Experimental investigation of pinhole effect on MEA/cell aging in PEMFC

Huang, Bo; Chatillon, Yohann; Bonnet, Caroline; Lapicque, François; Leclerc, Sébastien; Hinaje, Melika; Raël, Stéphane

doi:10.1016/j.ijhydene.2012.09.058

Cited by 34 publications

(18 citation statements)

References 19 publications

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“…This effect could also derive from the higher stoichiometry on the cathode side and the even higher flow rate since air and not pure oxygen is used, though. In general, the immediate effect of pinholes on the OCV has been proven to be rather low, as was expected from the literature [10].…”

Section: Discussionsupporting

confidence: 76%

“…A rather small pinhole with a diameter of 0.7 mm has shown close to no impact on the open circuit potential, whilst a larger pinhole with a diameter of 1.2 mm resulted in an immediate reduction of the potential [10]. At high current densities, a perforated MEA has exhibited a serious decrease in performance and strong voltage fluctuation.…”

Section: Effect Of Membrane Degradation On the Fuel Cell Operationmentioning

confidence: 99%

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Effect of pinhole location on degradation in polymer electrolyte fuel cells

Bodner

Hochenauer

Hacker

2015

Journal of Power Sources

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Section: Discussionsupporting

confidence: 76%

Section: Effect Of Membrane Degradation On the Fuel Cell Operationmentioning

confidence: 99%

Effect of pinhole location on degradation in polymer electrolyte fuel cells

Bodner

Hochenauer

Hacker

2015

Journal of Power Sources

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“…The fuel crossover varies very little, in comparable manner in the two runs of interest until 1,100 h. Then, a sudden increase in the last period of the run occurs, in particular without hybridization, expressing the formation of a defect in the membrane. With hybridization, the crossover attains 6.3 mA cm −2 at the end of the run whereas it could not be measured with accuracy without hybridization because of the strongly inclined profile of the LSV and CV curves: this continuously increasing current with the potential expressed the existence of a finite short circuit resistance between the anode and cathode compartments (without supercapacitors). The postulated contact between the two chambers was confirmed by the presence of holes observed in the membrane after the run.…”

Section: Resultsmentioning

confidence: 99%

Direct Coupling of PEM Fuel Cell to Supercapacitors for Higher Durability and Better Energy Management

et al. 2018

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A single polymer electrolyte fuel cell has been directly hybridized to a stack of three supercapacitors: the system formed has been investigated in operation in the fuel cell dynamic load cycle, which emulates the energy demand in transported applications. Comparison with regular, non‐hybridized fuel cell operation was analyzed in terms of hydrogen consumption in the case that the gas flow rates are directly controlled by cell current during the cycles with constant gas stoichiometric factors: the smoothening effect of the supercapacitors in the overall circuit leads to more even profiles of the cell current and voltage in the cycle, which allows safer and better hydrogen consumption management in this regime: the average H2 consumption per cycle could be reduced by 16% without change of the overall energy produced. Besides, the runs were conducted over more than 1,300 hours with evaluation of the fuel cell performance and capacity at regular intervals, with or without hybridization. A moderate positive effect of hybridization was observed in the time variations of the voltage‐current curves and the fuel crossover. However, the resistances for ohmic, charge transfer and diffusion phenomena, were not so much improved by the hybridization, in spite of less sharp voltage.

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“…Example of Pinholes in PEMFC membrane. (Huang, et al 2013) Pinholes pose a drawback when utilising FTA for PEMFC degradation modelling, through its cyclic behaviour (shown in figure 9). Pinholes can be created through the exothermal combustion of H 2 and O 2 which comes around from reactant gas crossover.…”

Section: Pinholes and Their Formationmentioning

confidence: 99%