The role of bi-polar plate design and the start-up protocol in the spatiotemporal dynamics during solid oxide fuel cell anode reduction

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dc.contributor.authorHeenan, Thomas M. M.
dc.contributor.authorNabavi, Seyed Ali
dc.contributor.authorErans, María
dc.contributor.authorRobinson, James B.
dc.contributor.authorKok, Matthew D. R.
dc.contributor.authorMaier, Maximilian
dc.contributor.authorBrett, Daniel J. L.
dc.contributor.authorShearing, Paul R.
dc.contributor.authorManovic, Vasilije
dc.date.accessioned2020-08-18T10:17:40Z
dc.date.available2020-08-18T10:17:40Z
dc.date.issued2020-07-10
dc.description.abstractStart-up conditions largely dictate the performance longevity for solid oxide fuel cells (SOFCs). The SOFC anode is typically deposited as NiO-ceramic that is reduced to Ni-ceramic during start-up. Effective reduction is imperative to ensuring that the anode is electrochemically active and able to produce electronic and ionic current; the bi-polar plates (BPP) next to the anode allow the transport of current and gases, via land and channels, respectively. This study investigates a commercial SOFC stack that failed following a typical start-up procedure. The BPP design was found to substantially affect the spatiotemporal dynamics of the anode reduction; Raman spectroscopy detected electrochemically inactive NiO on the anode surface below the BPP land-contacts; X-ray computed tomography (CT) and scanning electron microscopy (SEM) identified associated contrasts in the electrode porosity, confirming the extension of heterogeneous features beyond the anode surface, towards the electrolyte-anode interface. Failure studies such as this are important for improving statistical confidence in commercial SOFCs and ultimately their competitiveness within the mass-market. Moreover, the spatiotemporal information presented here may aid in the development of novel BPP design and improved reduction protocol methods that minimize cell and stack strain, and thus maximize cell longevityen_UK
dc.identifier.citationHeenan TM, Nabavi SA, Erans M, et al., (2020) The role of bi-polar plate design and the start-up protocol in the spatiotemporal dynamics during solid oxide fuel cell anode reduction. Energies, Volume 13, Issue 14, July 2020, Article number 3552en_UK
dc.identifier.issn1996-1073
dc.identifier.urihttps://doi.org/10.3390/en13143552
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15696
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectdegradationen_UK
dc.subjectSEMen_UK
dc.subjectRamanen_UK
dc.subjectX-ray CTen_UK
dc.subjectreductionen_UK
dc.subjectREDOXen_UK
dc.subjectNi–YSZen_UK
dc.subjectanodeen_UK
dc.subjectfuel cellen_UK
dc.subjectSOFCen_UK
dc.titleThe role of bi-polar plate design and the start-up protocol in the spatiotemporal dynamics during solid oxide fuel cell anode reductionen_UK
dc.typeArticleen_UK

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