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dc.contributor.advisorPal, Uday B.en_US
dc.contributor.authorGasper, Paul Josephen_US
dc.date.accessioned2019-09-23T17:12:36Z
dc.date.available2019-09-23T17:12:36Z
dc.date.issued2019
dc.identifier.urihttps://hdl.handle.net/2144/37980
dc.description.abstractNickel-Yttria Stabilized Zirconia (Ni-YSZ) cermets are used as anodes in solid oxide fuel cells. These anodes are stable for tens of thousands of hours during operation and have low cost. In this work, Ni-YSZ anodes are infiltrated with nickel nanoparticles to increase the density of electrochemical reaction sites and improve their performance. However, infiltrated nickel nanoparticles are isolated from one another, so they are not electrochemically active. Two approaches have been utilized to activate infiltrated nickel nanoparticles: in-situ nickel spreading and simultaneous infiltration of nickel with Gd0.1Ce0.9O2-δ (GDC). In-situ nickel spreading, which occurs during exposure to anodic mass transfer limited currents, connects and activates nickel nanoparticles, improving anode performance but inherently causing nanoparticle coarsening. Simultaneous infiltration of Ni and GDC results in substantially improved anode performance, and the infiltrated nanostructures are more stable than infiltrated nickel. Detailed analysis of the electrochemical impedance by equivalent circuit modeling is used to separate the contributions of nickel and GDC infiltrants to the overall cell performance.en_US
dc.language.isoen_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectMaterials scienceen_US
dc.subjectDistribution of relaxation timesen_US
dc.subjectDRTen_US
dc.subjectEISen_US
dc.titleImproving electrochemical performance of Nickel - Yttria stabilized Zirconia cermet anodes employing nickel nanoparticlesen_US
dc.typeThesis/Dissertationen_US
dc.date.updated2019-08-30T19:03:56Z
etd.degree.nameDoctor of Philosophyen_US
etd.degree.leveldoctoralen_US
etd.degree.disciplineMaterials Science & Engineeringen_US
etd.degree.grantorBoston Universityen_US


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International