標題: Water permeation analysis on gas diffusion layers of proton exchange membrane fuel cells for Teflon-coating annotation
作者: Chou, Yen-I
Siao, Zih-Yuan
Chen, Yu-Feng
Sung, Lung-Yu
Yang, Wen-Mei
Wang, Chi-Chuan
機械工程學系
Department of Mechanical Engineering
關鍵字: Proton exchange membrane fuel cells;Gas diffusion layer;Hydrophobic;Water permeation;Water flooding;Polytetrafluoroethylene
公開日期: 15-一月-2010
摘要: This study presents an analysis of water permeation of a polytetrafluoroethylene (PTFE)-coated gas diffusion layer (GDL) to determine the influence of hydrophobic treatment on the GDL for diagnosis of water flooding. It is found that the behaviour of water drainage is controlled by the pore configuration instead of the hydrophobicity in GDL. Better water drainage is achieved by the action of the Teflon coating in modulating the GDL pore configuration to give both a larger average pore size and a wider distribution of pore size. The results show that water penetration through the GDL must overcome a threshold surface tension defined by the largest pore range. A 30 wt.% PTFE coating of a GDL is shown to generate a satisfactory pore configuration, explaining the improved cell polarization performance with a lower driven pressure (similar to 1.91 kPa) and a higher rate of water drainage. (C) 2009 Elsevier B. V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jpowsour.2009.07.049
http://hdl.handle.net/11536/5969
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2009.07.049
期刊: JOURNAL OF POWER SOURCES
Volume: 195
Issue: 2
起始頁: 536
結束頁: 540
顯示於類別:期刊論文


文件中的檔案:

  1. 000272883300023.pdf