Tailoring the microstructure of a solid oxide fuel cell anode support by calcination and milling of YSZ
Resumen: In this study, the effects of calcination and milling of 8YSZ (8 mol% yttria stabilized zirconia) used in the nickel-YSZ anode on the performance of anode supported tubular fuel cells were investigated. For this purpose, two different types of cells were prepared based on a Ni-YSZ/YSZ/Nd2NiO4+d-YSZ configuration. For the anode preparation, a suspension was prepared by mixing NiO and YSZ in a ratio of 65:35 wt% (Ni:YSZ 50:50 vol.%) with 30 vol.% graphite as the pore former. As received Tosoh YSZ or its calcined form (heated at 1500 °C for 3 hours) was used in the anode support as the YSZ source. Electrochemical results showed that optimization of the fuel electrode microstructure is essential for the optimal distribution of gas within the support of the cell, especially under electrolysis operation where the performance for an optimized cell (calcined YSZ) was enhanced by a factor of two. In comparison with a standard cell (containing as received YSZ), at 1.5 V and 800 °C the measured current density was -1380 mA cm-2 and -690 mA cm-2 for the cells containing calcined and as received YSZ, respectively. The present study suggests that the anode porosity for improved cell performance under SOEC is more critical than SOFC mode due to more complex gas diffusion under electrolysis mode where large amount of steam needs to be transfered into the cell.
Idioma: Inglés
DOI: 10.1038/srep27359
Año: 2016
Publicado en: SCIENTIFIC REPORTS 6 (2016), 27359 [9 pp]
ISSN: 2045-2322

Factor impacto JCR: 4.259 (2016)
Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 10 / 63 = 0.159 (2016) - Q1 - T1
Factor impacto SCIMAGO: 1.691 - Multidisciplinary (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-68078-R
Tipo y forma: Article (Published version)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.


Exportado de SIDERAL (2020-02-21-13:37:39)

Este artículo se encuentra en las siguientes colecciones:
Articles



 Record created 2016-07-13, last modified 2020-02-21


Versión publicada:
 PDF
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)