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A way to limit the long-term degradation of solid oxide fuel cell cathode by decorating the surface with K2NiF4-Structure Pr4Ni3O10+� phase

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dc.citedby4
dc.contributor.authorSaher S.en_US
dc.contributor.authorTan C.Y.en_US
dc.contributor.authorRamesh S.en_US
dc.contributor.authorYap B.K.en_US
dc.contributor.authorOng B.H.en_US
dc.contributor.authorMo K.H.en_US
dc.contributor.authorAl-Furjan M.S.H.en_US
dc.contributor.authorid36134688200en_US
dc.contributor.authorid16029485400en_US
dc.contributor.authorid41061958200en_US
dc.contributor.authorid26649255900en_US
dc.contributor.authorid7102342460en_US
dc.contributor.authorid55915884700en_US
dc.contributor.authorid57888381600en_US
dc.date.accessioned2025-03-03T07:44:50Z
dc.date.available2025-03-03T07:44:50Z
dc.date.issued2024
dc.description.abstractProlonged annealing of La0.6Sr0.4Co0.2Fe0.8O3-� (LSCF) at 700 �C for 1000 h resulted in phase segregation on the surface in the form of submicron-sized SrO on the grains and micron-sized CoFe2O4 particles near the grain boundaries during electrical conductivity relaxation (ECR) measurements. The presence of segregated particles results in a substantial decrease in the surface exchange coefficient, kchem. To mitigate this issue, the LSCF electrodes underwent a systematic coating process with the K2NiF4-structure Pr4Ni3O10+� (PNO), while varying the loading content, thickness, and porosity. This is achieved by adjusting the gap between the nozzle exit and LSCF surface, ranging from 2 cm to 9 cm, coupled with the application of ultrasonic vibration of the nozzle chamber operating between 40 kHz and 180 kHz. Optimal surface coverage with a loading content of 0.28 mg cm?2 referred to as PNO5 results in a significant increase in kchem by up to one and a half order of magnitude compared to bare LSCF. The PNO coating effectively suppresses phase segregation during prolonged exposure, resulting in a substantial decrease in degradation. The improved performance is attributed to the optimal surface coverage of coated particulates, which enhances the active sites for oxygen reduction reaction (ORR) and the triple phase boundary (TPB) area. These exceptional characteristics position PNO coated LSCF as a highly promising cathode option for low temperature solid oxide fuel cells (SOFCs). ? 2023 Elsevier B.V.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNo233899
dc.identifier.doi10.1016/j.jpowsour.2023.233899
dc.identifier.scopus2-s2.0-85179609967
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85179609967&doi=10.1016%2fj.jpowsour.2023.233899&partnerID=40&md5=426f3778297716efcd94d634f2d9f5e4
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/36809
dc.identifier.volume592
dc.publisherElsevier B.V.en_US
dc.sourceScopus
dc.sourcetitleJournal of Power Sources
dc.subjectCathodes
dc.subjectCoatings
dc.subjectElectrolytic reduction
dc.subjectGrain boundaries
dc.subjectIron compounds
dc.subjectLanthanum compounds
dc.subjectManganese compounds
dc.subjectNickel compounds
dc.subjectNozzles
dc.subjectSegregation (metallography)
dc.subjectSolid oxide fuel cells (SOFC)
dc.subjectStrontium compounds
dc.subjectSurface segregation
dc.subjectTemperature
dc.subjectUltrasonic effects
dc.subjectFuel cell cathodes
dc.subjectIn-phase
dc.subjectMixed conducting oxides
dc.subjectOxygen exchange kinetics
dc.subjectPhase segregations
dc.subjectProlonged annealing
dc.subjectSolid oxide fuel cell cathode
dc.subjectSolid-oxide fuel cell
dc.subjectSubmicron-sized
dc.subjectSurface coverages
dc.subjectOxygen
dc.titleA way to limit the long-term degradation of solid oxide fuel cell cathode by decorating the surface with K2NiF4-Structure Pr4Ni3O10+� phaseen_US
dc.typeArticleen_US
dspace.entity.typePublication
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