Structural, morphological, and electrochemical behavior of titanium-doped SrFe 1-x Ti x O 3-δ (x = 0.1–0.5) perovskite as a cobalt-free solid oxide fuel cell cathode

Nurul Akidah Baharuddin, Nurul Ashikin Mohd Nazrul Aman, Andanastuti Muchtar, Mahendra Rao Somalu, Abdullah Abdul Samat, Muhamad Isyraf Aznam

Research output: Contribution to journalArticle

Abstract

Titanium, Ti-doped SrFe 1-x Ti x O 3-δ (x = 0.1–0.5) perovskite-structured ceramics were synthesized via solution combustion. The structural, morphological, and electrochemical behaviors of the as-synthesized materials were investigated to determine the applicability of SrFe 1-x Ti x O 3-δ as a cobalt-free cathode material for intermediate-temperature solid oxide fuel cells. X-ray diffraction analysis confirmed the formation of a single-phase cubic perovskite structure. The unit volume of this perovskite structure increased as the amount of Ti dopant increased. Morphological analysis revealed that the porosity of the SrFe 1-x Ti x O 3-δ perovskite cathode film was inversely proportional to the amount of Ti dopant. The cathode SrFe 0·9 Ti 0·1 O 3-δ film exhibited a high porosity of 24.74 ± 0.52%, a low but acceptable hardness value of 0.70 ± 0.01 GPa and an area specific resistance of 0.57 Ω cm 2 . These results suggested that cobalt-free SrFe 1-x Ti x O 3-δ cathode was still not good enough to be compared with the existing cobalt-containing cathode such as lanthanum strontium cobalt ferrite. But, the results obtained from this work can be considered as a major turning point as the literature works on SrFe 1-x Ti x O 3-δ cathode showed excellence electrochemical performance. The contradict result between the present and past studies proved that the use of SrFe 1-x Ti x O 3-δ cathode is worthy of being studied into details to confirm its capability.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Cobalt
Titanium
Solid oxide fuel cells (SOFC)
Perovskite
Cathodes
Porosity
Doping (additives)
Lanthanum
Strontium
perovskite
X ray diffraction analysis
Ferrite
Hardness

Keywords

  • Cathode
  • Electrochemical impedance spectroscopy
  • Morphology
  • Perovskite
  • Solid oxide fuel cell

ASJC Scopus subject areas

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

Cite this

Structural, morphological, and electrochemical behavior of titanium-doped SrFe 1-x Ti x O 3-δ (x = 0.1–0.5) perovskite as a cobalt-free solid oxide fuel cell cathode . / Baharuddin, Nurul Akidah; Mohd Nazrul Aman, Nurul Ashikin; Muchtar, Andanastuti; Somalu, Mahendra Rao; Abdul Samat, Abdullah; Aznam, Muhamad Isyraf.

In: Ceramics International, 01.01.2019.

Research output: Contribution to journalArticle

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abstract = "Titanium, Ti-doped SrFe 1-x Ti x O 3-δ (x = 0.1–0.5) perovskite-structured ceramics were synthesized via solution combustion. The structural, morphological, and electrochemical behaviors of the as-synthesized materials were investigated to determine the applicability of SrFe 1-x Ti x O 3-δ as a cobalt-free cathode material for intermediate-temperature solid oxide fuel cells. X-ray diffraction analysis confirmed the formation of a single-phase cubic perovskite structure. The unit volume of this perovskite structure increased as the amount of Ti dopant increased. Morphological analysis revealed that the porosity of the SrFe 1-x Ti x O 3-δ perovskite cathode film was inversely proportional to the amount of Ti dopant. The cathode SrFe 0·9 Ti 0·1 O 3-δ film exhibited a high porosity of 24.74 ± 0.52{\%}, a low but acceptable hardness value of 0.70 ± 0.01 GPa and an area specific resistance of 0.57 Ω cm 2 . These results suggested that cobalt-free SrFe 1-x Ti x O 3-δ cathode was still not good enough to be compared with the existing cobalt-containing cathode such as lanthanum strontium cobalt ferrite. But, the results obtained from this work can be considered as a major turning point as the literature works on SrFe 1-x Ti x O 3-δ cathode showed excellence electrochemical performance. The contradict result between the present and past studies proved that the use of SrFe 1-x Ti x O 3-δ cathode is worthy of being studied into details to confirm its capability.",
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AU - Baharuddin, Nurul Akidah

AU - Mohd Nazrul Aman, Nurul Ashikin

AU - Muchtar, Andanastuti

AU - Somalu, Mahendra Rao

AU - Abdul Samat, Abdullah

AU - Aznam, Muhamad Isyraf

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AB - Titanium, Ti-doped SrFe 1-x Ti x O 3-δ (x = 0.1–0.5) perovskite-structured ceramics were synthesized via solution combustion. The structural, morphological, and electrochemical behaviors of the as-synthesized materials were investigated to determine the applicability of SrFe 1-x Ti x O 3-δ as a cobalt-free cathode material for intermediate-temperature solid oxide fuel cells. X-ray diffraction analysis confirmed the formation of a single-phase cubic perovskite structure. The unit volume of this perovskite structure increased as the amount of Ti dopant increased. Morphological analysis revealed that the porosity of the SrFe 1-x Ti x O 3-δ perovskite cathode film was inversely proportional to the amount of Ti dopant. The cathode SrFe 0·9 Ti 0·1 O 3-δ film exhibited a high porosity of 24.74 ± 0.52%, a low but acceptable hardness value of 0.70 ± 0.01 GPa and an area specific resistance of 0.57 Ω cm 2 . These results suggested that cobalt-free SrFe 1-x Ti x O 3-δ cathode was still not good enough to be compared with the existing cobalt-containing cathode such as lanthanum strontium cobalt ferrite. But, the results obtained from this work can be considered as a major turning point as the literature works on SrFe 1-x Ti x O 3-δ cathode showed excellence electrochemical performance. The contradict result between the present and past studies proved that the use of SrFe 1-x Ti x O 3-δ cathode is worthy of being studied into details to confirm its capability.

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