Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Porometric Study on the Gas Diffusion Layer in PEMFCs Using Method of Standard Porosimetry

MSP 기법을 적용한 고분자 전해질 연료전지 가스확산층의 포로시메트리 연구

  • Lee, Yongtaek (Department of Mechanical Engineering, Hannam University)
  • Received : 2012.07.09
  • Published : 2013.02.10
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Abstract

The structure of pore network of gas diffusion layers (GDLs) in PEMFCs plays a critical role in determining the transport phenomena of reaction gas as well as generated water. In addition, the interactive characteristics between water and surface of pore are no less important than the structural characteristics of pore network. In this study, porometric investigation is conducted for two kinds of GDL using method of standard porosimetry which enable to distinguish hydrophobic pores from hydrophilic pores of GDLs. The porosity of TGPH-120 decreases by 6% by adding 30 wt.% of PTFE, but the porosity of hydrophilic pores decreases by 12%. The relation of $p_c-S_{nw}$ varies with the addition of PTFE, especially at low $p_c$.

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References

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