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Study on the Optimization of Superhydrophobic Coating for the Durability of Gas Diffusion Layer in Alkaline Fuel Cells

알카라인 연료전지 가스확산층 내구성 향상을 위한 초발수 코팅 최적화 연구

  • Kim, Soong Yeon (Plant Engineering Center, Institute for Advanced Engineering) ;
  • Seo, Minhye (Plant Engineering Center, Institute for Advanced Engineering) ;
  • Uhm, Sunghyun (Plant Engineering Center, Institute for Advanced Engineering)
  • 김숭연 (고등기술연구원 플랜트엔지니어링센터) ;
  • 서민혜 (고등기술연구원 플랜트엔지니어링센터) ;
  • 엄성현 (고등기술연구원 플랜트엔지니어링센터)
  • Received : 2017.09.07
  • Accepted : 2017.10.18
  • Published : 2017.12.10

Abstract

Optimization study was carried out to improve the durability of the gas diffusion layer (GDL) in alkaline fuel cell cathode by the use of highly stable PDMS superhydrophobic coating. Two different commercial GDLs were selected as substrates. Coating temperature and viscosity of PDMS were controlled for the stability of structure in microporous layer of GDL as well as uniform coating according to thermal characteristics of GDL. Regardless of PDMS viscosity, highly stable superhydrophobicities were obtained with both GDLs at $200^{\circ}C$. After the accelerated test, however, 28BC GDL coated with 1000 CS PDMS showed the best durability with the lowest loss of superhydrophobicity.

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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