Traditional LSM (La1-xSrxMnO3-w) SOFC cathode material shows some drawbacks operating below 800 °C, in particular poor oxygen ion conduction, which limits the active area of the electrode to the three phase boundary (TPB) between electrolyte, electrode and gas phase at the interface. A strategy to overcome this problem consists in the development of materials with both good oxygen ion and electronic conductivity, in which oxygen ions catalytically dissociated on the surface are able to reach the electrolyte by diffusion in the bulk of the cathode. La1-xSrxFeO3-w has been proposed as possible SOFC cathode, in search for a high activity at lower temperatures with respect to LSM. The aim of the work is the structural study of alternative cathodic materials for intermediate temperature solid oxide fuel cells, mainly based on ABO3 perovskite-type lanthanum ferrite. Within this framework the effects of A (La)-site doped with Sr or B (Fe)-site doped with Ta on the crystal structures of these materials were investigated by X-ray powder diffraction (XRPD). In conjunction with the experimental results, the microscopic mechanisms of the doping effect were discussed providing deeper understanding into structure-property relations. Copyright © 2015, AIDIC Servizi S.r.l.

(2015). Structural studies of doped lanthanum orthoferrites of interest for SOFCs [journal article - articolo]. In CHEMICAL ENGINEERING TRANSACTIONS. Retrieved from http://hdl.handle.net/10446/51034

Structural studies of doped lanthanum orthoferrites of interest for SOFCs

NATALI SORA, Isabella;FELICE, Valeria;FONTANA, Francesca
2015-01-01

Abstract

Traditional LSM (La1-xSrxMnO3-w) SOFC cathode material shows some drawbacks operating below 800 °C, in particular poor oxygen ion conduction, which limits the active area of the electrode to the three phase boundary (TPB) between electrolyte, electrode and gas phase at the interface. A strategy to overcome this problem consists in the development of materials with both good oxygen ion and electronic conductivity, in which oxygen ions catalytically dissociated on the surface are able to reach the electrolyte by diffusion in the bulk of the cathode. La1-xSrxFeO3-w has been proposed as possible SOFC cathode, in search for a high activity at lower temperatures with respect to LSM. The aim of the work is the structural study of alternative cathodic materials for intermediate temperature solid oxide fuel cells, mainly based on ABO3 perovskite-type lanthanum ferrite. Within this framework the effects of A (La)-site doped with Sr or B (Fe)-site doped with Ta on the crystal structures of these materials were investigated by X-ray powder diffraction (XRPD). In conjunction with the experimental results, the microscopic mechanisms of the doping effect were discussed providing deeper understanding into structure-property relations. Copyright © 2015, AIDIC Servizi S.r.l.
articolo
2015
NATALI SORA, Isabella; Felice, Valeria; Fontana, Francesca
(2015). Structural studies of doped lanthanum orthoferrites of interest for SOFCs [journal article - articolo]. In CHEMICAL ENGINEERING TRANSACTIONS. Retrieved from http://hdl.handle.net/10446/51034
File allegato/i alla scheda:
File Dimensione del file Formato  
CET_structure_2015.pdf

Solo gestori di archivio

Versione: publisher's version - versione editoriale
Licenza: Licenza default Aisberg
Dimensione del file 1.01 MB
Formato Adobe PDF
1.01 MB Adobe PDF   Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/51034
Citazioni
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 3
social impact