Effects of humidification temperatures on local current characteristics in a PEM fuel cell

Hong Sun, Guangsheng Zhang, Lie Jin Guo, Shang Dehua, Hongtan Liu

    Research output: Contribution to journalArticlepeer-review

    60 Scopus citations


    It is well known that water plays a very important role in the performance of proton exchange membrane (PEM) fuel cells. Non-uniform water content in the membrane leads to non-uniform ionic resistance, and non-uniform liquid water fraction in the porous electrode causes varied mass transfer resistances. The objective of this work is to study the effects of different anode and cathode humidification temperatures on local current densities of a PEM fuel cell with a co-flow serpentine flow field. The method used is the current distribution measurement gasket technique [H. Sun, G.S. Zhang, L.J. Guo, H. Liu, J. Power Sources 158 (2006) 326-332]. The experimental results show that both air and the hydrogen need to be humidified to ensure optimal cell performance, and too high or too low humidification temperature can cause severe non-uniform distribution of local current density. From the experimental results of local current density distributions, the local membrane hydration, the optimal humidification temperature, and if flooding occurs can be obtained. Such detailed local measurement results could be very valuable in fuel cell design and operation optimizations.

    Original languageEnglish (US)
    Pages (from-to)400-407
    Number of pages8
    JournalJournal of Power Sources
    Issue number2
    StatePublished - Jun 1 2007

    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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