Performance equations for cathodes in polymer electrolyte fuel cells with non-uniform water flooding in gas diffusers

Hsuen, Hsiao-Kuo

doi:10.1016/j.jpowsour.2004.06.002

Cited by 16 publications

(7 citation statements)

References 31 publications

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“…This same concept can be extended to describe the dependence of the cathode's potential on current density. Hsuen [53] validates the one dimensional…”

Section: Patented Mitigation Techniquesmentioning

confidence: 69%

“…model approach by accurately determining a cell's performance based on the oxygen depletion within the cathode. Hsuen's investigations prove that all one, two and three dimensional models, can accurately estimate the operation of the cell as long as the complexity of the investigation is paired with the appropriate model[53].In order to simulate the effects of sub-zero start and operation,Sundaresan and Moore state that models must have the ability to map internal heating methods and the effect that the endplate thermal mass has upon the end cells[12]. Although current models do account for the internal and external heating methods, the lumped parameter assumption does not adequately describe the localized effects of these heating strategies.…”

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confidence: 99%

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Low Temperature Polymer Electrolyte Fuel Cell Performance Degradation

Fedock¹

2013

Physics and Technical Sciences

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“…This same concept can be extended to describe the dependence of the cathode's potential on current density. Hsuen [53] validates the one dimensional…”

Section: Patented Mitigation Techniquesmentioning

confidence: 69%

mentioning

confidence: 99%

Low Temperature Polymer Electrolyte Fuel Cell Performance Degradation

Fedock¹

2013

Physics and Technical Sciences

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“…The overall cell performance is the combined effect of each component of the MEA during actual cell operations [8,9,37,38]. In the present work, polarization measurements are corroborated with electrochemical impedance spectroscopy (EIS) data to characterize the electrochemical kinetics and mass transport mechanism on the cell performance under controlled temperature and humidification conditions.…”

Section: Introductionmentioning

confidence: 77%

Effects of Humidification on the Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells at Relatively High Cell Temperatures

Yin

Chang

2011

Fuel Cells

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This study focuses on the performances of proton exchange membrane fuel cells (PEMFCs) at 80 and 90 °C with feeds of varying degrees of humidification. The results show that ohmic resistance of the solid electrolyte decreases as the current density is raised because of the back diffusion of liquid water, that is, generated in the cathode active layer. On the other hand, severe liquid water accumulation occurs at high current densities, which hinders the oxygen transport in the cathode gas diffusion layer (GDL) resulting in the Nernst diffusion limitation. The polarization measurement correlates well with the electrochemical impedance spectroscopy (EIS) analysis. The effects of humidification on membrane hydration, activity in the catalyst layer, and oxygen diffusion over‐potential in the cathode GDL are elucidated with the proposed equivalent circuit model at varying operating current densities.

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“…Generally, cell performance is degraded by ohmic, activation and diffusion polarization. Activation polarization takes place at a low current density, while diffusion polarization takes place at a high current density [10]. Thus, s-FEP would decrease diffusion polarization by its high IEC value compared with Nafion Ò 112.…”

Section: Resultsmentioning

confidence: 99%