Abstract
Gadolinia-doped ceria (GDC, Gd 0.1Ce 0.9O 1.95) powders with high sinterability are prepared by carbonate coprecipitation and applied in the fabrication of Ni-YSZ (yttria-stabilized zirconia)-supported tubular solid oxide fuel cells (SOFCs) with a cell configuration of Ni-YSZ/Ni/Ni-GDC/GDC/LSCF(La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ)-GDC/LSCF. A high power density (594 mW cm -2) at 600°C is achieved using the cell (diameter: 6 mm) prepared by sintering of the electrolyte at 1400°C. This result is attributed to the dense electrolyte and good adherence between GDC and the electrode. The carbonate-derived GDC powders can be sintered to 97% of the theoretical density even at 1050°C, which demonstrates that the fabrication temperature of tubular SOFCs can potentially be lowered by using cost-effective Ni-YSZ supports.
Original language | English |
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Pages (from-to) | 119-127 |
Number of pages | 9 |
Journal | Journal of Power Sources |
Volume | 218 |
DOIs | |
Publication status | Published - 2012 Nov 15 |
Keywords
- Carbonate coprecipitation
- Gadolinia-doped ceria
- Nickel-yttria stabilized zirconia
- Solid oxide fuel cells
- Tubular solid oxide fuel cells
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering