Local measurements of hydrogen crossover rate in polymer electrolyte membrane fuel cells

Baik, Kyung Don; Kong, Im Mo; Hong, Bo; Kim, Sae Hoon; Kim, Min Soo

doi:10.1016/j.apenergy.2012.06.034

Cited by 41 publications

(11 citation statements)

References 23 publications

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“…As one of the key components in fuel cells, the proton exchange membrane (PEM) has characteristics of high proton conductivity and favorable electrochemical stability. Gas crossover is an unavoidable phenomenon in PEMFCs, having attracted much interest and research in recent years .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen permeation across super-thin membrane and the burning limitation in low-temperature proton exchange membrane fuel cell

et al. 2013

Int. J. Energy Res.

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SUMMARYHydrogen permeation across the membrane is unavoidable in proton exchange membrane fuel cells, especially for super‐thin membranes, which lowers the open‐circuit voltage and could even be a safety concern. In this paper, hydrogen permeation across two membranes (25‐um‐thick Nafion® 211 and 18‐um‐thick reinforced composite membrane) are evaluated at various temperatures, relative humidity (RH), and gas pressure differences between the anode and cathode. The results indicate that the hydrogen permeation rate in both membranes increases almost exponentially with temperature and linearly with pressure differences. Compared with RH, the effects of temperature and pressure differences are more crucial to hydrogen permeability. However, the effect of RH on the hydrogen permeation is quite complicated. The permeability exhibits a minimum value at intermediate RH (approximately 40% RH) for both applied membranes. The permeability of Nafion® 211 appears more sensitive to RH than that of reinforced composite membrane at elevated temperature. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Hydrogen permeation across super-thin membrane and the burning limitation in low-temperature proton exchange membrane fuel cell

et al. 2013

Int. J. Energy Res.

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“…The hydrogen permeation flux decreases as the voltage decreases. This is because the hydrogen permeation flux depends on the concentration difference on both sides of the membrane, which is consistent with the results of literature . The decrease of voltage accelerates the consumption of hydrogen, leading to a decrease in the concentration gradient on the two sides of the membrane.…”

Section: Resultsmentioning

confidence: 99%

“…This is because the hydrogen permeation flux depends on the concentration difference on both sides of the membrane, which is consistent with the results of literature. 25 The decrease of voltage accelerates the consumption of hydrogen, leading to a decrease in the concentration gradient on the two sides of the membrane. At high voltages (0.7-0.9 V), the permeation flux of hydrogen is almost kept near a constant value along the flow direction of the hydrogen.…”

Section: Hydrogen Permeation Flux Distribution Along the Anode Cl-mmentioning

confidence: 99%

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Research on two‐phase flow considering hydrogen crossover in the membrane for a polymer electrolyte membrane fuel cell

Ji¹,

Niu

Wang

et al. 2019

Int J Energy Res

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Summary Hydrogen crossover has an important effect on the performance and durability of the polymer electrolyte membrane fuel cell (PEMFC). Severe hydrogen crossover can accelerate the degradation of membrane and thus increase the possibility of explosion. In this study, a two‐phase, two‐dimensional, and multiphysics field coupling model considering hydrogen crossover in the membrane for PEMFC is developed. The model describes the distributions of reactant gases, current density, water content in membrane, and liquid water saturation in cathode electrodes of PEMFC with intrinsic hydrogen permeability, which is usually neglected in most PEMFC models. The conversion processes of water between gas phase, liquid phase, and dissolved water in PEMFC are simulated. The effects of changes in hydrogen permeability on PEMFC output performance and distributions of reactant gases and water saturation are analyzed. Results showed that hydrogen permeability has a marked effect on PEMFC operating under low current density conditions, especially on the open circuit voltage (OCV) with the increase of hydrogen permeability. On the contrary, the effect of hydrogen permeability on PEMFC at high current density is negligible within the variation range of hydrogen permeability in this study. The nonlinear relations of OCV with hydrogen diffusion rate are regressed.

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“…The term j cre accounts for persistent crossover effects when c H2 tends to vanish near the limit current density. In order to estimate it, a model similar to that often proposed for water electro-osmotic drag, which increases with PEM hydration, has been used [41]:…”

Section: Hydrogen Crossovermentioning

confidence: 99%

Modeling the performance of hydrogen–oxygen unitized regenerative proton exchange membrane fuel cells for energy storage

Guarnieri

Alotto

Moro

2015

Journal of Power Sources

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Local measurements of hydrogen crossover rate in polymer electrolyte membrane fuel cells

Cited by 41 publications

References 23 publications

Hydrogen permeation across super-thin membrane and the burning limitation in low-temperature proton exchange membrane fuel cell

Hydrogen permeation across super-thin membrane and the burning limitation in low-temperature proton exchange membrane fuel cell

Research on two‐phase flow considering hydrogen crossover in the membrane for a polymer electrolyte membrane fuel cell

Modeling the performance of hydrogen–oxygen unitized regenerative proton exchange membrane fuel cells for energy storage

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