English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/148363
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

The influence of the reducing conditions on the final microstructure and performance of nickel-yttria stabilized zirconia cermets

AuthorsMonzón, Hernán; Laguna-Bercero, M. A.
Issue Date2016
PublisherElsevier
CitationElectrochimica Acta 221: 41-47 (2016)
AbstractNi-YSZ (yttria stabilized zirconia) cermets are the most widespread composite materials to be used as SOFC fuel electrodes. These materials are generally fabricated by the reduction of NiO to Ni in a NiO-YSZ composite, where the reducing conditions have a great effect in the final microstructure of the electrode. In the present work, several reducing conditions were explored in order to find the most suitable microstructure for anode-supported microtubular solid oxide fuel cells (SOFCs). Samples were firstly reduced in either pure or diluted H (dry or humidified), at temperatures ranging from 400 to 800 °C while their DC conductivity was monitored. The highest conductivity value was measured for the sample reduced in pure humidified hydrogen at 800 °C. However, this sample experienced conductivity degradation in comparison with samples reduced under dry conditions. For the studied temperature range, nucleation of nano-porous nickel particles is firstly formed during reduction. However, from our experiments it was concluded that those nanoparticles are not stable with time, at least at temperatures between 600 °C and 800 °C. Electrochemical characterization of complete microtubular cells under real wet conditions was also performed under current load, confirming that the microstructure of the Ni-YSZ cermet is still evolving during operation.
Publisher version (URL)https://doi.org/10.1016/j.electacta.2016.10.152
URIhttp://hdl.handle.net/10261/148363
DOI10.1016/j.electacta.2016.10.152
Identifiersdoi: 10.1016/j.electacta.2016.10.152
issn: 0013-4686
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
zirconia cermets.pdf1,12 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.