Influence of crystallinity and particle size on the electrochemical properties of spray pyrolyzed Nd2NiO4+δ powders

David Mesguich (1) , Jean-Marc. Bassat (1) , Cyril Aymonier (1) , Annelise Brüll (1) , Laurent Dessemond (2) , Elisabeth Djurado (2)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces

This paper is dedicated to the study of the relationship between the Nd2NiO4+δ powder micro-structural properties (especially particle size and crystallinity) and electrochemical properties when the oxide is used as SOFC cathode deposited on 8YSZ electrolyte coated with thin doped ceria. Nano-structured particles of Nd2NiO4+δ with controlled crystallinity, size and morphology have been synthesized using ultrasonic spray pyrolysis (USP). The series and polarization resistances measured on symmetrical half cells Nd2NiO4+δ/YDC/8YSZ/YDC/Nd2NiO4+δ are both found to be dependent on the cathode microstructure and present a similar evolution with temperature. The best results are obtained for highly crystalline cathode powders combined with a small particle size.

Mots clés: Solid oxide fuel cell; Cathode; Mixed ionic and electronic conductor; Electrochemical impedance spectroscopy; Nickelates; Ultrasonic spray pyrolysis

Domaines: Matériaux

David Mesguich, Jean-Marc. Bassat, Cyril Aymonier, Annelise Brüll, Laurent Dessemond, et al.. Influence of crystallinity and particle size on the electrochemical properties of spray pyrolyzed Nd2NiO4+δ powders. Electrochimica Acta, 2013, 87, pp.330-335. ⟨10.1016/j.electacta.2012.07.134⟩. ⟨hal-00762225⟩