Demonstration of water management role of microporous layer by similarity model experiments

Jung Ho Kang, Kyu Jin Lee, Seung Ho Yu, Jin Hyun Nam, Charn Jung Kim

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The water management role of a microporous layer (MPL) in a polymer electrolyte membrane fuel cell (PEMFC) is demonstrated experimentally by visualizing the drainage behaviors of a non-wetting fluid through multiple porous layers. An intermediate layer inserted between a fine layer and a coarse layer is observed to reduce the number of (the non-wetting fluid) breakthrough sites towards the coarse layer by merging many transport paths. Then, the reduced number of the breakthrough sites decreases the non-wetting fluid saturation in the coarse layer by minimizing capillary fingering process. These results clearly demonstrate the water management role of an MPL: An MPL reduces the liquid water breakthrough into a gas diffusion layer (GDL) by merging many paths from a catalyst layer (CL), and thereby reduces the liquid water saturation in the GDL.

Original languageEnglish
Pages (from-to)4264-4269
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number9
DOIs
Publication statusPublished - 2010 May
Externally publishedYes

Keywords

  • Flow visualization
  • Invasion-percolation
  • Liquid water breakthrough
  • Microporous layer
  • Similarity model experiment
  • Water management

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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