Formation of sol–gel derived (Cu,Mn,Co)3O4 spinel and its electrical properties

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

An (Mn,Co)3O4 spinel layer effectively suppresses Cr outward diffusion, but the occurrence of spallation between coating and metal interfaces and the increasing oxidation rate over time significantly deteriorate cell performance. A transition metal cation, particularly Cu, is added into the (Mn,Co)3O4 to improve the long-term stability of the interconnect materials for low-to-intermediate-temperature solid oxide fuel cells (SOFCs). In this work, fine-crystalline (Cu,Mn,Co)3O4 spinel powders with an average crystallite size of 21 nm were successfully synthesized via the citric acid–nitrate method. The potential for use as a coating material for low-to-intermediate-temperature SOFC interconnects was explored. According to the TG curves, IR spectra, and XRD patterns, 800 °C is recommended as the minimum calcination temperature for (Cu,Mn,Co)3O4 spinel materials. Compared with (Mn,Co)3O4 spinel materials, the addition of Cu does not induce significant changes in the crystal structure but markedly improves the electrical conductivity (116 Scm−1) and the activation energy (0.394 eV) of the (Cu,Mn,Co)3O4 spinel. Overall, the sol–gel derived (Cu,Mn,Co)3O4 spinel can be used as a coating material for low-to-intermediate-temperature SOFC interconnects and is superior to (Mn,Co)3O4 spinel because high electrical conductivity is preferred to minimize ohmic losses between the electrodes of adjacent cells.

Original languageEnglish
Pages (from-to)7641-7646
Number of pages6
JournalCeramics International
Volume43
Issue number10
DOIs
Publication statusPublished - 1 Jul 2017

Fingerprint

Electric properties
Solid oxide fuel cells (SOFC)
Coatings
Temperature
Crystallite size
Calcination
Transition metals
Activation energy
Crystal structure
Positive ions
spinell
Crystalline materials
Powders
Oxidation
Cations
Electrodes
Metals
Electric Conductivity

Keywords

  • A. Solid oxide fuel cell
  • B. Interconnects
  • C. Spinel
  • D. Sol-gel
  • E. Electrical properties

ASJC Scopus subject areas

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

Cite this

Formation of sol–gel derived (Cu,Mn,Co)3O4 spinel and its electrical properties. / Mah, Joelle C W; Muchtar, Andanastuti; Somalu, Mahendra Rao; Ghazali, Mariyam Jameelah; Raharjo, Jarot.

In: Ceramics International, Vol. 43, No. 10, 01.07.2017, p. 7641-7646.

Research output: Contribution to journalArticle

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abstract = "An (Mn,Co)3O4 spinel layer effectively suppresses Cr outward diffusion, but the occurrence of spallation between coating and metal interfaces and the increasing oxidation rate over time significantly deteriorate cell performance. A transition metal cation, particularly Cu, is added into the (Mn,Co)3O4 to improve the long-term stability of the interconnect materials for low-to-intermediate-temperature solid oxide fuel cells (SOFCs). In this work, fine-crystalline (Cu,Mn,Co)3O4 spinel powders with an average crystallite size of 21 nm were successfully synthesized via the citric acid–nitrate method. The potential for use as a coating material for low-to-intermediate-temperature SOFC interconnects was explored. According to the TG curves, IR spectra, and XRD patterns, 800 °C is recommended as the minimum calcination temperature for (Cu,Mn,Co)3O4 spinel materials. Compared with (Mn,Co)3O4 spinel materials, the addition of Cu does not induce significant changes in the crystal structure but markedly improves the electrical conductivity (116 Scm−1) and the activation energy (0.394 eV) of the (Cu,Mn,Co)3O4 spinel. Overall, the sol–gel derived (Cu,Mn,Co)3O4 spinel can be used as a coating material for low-to-intermediate-temperature SOFC interconnects and is superior to (Mn,Co)3O4 spinel because high electrical conductivity is preferred to minimize ohmic losses between the electrodes of adjacent cells.",
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AU - Muchtar, Andanastuti

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AU - Ghazali, Mariyam Jameelah

AU - Raharjo, Jarot

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N2 - An (Mn,Co)3O4 spinel layer effectively suppresses Cr outward diffusion, but the occurrence of spallation between coating and metal interfaces and the increasing oxidation rate over time significantly deteriorate cell performance. A transition metal cation, particularly Cu, is added into the (Mn,Co)3O4 to improve the long-term stability of the interconnect materials for low-to-intermediate-temperature solid oxide fuel cells (SOFCs). In this work, fine-crystalline (Cu,Mn,Co)3O4 spinel powders with an average crystallite size of 21 nm were successfully synthesized via the citric acid–nitrate method. The potential for use as a coating material for low-to-intermediate-temperature SOFC interconnects was explored. According to the TG curves, IR spectra, and XRD patterns, 800 °C is recommended as the minimum calcination temperature for (Cu,Mn,Co)3O4 spinel materials. Compared with (Mn,Co)3O4 spinel materials, the addition of Cu does not induce significant changes in the crystal structure but markedly improves the electrical conductivity (116 Scm−1) and the activation energy (0.394 eV) of the (Cu,Mn,Co)3O4 spinel. Overall, the sol–gel derived (Cu,Mn,Co)3O4 spinel can be used as a coating material for low-to-intermediate-temperature SOFC interconnects and is superior to (Mn,Co)3O4 spinel because high electrical conductivity is preferred to minimize ohmic losses between the electrodes of adjacent cells.

AB - An (Mn,Co)3O4 spinel layer effectively suppresses Cr outward diffusion, but the occurrence of spallation between coating and metal interfaces and the increasing oxidation rate over time significantly deteriorate cell performance. A transition metal cation, particularly Cu, is added into the (Mn,Co)3O4 to improve the long-term stability of the interconnect materials for low-to-intermediate-temperature solid oxide fuel cells (SOFCs). In this work, fine-crystalline (Cu,Mn,Co)3O4 spinel powders with an average crystallite size of 21 nm were successfully synthesized via the citric acid–nitrate method. The potential for use as a coating material for low-to-intermediate-temperature SOFC interconnects was explored. According to the TG curves, IR spectra, and XRD patterns, 800 °C is recommended as the minimum calcination temperature for (Cu,Mn,Co)3O4 spinel materials. Compared with (Mn,Co)3O4 spinel materials, the addition of Cu does not induce significant changes in the crystal structure but markedly improves the electrical conductivity (116 Scm−1) and the activation energy (0.394 eV) of the (Cu,Mn,Co)3O4 spinel. Overall, the sol–gel derived (Cu,Mn,Co)3O4 spinel can be used as a coating material for low-to-intermediate-temperature SOFC interconnects and is superior to (Mn,Co)3O4 spinel because high electrical conductivity is preferred to minimize ohmic losses between the electrodes of adjacent cells.

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