Anisotropic catalytic activity of the orientation controlled Nd₂NiO_4+δ/YSZ hetero-epitaxial system for SOFC cathode

Atsuo Yamada (1, 2) , Kazuyuki Saka (1) , Makiko Uehara (1) , Sou Taminato (1) , Ryoji Kanno (1) , Fabrice Mauvy (3) , Jean-Claude Grenier (3)

1 Department of Electronic Chemistry Interdisciplinary Graduate School of Science
2 Department of Chemical System Engineering
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Electrode-electrolyte hetero-epitaxial systems for solid oxide fuel cells (SOFCs) with two different configuration of Nd₂NiO_4+δ(110)//YSZ(100) and Nd₂NiO_4+δ(100)//YSZ(110) were successfully fabricated by pulsed laser deposition. Thin films of Nd₂NiO_4+δ approximately 20 nm thick were grown on a commercial single crystal of YSZ. The preferred two-dimensional diffusion paths of the oxide ions were perpendicular to the substrate for both configurations and showed oxygen reduction capability different from each other. This opens up new research direction focusing on the details of anisotropic catalytic activity of SOFC cathode depending on the crystalline surface.

Mots clés: K2NiF4; Solid oxide fuel cell; Epitaxial film; Oxygen reduction; Anisotropy

Domaines: Matériaux

Atsuo Yamada, Kazuyuki Saka, Makiko Uehara, Sou Taminato, Ryoji Kanno, et al.. Anisotropic catalytic activity of the orientation controlled Nd₂NiO_4+δ/YSZ hetero-epitaxial system for SOFC cathode. Electrochemistry Communications, 2010, 12 (12), pp.1690-1693. ⟨10.1016/j.elecom.2010.09.026⟩. ⟨hal-00549336⟩