Real-time visualization of oxygen partial pressures in straight channels of running polymer electrolyte fuel cell with water plugging

Katsuya Nagase, Takeo Suga, Yuzo Nagumo, Makoto Uchida, Junji Inukai, Hiroyuki Nishide, Masahiro Watanabe

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    (Figure Presented). Visualization inside polymer electrolyte fuel cells (PEFCs) for elucidating the reaction distributions is expected to improve the performance, durability, and stability. An oxygen-sensitive film of a luminescent porphyrin was used to visualize the oxygen partial pressures in five straight gas-flow channels of a running PEFC with liquid-water blockages formed at the end of the channels. The blockage greatly lowered and unstabilized the cell voltage. The oxygen partial pressure decreased nearly to 0 kPa in the blocked channel. With a water blockage in a channel, the oxygen partial pressures in the adjacent channels were lowered due to an extra demand of oxygen consumption. When the number of the blocked channels increased, the oxygen partial pressure in the unblocked channels became much lowered. When the water blockages disappeared, the oxygen partial pressures quickly returned to the values before plugging. The influence of the cross flows of air through the gas diffusion layers in straight channels was much smaller than that in serpentine flow channels.

    Original languageEnglish
    Pages (from-to)873-877
    Number of pages5
    JournalJournal of Power Sources
    Volume273
    DOIs
    Publication statusPublished - 2015 Jan 1

    Fingerprint

    plugging
    Partial pressure
    Electrolytes
    fuel cells
    partial pressure
    Fuel cells
    Polymers
    Visualization
    electrolytes
    Oxygen
    Water
    polymers
    oxygen
    water
    oxygen consumption
    Diffusion in gases
    Porphyrins
    Channel flow
    cross flow
    gaseous diffusion

    Keywords

    • Cross flow
    • Gas diffusion layer
    • Gas-flow channel
    • Oxygen partial pressure
    • Polymer electrolyte fuel cell
    • Water blockage

    ASJC Scopus subject areas

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

    Cite this

    Real-time visualization of oxygen partial pressures in straight channels of running polymer electrolyte fuel cell with water plugging. / Nagase, Katsuya; Suga, Takeo; Nagumo, Yuzo; Uchida, Makoto; Inukai, Junji; Nishide, Hiroyuki; Watanabe, Masahiro.

    In: Journal of Power Sources, Vol. 273, 01.01.2015, p. 873-877.

    Research output: Contribution to journalArticle

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    AU - Suga, Takeo

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    AU - Uchida, Makoto

    AU - Inukai, Junji

    AU - Nishide, Hiroyuki

    AU - Watanabe, Masahiro

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    N2 - (Figure Presented). Visualization inside polymer electrolyte fuel cells (PEFCs) for elucidating the reaction distributions is expected to improve the performance, durability, and stability. An oxygen-sensitive film of a luminescent porphyrin was used to visualize the oxygen partial pressures in five straight gas-flow channels of a running PEFC with liquid-water blockages formed at the end of the channels. The blockage greatly lowered and unstabilized the cell voltage. The oxygen partial pressure decreased nearly to 0 kPa in the blocked channel. With a water blockage in a channel, the oxygen partial pressures in the adjacent channels were lowered due to an extra demand of oxygen consumption. When the number of the blocked channels increased, the oxygen partial pressure in the unblocked channels became much lowered. When the water blockages disappeared, the oxygen partial pressures quickly returned to the values before plugging. The influence of the cross flows of air through the gas diffusion layers in straight channels was much smaller than that in serpentine flow channels.

    AB - (Figure Presented). Visualization inside polymer electrolyte fuel cells (PEFCs) for elucidating the reaction distributions is expected to improve the performance, durability, and stability. An oxygen-sensitive film of a luminescent porphyrin was used to visualize the oxygen partial pressures in five straight gas-flow channels of a running PEFC with liquid-water blockages formed at the end of the channels. The blockage greatly lowered and unstabilized the cell voltage. The oxygen partial pressure decreased nearly to 0 kPa in the blocked channel. With a water blockage in a channel, the oxygen partial pressures in the adjacent channels were lowered due to an extra demand of oxygen consumption. When the number of the blocked channels increased, the oxygen partial pressure in the unblocked channels became much lowered. When the water blockages disappeared, the oxygen partial pressures quickly returned to the values before plugging. The influence of the cross flows of air through the gas diffusion layers in straight channels was much smaller than that in serpentine flow channels.

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