Enabling high ionic conductivity in semiconductor electrolyte membrane by surface engineering and band alignment for LT-CFCs

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorYousaf Shah, M.A.K.en_US
dc.contributor.authorLu, Yuzhengen_US
dc.contributor.authorMushtaq, Naveeden_US
dc.contributor.authorYousaf, Muhammaden_US
dc.contributor.authorAkbar, Muhammaden_US
dc.contributor.authorRauf, Sajiden_US
dc.contributor.authorDong, Yiwangen_US
dc.contributor.authorLund, Peteren_US
dc.contributor.authorZhu, Binen_US
dc.contributor.authorAsghar, Imranen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorNew Energy Technologiesen
dc.contributor.organizationSoutheast University, Nanjingen_US
dc.contributor.organizationNanjing Xiaozhuang Collegeen_US
dc.contributor.organizationHubei Universityen_US
dc.contributor.organizationShenzhen Universityen_US
dc.contributor.organizationWuhan Universityen_US
dc.date.accessioned2022-12-22T09:46:47Z
dc.date.available2022-12-22T09:46:47Z
dc.date.issued2023-02en_US
dc.description.abstractWide bandgap semiconductor perovskite SrTiO3 (STO) has attracted extensive attention due to its higher kinetics of electrons (electronic conductivity). However, rare studies have been performed to tune the STO semiconductor towards ionic conduction, which could make it a promising candidate for an electrolyte in ceramic fuel cells (CFCs). Herein, we have designed a semiconductor perovskite Co/Fe–SrTiO3 as an electrolyte membrane to tune its semiconducting property to the ionic conduction via surface-enriched O-vacancies. The surface doping of Co/Fe into SrTiO3 resulted in lowering the Fermi level, leading to the space charge region and local electric field on the surficial region, which can enhance the ionic conduction (proton conduction) at the surface. The designed electrolyte exhibited a high ionic conductivity of 0.19 S/cm and the fuel cell employing it delivered a maximum power density of 1016 mW/cm2 at 520 °C. Moreover, the theoretical calculation was performed to support the experimental results, like disorder in lattice and oxygen vacancy formation energy. The surface doping of Co/Fe facilitated the enriched surface channels for quick ion transportation with lower activation energy. The presented methodology of surface doping has proven to be suitable for designing advanced materials for wide bandgap semiconductors with high ionic conductivity to develop next-generation CFCs.en
dc.description.versionPeer revieweden
dc.format.extent12
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationYousaf Shah, M A K, Lu, Y, Mushtaq, N, Yousaf, M, Akbar, M, Rauf, S, Dong, Y, Lund, P, Zhu, B & Asghar, I 2023, ' Enabling high ionic conductivity in semiconductor electrolyte membrane by surface engineering and band alignment for LT-CFCs ', Journal of Membrane Science, vol. 668, 121264 . https://doi.org/10.1016/j.memsci.2022.121264en
dc.identifier.doi10.1016/j.memsci.2022.121264en_US
dc.identifier.issn0376-7388
dc.identifier.otherPURE UUID: ccfe013d-9a23-4dee-ba3b-f5e3d6e34de8en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/ccfe013d-9a23-4dee-ba3b-f5e3d6e34de8en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85144012440&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/94934615/SCI_Shah_etal_MEMSCI_2022.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/118548
dc.identifier.urnURN:NBN:fi:aalto-202212227286
dc.language.isoenen
dc.publisherElsevier Science B.V.
dc.relation.ispartofseriesJournal of Membrane Scienceen
dc.relation.ispartofseriesVolume 668en
dc.rightsopenAccessen
dc.titleEnabling high ionic conductivity in semiconductor electrolyte membrane by surface engineering and band alignment for LT-CFCsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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