Recently LaNi1−xFexO3 materials have been suggested as good candidates for cathodes for Intermediate Temperature Solid Oxide Fuel Cells. The electrical conductivity and the morphology of LaNi0.6Fe0.4O3 samples have been studied as a function of preparation route and calcination temperature. The conductivity, mainly electronic, strongly depends on the densification of the material, which is influenced by the preparation procedure. DFT calculations indicate that the conduction bands of LaNi0.6Fe0.4O3 are mainly made up of Fe and Ni 3d states and that there is a small bandwidth (2.3 eV) around the Fermi level. Moreover, a small polaron mechanism for the electronic conduction in this material is suggested by the simulations.

Influence of synthesis route on morphology and electrical properties of LaNi0.6Fe0.4O3

MONTINI, TIZIANO;TAVAGNACCO, CLAUDIO;VICARIO, GIANPAOLO;FORNASIERO, Paolo;GRAZIANI, MAURO
2006

Abstract

Recently LaNi1−xFexO3 materials have been suggested as good candidates for cathodes for Intermediate Temperature Solid Oxide Fuel Cells. The electrical conductivity and the morphology of LaNi0.6Fe0.4O3 samples have been studied as a function of preparation route and calcination temperature. The conductivity, mainly electronic, strongly depends on the densification of the material, which is influenced by the preparation procedure. DFT calculations indicate that the conduction bands of LaNi0.6Fe0.4O3 are mainly made up of Fe and Ni 3d states and that there is a small bandwidth (2.3 eV) around the Fermi level. Moreover, a small polaron mechanism for the electronic conduction in this material is suggested by the simulations.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/1694273
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 68
  • ???jsp.display-item.citation.isi??? 59
social impact