Fabrication and Characterization of Anode-Supported Tubular Solid-Oxide Fuel Cells by Slip Casting and Dip Coating Techniques

Autor:	Ee Ho Tang, Lan Zhang, Hong Quan He, Jan Ma, Wen Rui Kwek, San Ping Jiang
Rok vydání:	2009
Předmět:	Materials science Non-blocking I/O Oxide Sintering Electrolyte Dip-coating Anode chemistry.chemical_compound chemistry Materials Chemistry Ceramics and Composites Slurry Composite material Yttria-stabilized zirconia
Zdroj:	Journal of the American Ceramic Society. 92:302-310
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1551-2916.2008.02852.x
Popis:	High-performance anode-supported tubular solid-oxide fuel cells (SOFCs) have been successfully developed and fabricated using slip casting, dip coating, and impregnation techniques. The effect of a dispersant and solid loading on the viscosity of the NiO/Y2O3–ZrO2 (NiO/YSZ) slurry is investigated in detail. The viscosity of the slurry was found to be minimum when the dispersant content was 0.6 wt% of NiO/YSZ. The effect of sintering temperature on the shrinkage and porosity of the anode tubes, densification of the electrolyte, and performance of the cell at different solid loadings is also investigated. A Ni/YSZ anode-supported tubular cell fabricated from the NiO/YSZ slurry with 65 wt% solid loading and sintered at 1380°C produced a peak power output of ∼491 and ∼376 mW/cm2 at 800°C in wet H2 and CH4, respectively. With the impregnation of Ce0.8Gd0.2O2 (GDC) nanoparticles, the peak power density increased to ∼1104 and ∼770 mW/cm2 at 800°C in wet H2 and CH4, respectively. GDC impregnation considerably enhances the electrochemical performance of the cell and significantly reduces the ohmic and polarization resistances of thin solid electrolyte cells.
Databáze:	OpenAIRE
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