The role of ion exchange membrane in vanadium oxygen fuel cell

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dc.contributor.authorCharvát, Jiří
dc.contributor.authorMazúr, Petr
dc.contributor.authorPaidar, Martin
dc.contributor.authorPocedič, Jaromír
dc.contributor.authorVrána, Jiří
dc.contributor.authorMrlík, Jindřich
dc.contributor.authorKosek, Juraj
dc.date.accessioned2022-02-28T11:00:27Z
dc.date.available2022-02-28T11:00:27Z
dc.date.issued2021
dc.description.abstract-translatedThe effect of membrane properties on the vanadium-oxygen fuel cell performance was studied on a series of commercially available ion exchange membranes of different thickness and ion exchange capacity by selected characterization techniques including electrochemical impedance spectroscopy (ohmic and charge transfer resistance), steady load curves (performance stability) and galvanostatic charge-discharge cycles (efficiencies and capacity decay). Performance stability of the fuel cell was studied under defined conditions (state of charge, temperature, air flow rate) using continuous charging of vanadium electrolyte. In contrast to the previous studies, our results revealed that the membrane affects the fuel cell performance mainly via water management in the catalytic layer of gas diffusion cathode, while vanadium permeation across the membrane has only a minor impact. Generally, the fuel cell shows improved performance stability for more conductive membranes (thinner and with higher ion-exchange capacity), partially due to reduced ohmic losses, but more significantly due to the better ability of the membrane to drain water from the cathode via osmosis, which prevents the flooding of the cathodic catalytic layer. With the optimized membrane, we achieved stable fuel cell performanc at the highest current and power density values reported (75 mA cm−2 and 57 mW cm−2 in 50% state of charge).en
dc.format9 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationCHARVÁT, J. MAZÚR, P. PAIDAR, M. POCEDIČ, J. VRÁNA, J. MRLÍK, J. KOSEK, J. The role of ion exchange membrane in vanadium oxygen fuel cell. JOURNAL OF MEMBRANE SCIENCE, 2021, roč. 629, č. JUL 1 2021, s. nestránkováno. ISSN: 0376-7388cs
dc.identifier.document-number647729500005
dc.identifier.doi10.1016/j.memsci.2021.119271
dc.identifier.issn0376-7388
dc.identifier.obd43935067
dc.identifier.uri2-s2.0-85103370353
dc.identifier.urihttp://hdl.handle.net/11025/47050
dc.language.isoenen
dc.project.IDTK02030001/Vývoj pokročilých průtočných elektrochemických úložišť energiecs
dc.publisherElsevieren
dc.relation.ispartofseriesJournal Of Membrane Scienceen
dc.rightsPlný text není přístupný.cs
dc.rights© Elsevieren
dc.rights.accessclosedAccessen
dc.subject.translatedvanadium-oxygen fuel cellen
dc.subject.translatedIon exchange membraneen
dc.subject.translatedperformance stabilityen
dc.subject.translatedgas diffusion electrodeen
dc.subject.translatedwater managementen
dc.titleThe role of ion exchange membrane in vanadium oxygen fuel cellen
dc.typečlánekcs
dc.typearticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen

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