Prasanna, M Ha, HY Cho, EA Hong, SA Oh, IH 2024-01-21T07:05:45Z 2024-01-21T07:05:45Z 2021-09-02 2004-05-14 0378-7753 https://pubs.kist.re.kr/handle/201004/137584 The influence of gas diffusion media (GDM), i.e. carbon paper, on PEMFCs was studied. The study was based on GDM thickness pore size distribution, air-permeability, electronic resistance and hydrophobicity. Cell performances were correlated with the physical properties of the GDM and reasonable agreements were made based on the oxygen-gain which was regarded as an index of mass transfer in the cathode when the reactant was changed from neat oxygen to air. The results show that gas permeability and pore size diameter of the GDM are the important factors in the performance of the cell compared to all other physical properties. When the mean pore size diameter is in the range of about 25-40 mum, thickness of the GDM and its gas permeability play crucial role in lowering oxygen-gain. GDM with larger pore size shows severe flooding in cathodes compared to GDM with smaller pore diameter. Optimized Teflon content in the GDM was found to be 20% whereas above this content gas permeability of the GDM decreased substantially due to decreased porosity. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV FUEL-CELLS MODEL Influence of cathode gas diffusion media on the performance of the PEMFCs Article 10.1016/j.jpowsour.2004.01.030 1 JOURNAL OF POWER SOURCES, v.131, no.1-2, pp.147 - 154 JOURNAL OF POWER SOURCES 131 1-2 147 154 scie scopus 000221418800021 2-s2.0-2342596594 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article; Proceedings Paper FUEL-CELLS MODEL proton exchange membrane fuel cells gas diffusion media oxygen-gain air-permeability pore size distribution hydrophobicity