Development of a novel hydrophobic/hydrophilic double micro porous layer for use in a cathode gas diffusion layer in PEMFC |
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Authors: | Jeong Hwan ChunKi Tae Park Dong Hyun JoJi Young Lee Sang Gon KimSun Hee Park Eun Sook LeeJy-Young Jyoung Sung Hyun Kim |
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Affiliation: | a Department of Chemical and Biological Engineering, Korea University, 1, 5Ka Anam-Dong, Seongbuk-Ku, Seoul 136-713, Republic of Korea b Energy Research Center, HyupJin I&C Co., LTD, 143-1 Gwelang-Ri, Jungnam-Myun, Hwasung-Si, Kyunggi-Do, Republic of Korea |
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Abstract: | In this study, a gas diffusion layer (GDL) was modified to improve the water management ability of a proton exchange membrane fuel cell (PEMFC). We developed a novel hydrophobic/hydrophilic double micro porous layer (MPL) that was coated on a gas diffusion backing layer (GDBL). The water management properties, vapor and water permeability, of the GDL were measured and the performance of single cells was evaluated under two different humidification conditions, R.H. 100% and 50%. The modified GDL, which contained a hydrophilic MPL in the middle of the GDL and a hydrophobic MPL on the surface, performed better than the conventional GDL, which contained only a single hydrophobic MPL, regardless of humidity, where the performance of the single cell was significantly improved under the low humidification condition. The hydrophilic MPL, which was in the middle of the modified GDL, was shown to act as an internal humidifier due to its water absorption ability as assessed by measuring the vapor and water permeability of this layer. |
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Keywords: | Polymer electrolyte membrane fuel cell (PEMFC) Gas diffusion layer (GDL) Micro porous layer (MPL) Hydrophobic/hydrophilic double layer |
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