Oxygen partial pressures on gas-diffusion layer surface and gas-flow channel wall in polymer electrolyte fuel cell during power generation studied by visualization technique combined with numerical simulation

Yuta Ishigami, Wihatmoko Waskitoaji, Masakazu Yoneda, Kenji Takada, Tsuyoshi Hyakutake, Takeo Suga, Makoto Uchida, Yuzo Nagumo, Junji Inukai, Hiroyuki Nishide, Masahiro Watanabe

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    11 Citations (Scopus)

    Abstract

    Visualization of the oxygen partial pressures was carried out at the surface of a gas diffusion layer (GDL) for the first time together with the upper part of the gas-flow channel of the cathode of a running polymer electrolyte fuel cell (PEFC) using two different oxygen-sensitive luminescent dye films. The visualized distributions of the oxygen partial pressures at the GDL and the upper gas-flow channel during the PEFC operation were very different in a conventional test cell. The change in the distribution of the oxygen partial pressures was observed by changing the oxygen utilization, which should be connected with the reactive locations in the membrane-electrode assembly (MEA). A numerical calculation was carried out to understand the distributions of water and current density inside the MEA. The water distribution inside the MEA was confirmed to strongly affect the distributions of the current density and the oxygen /partial pressure.

    Original languageEnglish
    Pages (from-to)556-564
    Number of pages9
    JournalJournal of Power Sources
    Volume269
    DOIs
    Publication statusPublished - 2014 Dec 10

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    Keywords

    • Gas diffusion layer
    • Gas-flow channel
    • Numerical modeling
    • Oxygen reduction reaction
    • Polymer electrolyte fuel cell
    • Visualization of oxygen partial pressure

    ASJC Scopus subject areas

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

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