Estimation of flooding in PEMFC gas diffusion layer by differential pressure measurement

Kohei Ito, Kensuke Ashikaga, Hiromitsu Masuda, Toshihiro Oshima, Yasushi Kakimoto, Kazunari Sasaki

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The flooding, especially in gas diffusion layer (GDL), is one of the critical issues to put PEMFC to practical use. However, the experimental data of the flooding in GDL is so insufficient that the optimization design related to the water management for GDL has not established. In this study we developed a method to estimate the water saturation, namely the ratio of liquid water to pore volume in GDL. We fabricated a simple interdigitated cell where the supply gas is enforced to flow under rib. This structure enables to estimate the liquid water ratio in GDL by the measurement of differential pressure through the cell. We operated the cell and measured the differential pressure, and succeeded in estimating the water saturation, which changed largely with changing cell operation condition. In addition to this deferential pressure measurement, we measured the ionic resistance in polymer electrolyte membrane by ac impedance method. We evaluated and discussed the influence of the water saturation on cell voltage.

Original languageEnglish
Pages (from-to)732-738
Number of pages7
JournalJournal of Power Sources
Volume175
Issue number2
DOIs
Publication statusPublished - Jan 10 2008

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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