Mostrar el registro sencillo del ítem

dc.contributor.author
Yakal Kremki, Kyle
dc.contributor.author
Mogni, Liliana Verónica
dc.contributor.author
Montenegro Hernandez, Alejandra
dc.contributor.author
Caneiro, Alberto
dc.contributor.author
Barnett, Scott A.
dc.date.available
2018-01-10T19:19:10Z
dc.date.issued
2014-10
dc.identifier.citation
Caneiro, Alberto; Barnett, Scott A.; Montenegro Hernandez, Alejandra; Mogni, Liliana Verónica; Yakal Kremki, Kyle; Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd2NiO4+δ; Electrochemical Society; Journal of the Electrochemical Society; 161; 14; 10-2014; F1366-F1374
dc.identifier.issn
0013-4651
dc.identifier.uri
http://hdl.handle.net/11336/32883
dc.description.abstract
Oxygen reduction kinetic parameters – oxygen ion diffusion Dδ, molar surface exchange rate ℜO and surface exchange coefficient k – were determined for porous Nd2NiO4+δ solid oxide fuel cell cathodes as a function of temperature and oxygen partial pressure by analyzing electrochemical impedance spectroscopy data using the Adler-Lane-Steele model. Electrode microstructural data used in the model calculations were obtained by three-dimensional focused ion beam-scanning electron microscope tomography. Cathodes were fabricated using Nd2NiO4+δ powder derived from a sol-gel method and were tested as symmetrical cells with LSGM electrolytes. The oxygen surface exchange rate exhibited a power-law dependency with oxygen partial pressure, whereas the oxygen diffusivity values obtained varied only slightly. The present analysis suggests that the O-interstitial diffusion has a bulk transport path, whereas the surface exchange process involves dissociative adsorption on surface sites followed by O-incorporation. For Nd2NiO4+δ at 700°C and 0.2 atm oxygen pressure, Dδ = 5.6·10−8 cm2s−1, ℜO = 2.5·10−8 mol·cm−2 s−1. The present Dδ and ℜO values and their activation energies are slightly different to those previously reported for Nd2NiO4+δ using other measurement methodologies, and lower than typical state-of-the-art Co-rich perovskites. However, the average kδ = 1.0 10−5 cm·s−1 at 700°C is comparable to those of fast oxygen exchange rate perovskites.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Electrochemical Society
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Electrodes
dc.subject
Interstitial Oxygen
dc.subject
Fib-Sem
dc.subject.classification
Otras Ciencias Químicas
dc.subject.classification
Ciencias Químicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Determination of Electrode Oxygen Transport Kinetics Using Electrochemical Impedance Spectroscopy Combined with Three-Dimensional Microstructure Measurement: Application to Nd2NiO4+δ
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-05T16:24:31Z
dc.journal.volume
161
dc.journal.number
14
dc.journal.pagination
F1366-F1374
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Yakal Kremki, Kyle. Northwestern University; Estados Unidos
dc.description.fil
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Montenegro Hernandez, Alejandra. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Caneiro, Alberto. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Barnett, Scott A.. Northwestern University; Estados Unidos
dc.journal.title
Journal of the Electrochemical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1149/2.0521414jes
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://jes.ecsdl.org/content/161/14/F1366


Archivos asociados

Documento no disponible

Comunidades y colecciones

Mostrar el registro sencillo del ítem