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The influence of dynamic load changes on temporary impedance in hydrogen fuel cells, selection and Validation of the electrical equivalent circuit

Darowicki, Kazimierz and Janicka, Ewa and Mielniczek, Michal and Zielinski, Artur and Gawel, Lukasz and Mitzel, Jens and Hunger, Jürgen (2019) The influence of dynamic load changes on temporary impedance in hydrogen fuel cells, selection and Validation of the electrical equivalent circuit. Applied Energy, 251, p. 113396. Elsevier. DOI: 10.1016/j.apenergy.2019.113396 ISSN 0306-2619

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Official URL: https://www.sciencedirect.com/science/article/pii/S0306261919310700?via%3Dihub

Abstract

To achieve optimal performance of a fuel cell, a reliable monitoring and diagnostic method is required. The currently utilized methods give limited information or they are impossible to use under dynamic working conditions. To obtain comprehensive information about the fuel cell operation we utilized novel dynamic electrochemical impedance spectroscopy. Impedance measurements in dynamic mode were performed on a hydrogen fuel cell, working under various conditions. By utilizing this new methodology, optimum Parameters for cell operation were determined. An electrical equivalent circuit for cathodic processes was determined. Presence of an interlayer, between the membrane and the catalytic layer, was postulated. The instantaneous impedance spectra were analysed under the function of current load. The complete character of the impedance spectra was revealed, and the electrical equivalent circuit was validated. The presence of the interlayer was established by impedance analysis and by a profile of platinum content changes in the Membrane electrode assembly. The proposed Investigation methodology provides monitoring and diagnostics of fuel cell components, which gives the possibility of streamlined management of the fuel cell operation.

Item URL in elib:https://elib.dlr.de/127721/
Document Type:Article
Title:The influence of dynamic load changes on temporary impedance in hydrogen fuel cells, selection and Validation of the electrical equivalent circuit
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Darowicki, KazimierzPolitechnika GdanskaUNSPECIFIED
Janicka, EwaPolitechnika GdanskaUNSPECIFIED
Mielniczek, MichalPolitechnika GdanskaUNSPECIFIED
Zielinski, ArturPolitechnika GdanskaUNSPECIFIED
Gawel, LukaszPolitechnika GdanskaUNSPECIFIED
Mitzel, JensJens.Mitzel (at) dlr.dehttps://orcid.org/0000-0001-8137-9689
Hunger, JürgenZSWUNSPECIFIED
Date:20 May 2019
Journal or Publication Title:Applied Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:251
DOI :10.1016/j.apenergy.2019.113396
Page Range:p. 113396
Publisher:Elsevier
ISSN:0306-2619
Status:Published
Keywords:PEM fuel cell Diagnostics Impedance Equivalent circuit Dynamic load change
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Mitzel, Dr. Jens
Deposited On:12 Jul 2019 12:57
Last Modified:06 Sep 2019 15:21

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