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Effects of anisotropic bending stiffness of gas diffusion layers on the performance of polymer electrolyte membrane fuel cells with bipolar plates employing different channel depths

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  • Baik, Kyung Don
  • Hong, Bo Ki
  • Han, Kookil
  • Kim, Min Soo

Abstract

The effects of the anisotropic bending stiffness of gas diffusion layers (GDLs) on the performance of polymer electrolyte membrane fuel cells with metallic bipolar plates (MBPs), having different channel depths, are investigated. The current–voltage performance of fuel cells with 90° GDLs, whose directions of higher stiffness are perpendicular to the direction of the major flow field, is generally higher than that of cells with 0° GDLs, whose directions of higher stiffness are parallel to the direction of the major flow field. In the shallowest channel, the air pressure drop (ΔP) values of the 90° GDL cells are clearly lower than those of the 0° GDL cells, indicating less intrusion of the 90° GDL into the MBP channels. However, no significant difference appears between the air ΔP values of 0° and 90° GDL cells employing deeper channels. In comparison with other cells employing deeper channels, a dramatic increase in the high-frequency resistance of both the 0° and 90° GDL cells with the shallowest channel is unexpectedly observed, presumably due to the exceptional increase in the hydrogen and air pressure, which may cause more deformation and poor contact status of the GDLs in the cell. The cross-sectional images of GDLs upon compression indicate that the difference of blocked channel area between 0° and 90° GDL cells is much larger in the case of the shallowest channel, resulting in the observed air ΔP, whereas it is substantially negligible for the deepest channel.

Suggested Citation

  • Baik, Kyung Don & Hong, Bo Ki & Han, Kookil & Kim, Min Soo, 2014. "Effects of anisotropic bending stiffness of gas diffusion layers on the performance of polymer electrolyte membrane fuel cells with bipolar plates employing different channel depths," Renewable Energy, Elsevier, vol. 69(C), pages 356-364.
    • Handle: RePEc:eee:renene:v:69:y:2014:i:c:p:356-364
    DOI: 10.1016/j.renene.2014.03.060
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    References listed on IDEAS

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    1. Baik, Kyung Don & Hong, Bo Ki & Kim, Min Soo, 2013. "Effects of operating parameters on hydrogen crossover rate through Nafion® membranes in polymer electrolyte membrane fuel cells," Renewable Energy, Elsevier, vol. 57(C), pages 234-239.
    2. Ismail, M.S. & Ingham, D.B. & Ma, L. & Pourkashanian, M., 2013. "The contact resistance between gas diffusion layers and bipolar plates as they are assembled in proton exchange membrane fuel cells," Renewable Energy, Elsevier, vol. 52(C), pages 40-45.
    3. Baik, Kyung Don & Kong, Im Mo & Hong, Bo Ki & Kim, Sae Hoon & Kim, Min Soo, 2013. "Local measurements of hydrogen crossover rate in polymer electrolyte membrane fuel cells," Applied Energy, Elsevier, vol. 101(C), pages 560-566.
    4. Akbari, Mohammad Hadi & Rismanchi, Behzad, 2008. "Numerical investigation of flow field configuration and contact resistance for PEM fuel cell performance," Renewable Energy, Elsevier, vol. 33(8), pages 1775-1783.
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    Cited by:

    1. Kong, Im Mo & Choi, Jong Won & Kim, Sung Il & Lee, Eun Sook & Kim, Min Soo, 2015. "Experimental study on the self-humidification effect in proton exchange membrane fuel cells containing double gas diffusion backing layer," Applied Energy, Elsevier, vol. 145(C), pages 345-353.
    2. Baik, Kyung Don & Seo, Il Sung, 2018. "Metallic bipolar plate with a multi-hole structure in the rib regions for polymer electrolyte membrane fuel cells," Applied Energy, Elsevier, vol. 212(C), pages 333-339.

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