3 results match your criteria: "Institute of Energy and Climate Research D-52425 Jülich Germany A.Kulikovsky@fz-juelich.de.[Affiliation]"

PEM fuel cell distribution of relaxation times: a method for the calculation and behavior of an oxygen transport peak.

Phys Chem Chem Phys

September 2020

Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-14: Electrochemical Process Engineering, D-52425 Jülich, Germany. and Lomonosov Moscow State University, Research Computing Center, 119991 Moscow, Russia.

A simple numerical method for the calculation of the distribution of relaxation times (DRT) for PEM fuel cell impedance is developed. The method combines the Tikhonov regularization technique and projected gradient iterations. The method is illustrated by calculating DRT for the synthetic impedance of two parallel RC-circuits and for Warburg finite-length impedance.

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Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study.

RSC Adv

November 2019

Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-14: Electrochemical Process Engineering D-52425 Jülich Germany

Unexpected over-linear transport loss in low-Pt PEM fuel cells has been a subject of numerous studies and discussions in literature. Most of the authors agree that these losses are due to oxygen transport in the Nafion film covering Pt/C agglomerates in the cathode catalyst layer (CCL). We develop a model for PEM fuel cell impedance, which takes into account oxygen transport through the film.

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