Anodic performance of bilayer Ni-YSZ SOFC anodes formed by electrophoretic deposition

作者：Itagaki Yoshiteru^*; Shinohara Kohei; Yamaguchi Syuhei; Yahiro Hidenori

来源：Journal of the Ceramic Society of Japan, 2015, 123(1436): 235-238.

DOI：10.2109/jcersj2.123.235

• SOFC
• Anode
• Double layer
• Electrophoretic deposition
• Ni-YSZ

Bilayer Ni-YSZ anode films for SOFCs were prepared by electrophoretic deposition (EPD). The thickness of each layer of the bilayer anode films, which consist of 50 wt% Ni-YSZ as the active layer and 70 wt% Ni-YSZ as the current collecting layer (50Ni-YSZ/70Ni-YSZ), were controlled by the deposition time of the EPD process. For the monolayer anodes, 70Ni-YSZ showed a better performance than 50Ni-YSZ. The bilayer film, 50Ni-YSZ/70Ni-YSZ, showed an even better performance than the 70Ni-YSZ monolayer film. Probably, 50Ni-YSZ anode has more reaction sites compared to 70Ni-YSZ; on the other hand, 70Ni-YSZ has higher porosity to be a gas diffusion (or current collecting) layer. The anodic performance of the bilayer film significantly depended on the film thickness of the 50Ni-YSZ layer, and 3 mu m was found to be the optimized thickness as the active layer, which suggests that the charge transfer reaction site extended up to a 3-mu m thickness from the anode/electrolyte interface.

• 出版日期2015-4