuel Cell in fork-lift truck power system," Applied Energy, Elsevier, vol. 104(C), pages 434-444.
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