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저 가습에서 유리한 고분자 전해질 연료전지용 자가 가습 전극 개발

Self-Humidifying Electrodes at Low Humidity for Polymer Electrolyte Membrane Fuel Cells (PEMFCs)

  • Kim, Eunyoung (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Yim, Sungdae (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Bae, Byungchan (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Yang, Taehyun (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Park, Seokhee (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Choi, Hosuk ( Department of Chemical Engineering, Chungnam National University)
  • 발행 : 20150000

초록

Excessive humidity within polymer electrolyte membrane fuel cells (PEMFCs) interrupts the flow of reactant gases, ultimately leading to substantial reduced performance. Also, low levels of water in the electrode result in an increased ohmic resistance due to membrane drying at low humidity levels. In this study, a self-humidifying electrode was prepared by adding a hydrophilic polymer, polyvinyl alcohol (PVA), to the catalyst layer. Glutaraldehyde (GA) was employed as a crosslinking agent to prevent washing of PVA during cell operation. Non-crosslinked hydroxyl groups of PVA assist in the retention of water from the reactant gas. Improvement of the initial performance and durability is predicted at low humidity levels. Due to their water-absorbing characteristics, the novel electrodes are appropriate for applications to self-humidifying MEA.

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피인용 문헌

  1. Decal Transfer Method of Hydrocarbon Membranes for Fabricating a Membrane Electrode Assembly (MEA) vol.13, pp.3, 2017, https://doi.org/10.7849/ksnre.2017.9.13.3.051