Water Repellent Coating of GDL with Different Concentration of Nano-sized PTFE Solution

나노사이즈 불화탄소수지 용액 농도에 따른 GDL 발수 코팅

  • Jeong, Moon-Gook (Grad. School of Applied Chemistry Engineering, Dankook Univ.) ;
  • Song, Ki-Se (Grad. School of Chemical & Biochemical Engineering, Dongguk Univ.) ;
  • Cho, Tae-Hwan (Grad. School of Applied Chemistry Engineering, Dankook Univ.) ;
  • Choi, Weon-Kyung (School of Engineering, Dankook Univ.)
  • 정문국 (단국대학교 응용화학공학과 대학원) ;
  • 송기세 (동국대학교 화공생물공학과 대학원) ;
  • 조태환 (단국대학교 응용화학공학과 대학원) ;
  • 최원경 (단국대학교 공학대학)
  • Published : 2009.08.30

Abstract

Efficiency of a fuel cell is determined by the generated water. If water is not removed sufficiently, water will be accumulated at GDL, which causes flooding. Therefore, water control is regarded as a crucial factor to sustain fuel ell performance. In this study, PTFE coating on the surface of carbon paper was carried out to establish optimum process for hydrophobic treatment of GDL. Carbon paper was immersed at different concentrations of nano-sized PTFE coating solution. Their characteristics were analyzed systematically by FE-SEM, water contact angle, cyclic voltamogam, XRD and FT-IR. The quantitative correlation between the amount of coated-PTFE on a carbon paper and concentration of coating solution was carefully investigated. It is suggested that the amount of PTFE-coating on a carbon paper can be managed by means of controling concentration of coating solution.

Keywords

References

  1. A. Kirubakaran, Shailendra Jain, R.K Nema : 'A review on fuel cell technologies and power electronic interface', Renewable and Sustainable Energy Reviews, Article in press
  2. Atilla Bi.yi.koglu : 'Review of proton exchange membrane fuel cell models', International Journal of Hydrogen Energy, Vol. 30, 2005, pp. 1181-1212 https://doi.org/10.1016/j.ijhydene.2005.05.010
  3. James Larminie, Andrew Dicks : 'Fuel Cell System Explained(second edition)', Wiley, England, 2003, pp. 67-94
  4. Hui Li, Yanghua Tang, Zhenwei Wang, Zheng Shi, Shaohong Wu, Datong Song, Jianlu Zhang, Khalid Fatih, Jiujun Zhang, Haijiang Wang: 'A review of water flooding issues in the proton exchange membrane fuel cell', Journal of Power Sources, Vol. 178, 2008, pp. 103-117 https://doi.org/10.1016/j.jpowsour.2007.12.068
  5. L. Cindrella, A.M. Kannana., I.F. Lin, K. Saminathan, Y. Ho, C.W. Lin, I Wertz : 'Gas diffusion layer for proton exchange membrane fuel cells- A review', Journal of Power Sources, Article in press
  6. L. Giorgi, E. Antolini, A Pozio, E. Passalacqua : 'Influence of the PTFE content in the diffusion layer of low-Pt loading electrodes for polymer electrolyte fuel cells', Electrochimica Acta, Vol. 43, 1998, pp. 3675-3680 https://doi.org/10.1016/S0013-4686(98)00125-X
  7. Gu-Gon Park, Young-Jun Sohn, Tae-Hyun Yang, Young-Gi Yoon, Won-Yong Lee, Chang-Soo Kim : 'Effect of PTFE contents in the gas diffusion media on the performance of PEMFC', Journal of Power Sources, Vol. 131, 2004, pp. 182-187 https://doi.org/10.1016/j.jpowsour.2003.12.037
  8. K.-F. Chiu, K.W. Wang: 'Hydrophobic coating on carbon electrodes for proton exchange membrane fuel cells', Surface & Coating Technology, Vol. 202, 2007, pp. 1231-1235 https://doi.org/10.1016/j.surfcoat.2007.07.064
  9. Ugur PasaogullariC. Y. Wang: 'Liquid Water Transport in Gas Diffusion Layer of Polymer Electrolyte Fuel Cells', Journal of The Electrochemical Society, Vol 151, 2004, pp. A399-A406 https://doi.org/10.1149/1.1646148
  10. Vladimir Gurau, Michael J. Bluemle, Emory S. De Castro, Yu-Min Tsou, J. Adin Mann Jr., Thomas A. Zawodzinski Jr. : 'Characterization of transport properties in gas diffusion layers for proton exchange membrane fuel cells J. Wettability (internal contact angle to water and surface energy of GDL fibers)', Journal of Power Sources, Vol. 160, 2006, pp. 1156-1162 https://doi.org/10.1016/j.jpowsour.2006.03.016
  11. Jiang L, Eve S. S, Senthil Sill, Weijie L, Charles M. Lukehart: 'Carbon nanofibers 'spot-welded' to carbon paper by carbothermal reduction : A nanomicro-scale hierarchical architecture having low contact resistance.', Chem. Mater, Vol. 19, 2007, pp. 6001-6006 https://doi.org/10.1021/cm701996n
  12. Jong Hyeok Park and O Ok Park : 'Morphology and electrochemical behaviour of rutheniurn oxide thin film deposited on carbon paper', Journal of Power Sources, Vol. 109, 2002, pp. 121-126 https://doi.org/10.1016/S0378-7753(02)00053-8
  13. Jielong S, Guozhong W, Yaodong L, Hongyan Z. : 'Study on polytetrafluoroethylene aqueous dispersion irradiated by gamma ray.', J Fluorine Chemistry, Vol. 127, 2006, pp. 91-96 https://doi.org/10.1016/j.jfluchem.2005.10.005
  14. Francisco A, Enric B, Pere-Lluis C. : 'Impedance study of the evolution of a $H_2O$-generationg hydrophobic gas diffusion electrode', Electrochemistry Commmication, Vol. 4, 2002, pp. 838-43 https://doi.org/10.1016/S1388-2481(02)00464-2