Numerical study on the cathode flooding of direct humidified proton exchange membrane fuel cell

Hirata, Haruhiko; Shimotori, Soichiro; Aoki, Tsutomu

doi:10.1016/j.jpowsour.2012.04.100

Cited by 3 publications

(2 citation statements)

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“…Because the water management is very effective to the cell performance, numerous research groups [1][2][3][4][5][6][7] have focused on implementation of the cathode flooding to gain insights through the MEA. In detail, the membrane electrode assembly (MEA) should be hydrated to preserve high proton conductivity, whereas the space possessed by liquid water flooding needs to be minimized to facilitate fuel or oxidizer transport from flow channel to catalytic surface.…”

Section: Introductionmentioning

confidence: 99%

“…In detail, the membrane electrode assembly (MEA) should be hydrated to preserve high proton conductivity, whereas the space possessed by liquid water flooding needs to be minimized to facilitate fuel or oxidizer transport from flow channel to catalytic surface. Because the water management is very effective to the cell performance, numerous research groups [1][2][3][4][5][6][7] have focused on implementation of the cathode flooding to gain insights through the MEA. Meanwhile, others conducted the anode modeling to predict key variables related to the flooded agglomerate electrodes [8,9], however, the water flooding was not a concern.…”

Section: Introductionmentioning

confidence: 99%

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Computational modeling of proton exchange membrane fuel cells including gas-crossover behavior

Jung

Kim

Yoon

et al. 2013

Int. J. Energy Res.

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SUMMARY In a typical proton exchange membrane fuel cell (PEMFC), Nafion, i.e. a typical proton‐exchange membrane, allows to permeate hydrogen and oxygen to the opposite electrode, resulting in unexpected parasitic reaction, and reduces open circuit potential (OCP) because of undesirable potential mixing. This paper investigates the influences of the anode flooding and fuel starvation on cell performance under mixed‐potential conditions. A two‐dimensional computational fluid dynamics model was formulated by considering direct oxidation reaction when hydrogen and oxygen molecules meet to account additional water generation in both anode and cathode catalyst layers. The present model was validated by comparing the simulated cell polarization with experimentally measured cell polarization. The authors have prepared membrane electrode assembly by the decal transfer method to precisely determine various parameters that dominate the electrode kinetics. Model validation was also conducted to clearly present the predictability of the model with different cell configurations, i.e. with and without microporous layers. Through the model, effect of the oxygen permeation coefficient of the Nafion membrane on the anode flooding was investigated. In addition, reverse‐current generation was predicted with different anode saturations and oxygen permeation coefficients to provide a detailed explanation on their relationship. Copyright © 2013 John Wiley & Sons, Ltd.

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