| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1618936 | Journal of Alloys and Compounds | 2010 | 7 Pages |
Spray coating is widely used in industrial applications for the preparation of large, uniform thin films on various substrates due to its simplicity and cost-efficiency. To prevent reactions between a yttria-stabilised zirconia (YSZ) electrolyte and a La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) cathode, a Gd0.1Ce0.9O2 − δ (CGO) interlayer with a thickness of 2–3 μm is prepared on a YSZ electrolyte by spray coating. The results indicate that the properties of the CGO interlayer depend on its preparation conditions, including the powder pre-sintering temperature, the concentration of the dispersant and the sintering temperature. A densely packed CGO interlayer is obtained from a well-dispersed suspension of CGO powder pre-sintered at 750 °C with 6 wt.% PVP as a dispersant. After sintering at 1250 °C and 1300 °C, the CGO interlayer achieves an area special resistance (ASR) of 0.1 Ω cm2 at 800 °C and 0.4 Ω cm2 at 700 °C. Moreover, LSCF cells with a CGO interlayer obtain an average maximum power density greater than 600 mW cm−2 at 750 °C. Obvious diffusion of Sr is not observed in the cells, indicating that the CGO interlayer prepared by spray coating effectively blocks Sr diffusion.
