Structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate composite cathodes for intermediate- to low-temperature solid oxide fuel cells

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Abstract

The structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate (LSCF-SDC carbonate) composite cathodes were investigated with respect to the calcination temperatures and the weight content of the samarium-doped ceria (SDC) carbonate electrolyte. The composite cathode powder has been prepared from La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ and SDC carbonate powders using the high-energy ball milling technique in air at room temperature. Different powder mixtures at 30 wt%, 40 wt% and 50 wt% of SDC carbonate were calcined at 750-900 °C. The findings indicated that the structure and thermal properties of the composite cathodes were responsive to the calcination temperature and the content of SDC carbonate. The absence of any new phases as confirmed via XRD analysis demonstrated the excellent compatibility between the cathode and electrolyte materials. The particle size of the composite cathode powder was ∼0.3-0.9 μm having a surface area of 4-15 m 2 g -1. SEM investigation revealed the presence of large particles in the resultant powders resulting from the increased calcination temperature. The composite cathode containing 50 wt% SDC carbonate was found to exhibit the best thermal expansion compatibility with the electrolyte.

Original languageEnglish
Pages (from-to)1571-1576
Number of pages6
JournalCeramics International
Volume38
Issue number2
DOIs
Publication statusPublished - Mar 2012

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Samarium
Carbonates
Cerium compounds
Solid oxide fuel cells (SOFC)
Cathodes
Thermodynamic properties
Powders
Composite materials
Calcination
Electrolytes
Temperature
Ball milling
Thermal expansion
Particle size
Scanning electron microscopy
Air

Keywords

  • A. Calcination
  • B. Composites
  • C. Thermal expansion
  • E. Fuel cells

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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title = "Structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate composite cathodes for intermediate- to low-temperature solid oxide fuel cells",
abstract = "The structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate (LSCF-SDC carbonate) composite cathodes were investigated with respect to the calcination temperatures and the weight content of the samarium-doped ceria (SDC) carbonate electrolyte. The composite cathode powder has been prepared from La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ and SDC carbonate powders using the high-energy ball milling technique in air at room temperature. Different powder mixtures at 30 wt{\%}, 40 wt{\%} and 50 wt{\%} of SDC carbonate were calcined at 750-900 °C. The findings indicated that the structure and thermal properties of the composite cathodes were responsive to the calcination temperature and the content of SDC carbonate. The absence of any new phases as confirmed via XRD analysis demonstrated the excellent compatibility between the cathode and electrolyte materials. The particle size of the composite cathode powder was ∼0.3-0.9 μm having a surface area of 4-15 m 2 g -1. SEM investigation revealed the presence of large particles in the resultant powders resulting from the increased calcination temperature. The composite cathode containing 50 wt{\%} SDC carbonate was found to exhibit the best thermal expansion compatibility with the electrolyte.",
keywords = "A. Calcination, B. Composites, C. Thermal expansion, E. Fuel cells",
author = "Rahman, {Hamimah Abd} and Andanastuti Muchtar and Norhamidi Muhamad and Huda Abdullah",
year = "2012",
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T1 - Structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate composite cathodes for intermediate- to low-temperature solid oxide fuel cells

AU - Rahman, Hamimah Abd

AU - Muchtar, Andanastuti

AU - Muhamad, Norhamidi

AU - Abdullah, Huda

PY - 2012/3

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N2 - The structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate (LSCF-SDC carbonate) composite cathodes were investigated with respect to the calcination temperatures and the weight content of the samarium-doped ceria (SDC) carbonate electrolyte. The composite cathode powder has been prepared from La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ and SDC carbonate powders using the high-energy ball milling technique in air at room temperature. Different powder mixtures at 30 wt%, 40 wt% and 50 wt% of SDC carbonate were calcined at 750-900 °C. The findings indicated that the structure and thermal properties of the composite cathodes were responsive to the calcination temperature and the content of SDC carbonate. The absence of any new phases as confirmed via XRD analysis demonstrated the excellent compatibility between the cathode and electrolyte materials. The particle size of the composite cathode powder was ∼0.3-0.9 μm having a surface area of 4-15 m 2 g -1. SEM investigation revealed the presence of large particles in the resultant powders resulting from the increased calcination temperature. The composite cathode containing 50 wt% SDC carbonate was found to exhibit the best thermal expansion compatibility with the electrolyte.

AB - The structure and thermal properties of La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ-SDC carbonate (LSCF-SDC carbonate) composite cathodes were investigated with respect to the calcination temperatures and the weight content of the samarium-doped ceria (SDC) carbonate electrolyte. The composite cathode powder has been prepared from La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ and SDC carbonate powders using the high-energy ball milling technique in air at room temperature. Different powder mixtures at 30 wt%, 40 wt% and 50 wt% of SDC carbonate were calcined at 750-900 °C. The findings indicated that the structure and thermal properties of the composite cathodes were responsive to the calcination temperature and the content of SDC carbonate. The absence of any new phases as confirmed via XRD analysis demonstrated the excellent compatibility between the cathode and electrolyte materials. The particle size of the composite cathode powder was ∼0.3-0.9 μm having a surface area of 4-15 m 2 g -1. SEM investigation revealed the presence of large particles in the resultant powders resulting from the increased calcination temperature. The composite cathode containing 50 wt% SDC carbonate was found to exhibit the best thermal expansion compatibility with the electrolyte.

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