LOW-TEMPERATURE, ANODE-SUPPORTED HIGH POWER DENSITY SOLID OXIDE FUEL CELLS WITH NANOSTRUCTURED ELECTRODES

Technical Report · Fri Apr 07 04:00:00 EDT 2000

DOI:https://doi.org/10.2172/784599· OSTI ID:784599

Virkar, Anil V

Nanosize yttria-stabilized zirconia (YSZ) was synthesized by a unique approach based on molecular decomposition. In this approach, yttria-doped BaZrO{sub 3} (Y-BaZrO{sub 3}) or yttria-doped Na{sub 2}ZrO{sub 3} (Y-Na{sub 2}ZrO{sub 3}) precursors were first synthesized from BaCO{sub 3}, ZrO{sub 2}, Y2O{sub 3} or BaCO{sub 3} and commercial YSZ for Y-BaZrO{sub 3}, and from Na{sub 2}CO{sub 3} and YSZ for Y-Na{sub 2}ZrO{sub 3}, by a conventional solid state reaction method. Then, the precursors were boiled to leach away the unwanted species, BaO or Na{sub 2}O, either in a dilute HNO{sub 3} solution in water in the case of Y-BaZrO{sub 3}, or in de-ionized water in the case of Y-Na{sub 2}ZrO{sub 3}. During boiling in HNO{sub 3} or water, the insoluble residue of Zr-Y-O composition formed fine, nanosize YSZ particles. X-ray diffraction (XRD) and specific surface area measurements on the as-synthesized powders confirmed the formation of nanosize YSZ. A subsequent heating in air led to particle growth. However, for a treatment at a temperature as high as 1000 C, the particle size was well in the nanosize range. XRD showed that the as-synthesized YSZ powders, as well as those heated up to 1000 C, the maximum temperature the powders were heated to after leaching, are of cubic structure.

• Research Organization: Federal Energy Technology Center, Morgantown, WV (US); Federal Energy Technology Center, Pittsburgh, PA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC26-99FT40713
• OSTI ID: 784599
• Report Number(s): AC26-99FT40713--04
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
BARIUM OXIDES
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
ELECTRODES
PRECURSOR
SODIUM OXIDES
SOLID OXIDE FUEL CELLS
SURFACE AREA
YTTRIUM OXIDES
ZIRCONIUM OXIDES