Enhancing oxygen reduction reaction of YSZ/La₂NiO_4+δ using an ultrathin La₂NiO_4+δ interfacial layer

Messaoud Benamira (1, 2, 3, 4) , Armelle Ringuedé (3, 4) , Michel Cassir (3, 4) , David Horwat (5) , Pascal Lenormand (6, 6) , Florence Ansart (6, 6) , Jean-Marc. Bassat (7) , Jean-Paul Viricelle (8, 9, 10)

1 LIME - Laboratory of Interaction Materials and Environment
2 UMSBJ - Université Mohammed Seddik Benyahia [Jijel] | University of Jijel
3 PSL - Université Paris sciences et lettres
4 ENSCP - Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL
5 IJL - Institut Jean Lamour
6 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
7 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
8 PTSI-ENSMSE - Département Procédés de Transformations des Solides et Instrumentation
9 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
10 LGF-ENSMSE - Laboratoire Georges Friedel

In this work, La₂NiO_4+δ is used as cathode material for Intermediate temperature solid oxide fuel cells (IT-SOFC). Scanning electron microscopy, X-ray diffraction, and electrochemical impedance spectroscopy are used to investigate the effect of the presence of an ultrathin La₂NiO_4+δ layer (80 nm) deposited by dip-coating or sputtering at the interface YSZ/La₂NiO_4+δ. The thick porous cathode layer of La₂NiO_4+δ is deposited by screen-printing, and sintered at 1000 °C for 2 h or 1200 °C for 20 min in order to study the effect of sintering temperature on the electrochemical properties. The results show that the electrochemical performances of the cathode are influenced by the deposition technique. The best electrochemical properties are obtained with the use of the nano film interface layer deposited by sputtering. The introduction of ultrathin interface with nano grained between the cathode and electrolyte is a promising technique to reduce polarization resistance associated with oxygen reduction reaction (ORR) on the cathode.

Mots clés: Sputtering; Dip-coating; La₂NiO_4+&#948 cathode; SOFCs; La₂NiO_4+δ cathode; Ultrathin film

Domaines: Matériaux; Matériaux

Messaoud Benamira, Armelle Ringuedé, Michel Cassir, David Horwat, Pascal Lenormand, et al.. Enhancing oxygen reduction reaction of YSZ/La₂NiO_4+δ using an ultrathin La₂NiO_4+δ interfacial layer. Journal of Alloys and Compounds, 2018, 746, pp.413-420. ⟨10.1016/j.jallcom.2018.02.339⟩. ⟨hal-01744173⟩