Influence of electrospraying parameters on the microstructure of La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}F{sub 0.8}O{sub 3-{delta}} films for SOFCs

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.04.018· OSTI ID:21370477

Marinha, Daniel; Rossignol, Cecile ^[1]; Djurado, Elisabeth ^[1]

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1. Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, 1130 rue de la Piscine, B.P. 75, 38402 St. Martin d'Heres, Grenoble Institute of Technology/UJF/CNRS (UMR5631) (France)

Ceramics can play a remarkable role in the engineering of intermediate temperature solid oxide fuel cells (IT-SOFCs) capable of meeting the ambitious targets of reduced cost and improved lifetime. While mixed ionic-electronic conductors such as La{sub x}Sr{sub 1-x}Co{sub y}Fe{sub 1-y}O{sub 3-{delta}} are being used as volumic cathodes to increase the catalytic performance of these components, adequate microstructures are also an important requirement for optimal performance, particularly at lower operating temperatures. This work is devoted to the fabrication of La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} films on Ce{sub 0.9}Gd{sub 0.1}O{sub 2-{delta}} substrates by electrostatic spray deposition (ESD) and to the characterization of the microstructural dependence on the deposition conditions. A wide variety of microstructures ranging from dense to porous, with particular features such as reticulation and micro-porosity, were obtained by varying the ESD deposition parameters: nozzle-to-substrate distance (15, 30, 43, 45, and 58 mm), solution flow rate (0.34 and 1.5 mL/h), and substrate temperature (300, 350, 400 and 450 deg. C). The correlation between deposition parameters and resulting microstructures was systematically studied and put into evidence. - Graphical Abstract: This work is devoted to the fabrication of La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} films on dense Ce{sub 0.9}Gd{sub 0.1}O{sub 2-{delta}} substrates by electrostatic spray deposition (ESD) and to the characterization of the microstructural dependence on the deposition conditions. A wide variety of microstructures ranging from dense to porous, with particular features such as reticulation and micro-porosity, were obtained by varying the nozzle-to-substrate distance, substrate temperature and solution flow rate.Cross-section view of the fractal-like La{sub 0.6}Sr{sub 0.4}Co{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} cathode film, as-deposited by electrostatic spray deposition.

• OSTI ID: 21370477
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
CATHODES
CERAMICS
CHALCOGENIDES
COBALT COMPOUNDS
DEPOSITION
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRODES
FABRICATION
FILMS
FLUORIDES
FLUORINE COMPOUNDS
FUEL CELLS
HALIDES
HALOGEN COMPOUNDS
HIGH-TEMPERATURE FUEL CELLS
LANTHANUM COMPOUNDS
MATERIALS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
POROSITY
POROUS MATERIALS
RARE EARTH COMPOUNDS
SOLID ELECTROLYTE FUEL CELLS
SOLID OXIDE FUEL CELLS
SPRAY COATING
STRONTIUM COMPOUNDS
SURFACE COATING
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TRANSITION ELEMENT COMPOUNDS