Physical and electrochemical properties of (La0.3Sr 0.7)0.93TiO3-δ synthesized by Pechini method as an anode material for solid oxide fuel cells

Jin Goo Lee, Yong Gun Shul

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The lanthanum strontium titanate (LST) has to be calcined at significantly high temperature (above 1,300 C) to obtain its pure perovskite structure when synthesized by conventional solid-state method, which is main reason for reducing active surface area. In this study, A-site deficient (La 0.3Sr0.7)0.93TiO3 was synthesized by Pechini method. Although the prepared powders were calcined at 600 C, the pure perovskite structure can be obtained without any secondary phase such as TiO2. Moreover, the porosity and surface area are 6 times and one order of magnitude higher in the LST powders synthesized by Pechini method than in the powders synthesized by solid-state method. Based on these results, the LST electrode (Pechini) leads to two times lower electrode resistance than the LST electrode (solid-state). Thus, the LST powders synthesized by Pechini can contributes to saving the energy needed for calcination process as well as increasing the porosity and active surface area, enhancing physical and electrochemical properties in SOFC anode.

Original languageEnglish
Pages (from-to)148-154
Number of pages7
JournalJournal of Sol-Gel Science and Technology
Volume69
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Lanthanum
Strontium
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Electrochemical properties
lanthanum
strontium
Anodes
anodes
Physical properties
physical properties
Powders
solid state
Perovskite
Electrodes
electrodes
Porosity
porosity
Calcination
roasting

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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title = "Physical and electrochemical properties of (La0.3Sr 0.7)0.93TiO3-δ synthesized by Pechini method as an anode material for solid oxide fuel cells",
abstract = "The lanthanum strontium titanate (LST) has to be calcined at significantly high temperature (above 1,300 C) to obtain its pure perovskite structure when synthesized by conventional solid-state method, which is main reason for reducing active surface area. In this study, A-site deficient (La 0.3Sr0.7)0.93TiO3 was synthesized by Pechini method. Although the prepared powders were calcined at 600 C, the pure perovskite structure can be obtained without any secondary phase such as TiO2. Moreover, the porosity and surface area are 6 times and one order of magnitude higher in the LST powders synthesized by Pechini method than in the powders synthesized by solid-state method. Based on these results, the LST electrode (Pechini) leads to two times lower electrode resistance than the LST electrode (solid-state). Thus, the LST powders synthesized by Pechini can contributes to saving the energy needed for calcination process as well as increasing the porosity and active surface area, enhancing physical and electrochemical properties in SOFC anode.",
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AU - Lee, Jin Goo

AU - Shul, Yong Gun

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The lanthanum strontium titanate (LST) has to be calcined at significantly high temperature (above 1,300 C) to obtain its pure perovskite structure when synthesized by conventional solid-state method, which is main reason for reducing active surface area. In this study, A-site deficient (La 0.3Sr0.7)0.93TiO3 was synthesized by Pechini method. Although the prepared powders were calcined at 600 C, the pure perovskite structure can be obtained without any secondary phase such as TiO2. Moreover, the porosity and surface area are 6 times and one order of magnitude higher in the LST powders synthesized by Pechini method than in the powders synthesized by solid-state method. Based on these results, the LST electrode (Pechini) leads to two times lower electrode resistance than the LST electrode (solid-state). Thus, the LST powders synthesized by Pechini can contributes to saving the energy needed for calcination process as well as increasing the porosity and active surface area, enhancing physical and electrochemical properties in SOFC anode.

AB - The lanthanum strontium titanate (LST) has to be calcined at significantly high temperature (above 1,300 C) to obtain its pure perovskite structure when synthesized by conventional solid-state method, which is main reason for reducing active surface area. In this study, A-site deficient (La 0.3Sr0.7)0.93TiO3 was synthesized by Pechini method. Although the prepared powders were calcined at 600 C, the pure perovskite structure can be obtained without any secondary phase such as TiO2. Moreover, the porosity and surface area are 6 times and one order of magnitude higher in the LST powders synthesized by Pechini method than in the powders synthesized by solid-state method. Based on these results, the LST electrode (Pechini) leads to two times lower electrode resistance than the LST electrode (solid-state). Thus, the LST powders synthesized by Pechini can contributes to saving the energy needed for calcination process as well as increasing the porosity and active surface area, enhancing physical and electrochemical properties in SOFC anode.

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