Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Multi-Layered Sintered Porous Transport Layers in Alkaline Water Electrolysis

다층 소결메쉬 확산체를 이용한 알칼라인 수전해 셀

  • YEOM, SANG HO (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • YUN, YOUNG HWA (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • CHOI, SEUNGWOOK (Platform Technology Laboratory, Korea Institute of Energy Research) ;
  • KWON, JIHEE (Platform Technology Laboratory, Korea Institute of Energy Research) ;
  • LEE, SECHAN (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • LEE, JAE HUN (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • LEE, CHANGSOO (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • KIM, MINJOONG (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • KIM, SANG-KYUNG (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • UM, SUKKEE (Department of Mechanical Engineering, Hanyang University) ;
  • KIM, CHANG-HEE (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • CHO, WON CHUL (Hydrogen Research Department, Korea Institute of Energy Research) ;
  • CHO, HYUN-SEOK (Hydrogen Research Department, Korea Institute of Energy Research)
  • 염상호 (한국에너지기술연구원 수소연구단) ;
  • 윤영화 (한국에너지기술연구원 수소연구단) ;
  • 최승욱 (한국에너지기술연구원 플랫폼연구실) ;
  • 권지희 (한국에너지기술연구원 플랫폼연구실) ;
  • 이세찬 (한국에너지기술연구원 수소연구단) ;
  • 이재훈 (한국에너지기술연구원 수소연구단) ;
  • 이창수 (한국에너지기술연구원 수소연구단) ;
  • 김민중 (한국에너지기술연구원 수소연구단) ;
  • 김상경 (한국에너지기술연구원 수소연구단) ;
  • 엄석기 (한양대학교 기계공학부) ;
  • 김창희 (한국에너지기술연구원 수소연구단) ;
  • 조원철 (한국에너지기술연구원 수소연구단) ;
  • 조현석 (한국에너지기술연구원 수소연구단)
  • Received : 2021.10.02
  • Accepted : 2021.12.10
  • Published : 2021.12.30
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Abstract

The porous transport layer (PTL) is essential to effectively remove oxygen and hydrogen gas from the electrode surface at high current density operation conditions. In this study, the effect of PTL with different characteristics such as pore size, pore gradient, interfacial coating was investigated by multi-layered sintered mesh. A water electrolysis single cell of active area of the 34.56 cm2 was constructed, and IV performance and impedance analysis were conducted in the range of 0 to 2.0 A/cm2. It was confirmed that the multi-layered sintered mesh PTL, which have an average pore size of 25 to 57 ㎛ and a larger pore gradient, removed bubbles effectively and thus seemed to improve IV performance. Also, it was confirmed that the catalytic metals such as Ni, NiMo coating on the PTL reduced activation overpotential, but increased mass transport overpotential.

Keywords

Acknowledgement

The authors gratefully acknowledge partial financial support for this work by the Hydrogen Energy Innovation Technology Development Program of the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2019M3E6A1064020). This research was also supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of Korea (20203030040030).

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