Enhancement of high temperature thermoelectric performance of cobaltite based materials for automotive exhaust thermoelectric generators

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dc.contributor.authorBayata, Fatma
dc.date.accessioned2024-07-18T20:45:32Z
dc.date.available2024-07-18T20:45:32Z
dc.date.issued2022
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractThermoelectric (TE) generators can directly convert exhaust waste heat into electricity in vehicles. However, the low conversion efficiency of TE generators is the main obstacle to their commercialization in automotive. Their efficiency mainly depends on the performance of the used materials which is quantified by the figure of merit (ZT value). In the present study, single- and co-doped calcium cobaltites (CCO) with rare-earth (Tb) and transition metals (Cu, Fe, Ni, Mn, Cr) were produced using sol-gel technique in order to improve their high temperature TE properties for heat recovery in exhaust manifold applications. By the combined effect of doping approach and the production technique used in this study, a remarkable decrease in the grain size of CCO was obtained, and thus its thermal conductivity dramatically decreased. Besides, thermopower values were improved significantly. The reduction in thermal conductivity and the increase in thermopower led to an enhancement in ZT value of CCO ceramics. Among all the co-doped samples, Tb-Cu co-doped CCO displayed the maximum ZT value of 0.116 at 873 K which is 2.5 times larger than that of pure CCO. The high thermal stability and the enhanced TE performance make Tb-Cu co-doped CCO material a potential candidate for heat recovery in automotive exhaust TE generators.en_US
dc.identifier.doi10.1088/1361-665X/ac4120
dc.identifier.issn0964-1726
dc.identifier.issn1361-665X
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85122466237en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1088/1361-665X/ac4120
dc.identifier.urihttps://hdl.handle.net/11411/7600
dc.identifier.volume31en_US
dc.identifier.wosWOS:000999953700001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherIop Publishing Ltden_US
dc.relation.ispartofSmart Materials and Structuresen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectExhaust Thermoelectric Generatorsen_US
dc.subjectThermopoweren_US
dc.subjectWaste Heat Recoveryen_US
dc.subjectCobaltitesen_US
dc.subjectThermoelectricsen_US
dc.subjectOxide Ca3co4o9+Deltaen_US
dc.subjectCoen_US
dc.subjectCuen_US
dc.subjectFeen_US
dc.subjectSubstitutionen_US
dc.subjectNien_US
dc.subjectThermopoweren_US
dc.subjectCren_US
dc.titleEnhancement of high temperature thermoelectric performance of cobaltite based materials for automotive exhaust thermoelectric generatorsen_US
dc.typeArticleen_US

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