Water management in PEMFCs using absorbent wicks

Shanhai Ge, Xu Guang Li, I. Ming Hsing

    Research output: Contribution to journalArticle

    52 Citations (Scopus)

    Abstract

    A water management strategy for polymer electrolyte membrane fuel cells (PEMFCs) using different kinds of absorbent wicks was investigated. Through this technology, water produced by the electrochemical reaction is transported to the inlet region of the reactant gas and used to humidify the dry reactant gas on the cathode side. For the thin membrane (Nation 112) used, the back-diffusion of water from the cathode to the anode is sufficient to humidify dry hydrogen and to prevent drying out of the anode in the counterflow mode. Due to an improved water distribution in the whole region of the cell, PEMFC with superabsorbent wicks can be operated without external humidification of the reactant gases and still outperform the common one without wicks operated with dry or humidified gases. The performance of the cell with superabsorbent sponge was stable under high-current-density conditions (I/ = 1.2 A/cm2), and little performance degradation was observed over a 120 h investigation period when both dry hydronen and dry air were fed.

    Original languageEnglish (US)
    JournalJournal of the Electrochemical Society
    Volume151
    Issue number9
    DOIs
    StatePublished - 2004

    Fingerprint

    water management
    wicks
    Water management
    absorbents
    Proton exchange membrane fuel cells (PEMFC)
    fuel cells
    Gases
    electrolytes
    membranes
    polymers
    gases
    Water
    Anodes
    Cathodes
    anodes
    cathodes
    water
    counterflow
    cells
    drying

    All Science Journal Classification (ASJC) codes

    • Electrochemistry
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

    Cite this

    Ge, Shanhai ; Li, Xu Guang ; Hsing, I. Ming. / Water management in PEMFCs using absorbent wicks. In: Journal of the Electrochemical Society. 2004 ; Vol. 151, No. 9.
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    Water management in PEMFCs using absorbent wicks. / Ge, Shanhai; Li, Xu Guang; Hsing, I. Ming.

    In: Journal of the Electrochemical Society, Vol. 151, No. 9, 2004.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Water management in PEMFCs using absorbent wicks

    AU - Ge, Shanhai

    AU - Li, Xu Guang

    AU - Hsing, I. Ming

    PY - 2004

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    N2 - A water management strategy for polymer electrolyte membrane fuel cells (PEMFCs) using different kinds of absorbent wicks was investigated. Through this technology, water produced by the electrochemical reaction is transported to the inlet region of the reactant gas and used to humidify the dry reactant gas on the cathode side. For the thin membrane (Nation 112) used, the back-diffusion of water from the cathode to the anode is sufficient to humidify dry hydrogen and to prevent drying out of the anode in the counterflow mode. Due to an improved water distribution in the whole region of the cell, PEMFC with superabsorbent wicks can be operated without external humidification of the reactant gases and still outperform the common one without wicks operated with dry or humidified gases. The performance of the cell with superabsorbent sponge was stable under high-current-density conditions (I/ = 1.2 A/cm2), and little performance degradation was observed over a 120 h investigation period when both dry hydronen and dry air were fed.

    AB - A water management strategy for polymer electrolyte membrane fuel cells (PEMFCs) using different kinds of absorbent wicks was investigated. Through this technology, water produced by the electrochemical reaction is transported to the inlet region of the reactant gas and used to humidify the dry reactant gas on the cathode side. For the thin membrane (Nation 112) used, the back-diffusion of water from the cathode to the anode is sufficient to humidify dry hydrogen and to prevent drying out of the anode in the counterflow mode. Due to an improved water distribution in the whole region of the cell, PEMFC with superabsorbent wicks can be operated without external humidification of the reactant gases and still outperform the common one without wicks operated with dry or humidified gases. The performance of the cell with superabsorbent sponge was stable under high-current-density conditions (I/ = 1.2 A/cm2), and little performance degradation was observed over a 120 h investigation period when both dry hydronen and dry air were fed.

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