Enhancement of the interfacial polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ cathode by microwave-assisted combustion method

S. A. Muhammed Ali, Mustafa Anwar, Mahendra Rao Somalu, Andanastuti Muchtar

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Thermogravimetry, phase formation, microstructural evolution, specific surface area, and electrical properties of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) cathode were studied as functions of its preparation technique. The pure perovskite LSCF cathode powder was synthesized through glycine–nitrate process (GNP) using microwave heating technique. Compared with conventional heating technique, microwave heating allows the rapid combustion to occur simultaneously between the nitrates and glycine in a controllable manner. The resulting powder is a single-phase nanocrystallite with a mean particle size of 113 nm and a high specific surface area of 12.2 m2/g, after calcination at 800 °C. Impedance analysis indicates that microwave heating has significantly reduced the polarization resistance of LSCF cathode. The area specific resistance (ASR) value of 0.059 and 0.097 Ω cm2 at 800 °C and 750 °C, respectively, were observed. These values were twofold lower than the corresponding ASR of the cathode (0.133 and 0.259 Ω cm2 at 800 °C and 750 °C, respectively) prepared through conventional heating. Results suggest that the microwave heating GNP strongly contributes to the enhancement of the LSCF cathode performance for intermediate temperature solid oxide fuel cells.

Original languageEnglish
Pages (from-to)4647-4654
Number of pages8
JournalCeramics International
Volume43
Issue number5
DOIs
Publication statusPublished - 1 Apr 2017

Fingerprint

Microwave heating
Cathodes
Microwaves
Polarization
Specific surface area
Powders
Heating
Industrial heating
Microstructural evolution
Solid oxide fuel cells (SOFC)
Nitrates
Perovskite
Calcination
Glycine
Thermogravimetric analysis
Amino acids
Electric properties
Particle size
Temperature

Keywords

  • A. Microwave processing
  • B. X-ray methods
  • C. Electrical properties
  • E. Fuel cells

ASJC Scopus subject areas

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

Cite this

Enhancement of the interfacial polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ cathode by microwave-assisted combustion method. / Muhammed Ali, S. A.; Anwar, Mustafa; Somalu, Mahendra Rao; Muchtar, Andanastuti.

In: Ceramics International, Vol. 43, No. 5, 01.04.2017, p. 4647-4654.

Research output: Contribution to journalArticle

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abstract = "Thermogravimetry, phase formation, microstructural evolution, specific surface area, and electrical properties of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) cathode were studied as functions of its preparation technique. The pure perovskite LSCF cathode powder was synthesized through glycine–nitrate process (GNP) using microwave heating technique. Compared with conventional heating technique, microwave heating allows the rapid combustion to occur simultaneously between the nitrates and glycine in a controllable manner. The resulting powder is a single-phase nanocrystallite with a mean particle size of 113 nm and a high specific surface area of 12.2 m2/g, after calcination at 800 °C. Impedance analysis indicates that microwave heating has significantly reduced the polarization resistance of LSCF cathode. The area specific resistance (ASR) value of 0.059 and 0.097 Ω cm2 at 800 °C and 750 °C, respectively, were observed. These values were twofold lower than the corresponding ASR of the cathode (0.133 and 0.259 Ω cm2 at 800 °C and 750 °C, respectively) prepared through conventional heating. Results suggest that the microwave heating GNP strongly contributes to the enhancement of the LSCF cathode performance for intermediate temperature solid oxide fuel cells.",
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AB - Thermogravimetry, phase formation, microstructural evolution, specific surface area, and electrical properties of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) cathode were studied as functions of its preparation technique. The pure perovskite LSCF cathode powder was synthesized through glycine–nitrate process (GNP) using microwave heating technique. Compared with conventional heating technique, microwave heating allows the rapid combustion to occur simultaneously between the nitrates and glycine in a controllable manner. The resulting powder is a single-phase nanocrystallite with a mean particle size of 113 nm and a high specific surface area of 12.2 m2/g, after calcination at 800 °C. Impedance analysis indicates that microwave heating has significantly reduced the polarization resistance of LSCF cathode. The area specific resistance (ASR) value of 0.059 and 0.097 Ω cm2 at 800 °C and 750 °C, respectively, were observed. These values were twofold lower than the corresponding ASR of the cathode (0.133 and 0.259 Ω cm2 at 800 °C and 750 °C, respectively) prepared through conventional heating. Results suggest that the microwave heating GNP strongly contributes to the enhancement of the LSCF cathode performance for intermediate temperature solid oxide fuel cells.

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