X‐Ray‐Computed Radiography and Tomography Study of Electrolyte Invasion and Distribution inside Pristine and Heat‐Treated Carbon Felts for Redox Flow Batteries

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dc.contributor.authorGebhard, Marcus
dc.contributor.authorSchnucklake, Maike
dc.contributor.authorHilger, André
dc.contributor.authorRöhe, Maximilian
dc.contributor.authorOsenberg, Markus
dc.contributor.authorKrewer, Ulrike
dc.contributor.authorManke, Ingo
dc.contributor.authorRoth, Christina
dc.date.accessioned2020-11-25T10:01:25Z
dc.date.available2020-11-25T10:01:25Z
dc.date.issued2019-11-11
dc.date.updated2020-10-05T16:10:16Z
dc.description.abstractPorous carbon felts (CFs) are widely used electrode materials for vanadium redox flow batteries (VRFBs). These materials differ in their precursor material, thickness, or graphitization degree and demonstrate broad differences in electrochemical performance. Prior to operation, an activation step, such as acid or heat treatment (HT), is commonly performed to improve their performance. A thermal treatment in air functionalizes the surface of the electrode and improves reaction kinetics as well as the wettability of the electrode. Herein, pristine and heat‐treated CFs are compared regarding their electrolyte wetting behavior for the use in VRFB. Contact angle (CA) measurements are conducted ex situ to investigate the effect of the HT. Furthermore, the porous CFs are examined in situ with an in‐house‐built flow cell regarding their invasion behavior with different types of electrolytes by X‐ray radiography. Additionally, the distribution of the electrolyte inside the felts is investigated by X‐ray tomography. The results demonstrate the effect of the HT and choice of electrolyte on the wetting behavior and electrolyte distribution.en
dc.description.sponsorshipDFG, 276655287, FOR 2397: Multiskalen-Analyse komplexer Dreiphasensystemeen
dc.identifier.eissn2194-4296
dc.identifier.issn2194-4288
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/12066
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-10940
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.othercarbon feltsen
dc.subject.othercontact angle measurementsen
dc.subject.otherelectrolyte wettingen
dc.subject.otherthermal treatmentsen
dc.subject.othervanadium redox flow batteriesen
dc.subject.otherX-ray radiographiesen
dc.subject.otherX-ray tomographiesen
dc.titleX‐Ray‐Computed Radiography and Tomography Study of Electrolyte Invasion and Distribution inside Pristine and Heat‐Treated Carbon Felts for Redox Flow Batteriesen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber1901214en
dcterms.bibliographicCitation.doi10.1002/ente.201901214en
dcterms.bibliographicCitation.issue3en
dcterms.bibliographicCitation.journaltitleEnergy Technologyen
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.volume8en
tub.accessrights.dnbfreeen
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Werkstoffwissenschaften und -technologiende
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.instituteInst. Werkstoffwissenschaften und -technologiende
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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