Influence of silver addition on the morphological and thermal characteristics of Nickel Oxide-Samarium Doped Ceria Carbonate (NiO-SDCC) composite anode

Ng Kei Hoa, Hamimah Abd Rahman, Mahendra Rao Somalu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Addition of silver (Ag) as an electro-catalyst has been widely investigated to enhance the cathode performance for intermediate-to-low temperature solid oxide fuel cells. Ag is seldom incorporated into composite anode materials, especially for low temperature application. Therefore, this study aimed to investigate the effects of a small amount of Ag on the microstructure and thermal behaviour of nickel oxide-samarium-doped ceria carbonate (NiO-SDCC) composite pellets. A high-speed ball milling technique was employed to prepare the NiO-SDCC composite anode powder. Subsequently, a small amount of Ag (1, 3, and 5 wt.%) was added into NiO-SDCC composite powder via ball milling. The pellets were manually pressed and sintered at 600 °C. Characterisation of the composite anodes included X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), energy-dispersive spectroscopy, scanning electron microscopy, dilatometry and porosity measurement. NiO-SDCC maintained good chemical compatibility regardless of Ag loading. FTIR analysis also verified the presence of carbonates, suggesting that Ag did not influence the carbonate bonding in all NiO-SDCC. The porosity of all composite anodes was maintained within the satisfactory level for good anode performance (20%-40%). The thermal expansion of the composite samples matched well with the SDCC electrolyte. This finding indicated that the addition of small Ag loading into NiO-SDCC was within the acceptable range, demonstrating promising potential as low-temperature solid oxide fuel cell composite anode.

Original languageEnglish
Pages (from-to)196-201
Number of pages6
JournalInternational Journal of Integrated Engineering
Volume10
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Samarium
Nickel oxide
Carbonates
Cerium compounds
Silver
Anodes
Composite materials
Ball milling
Solid oxide fuel cells (SOFC)
Powders
Fourier transform infrared spectroscopy
Porosity
Hot Temperature
nickel monoxide
Temperature
Electrolytes
Thermal expansion
Energy dispersive spectroscopy
Cathodes
X ray diffraction

Keywords

  • Composite anode
  • Electrocatalyst
  • Nickel oxide (NiO)
  • Samarium doped-ceria carbonate (SDCC)
  • Silver

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

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title = "Influence of silver addition on the morphological and thermal characteristics of Nickel Oxide-Samarium Doped Ceria Carbonate (NiO-SDCC) composite anode",
abstract = "Addition of silver (Ag) as an electro-catalyst has been widely investigated to enhance the cathode performance for intermediate-to-low temperature solid oxide fuel cells. Ag is seldom incorporated into composite anode materials, especially for low temperature application. Therefore, this study aimed to investigate the effects of a small amount of Ag on the microstructure and thermal behaviour of nickel oxide-samarium-doped ceria carbonate (NiO-SDCC) composite pellets. A high-speed ball milling technique was employed to prepare the NiO-SDCC composite anode powder. Subsequently, a small amount of Ag (1, 3, and 5 wt.{\%}) was added into NiO-SDCC composite powder via ball milling. The pellets were manually pressed and sintered at 600 °C. Characterisation of the composite anodes included X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), energy-dispersive spectroscopy, scanning electron microscopy, dilatometry and porosity measurement. NiO-SDCC maintained good chemical compatibility regardless of Ag loading. FTIR analysis also verified the presence of carbonates, suggesting that Ag did not influence the carbonate bonding in all NiO-SDCC. The porosity of all composite anodes was maintained within the satisfactory level for good anode performance (20{\%}-40{\%}). The thermal expansion of the composite samples matched well with the SDCC electrolyte. This finding indicated that the addition of small Ag loading into NiO-SDCC was within the acceptable range, demonstrating promising potential as low-temperature solid oxide fuel cell composite anode.",
keywords = "Composite anode, Electrocatalyst, Nickel oxide (NiO), Samarium doped-ceria carbonate (SDCC), Silver",
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AU - Rahman, Hamimah Abd

AU - Somalu, Mahendra Rao

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N2 - Addition of silver (Ag) as an electro-catalyst has been widely investigated to enhance the cathode performance for intermediate-to-low temperature solid oxide fuel cells. Ag is seldom incorporated into composite anode materials, especially for low temperature application. Therefore, this study aimed to investigate the effects of a small amount of Ag on the microstructure and thermal behaviour of nickel oxide-samarium-doped ceria carbonate (NiO-SDCC) composite pellets. A high-speed ball milling technique was employed to prepare the NiO-SDCC composite anode powder. Subsequently, a small amount of Ag (1, 3, and 5 wt.%) was added into NiO-SDCC composite powder via ball milling. The pellets were manually pressed and sintered at 600 °C. Characterisation of the composite anodes included X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), energy-dispersive spectroscopy, scanning electron microscopy, dilatometry and porosity measurement. NiO-SDCC maintained good chemical compatibility regardless of Ag loading. FTIR analysis also verified the presence of carbonates, suggesting that Ag did not influence the carbonate bonding in all NiO-SDCC. The porosity of all composite anodes was maintained within the satisfactory level for good anode performance (20%-40%). The thermal expansion of the composite samples matched well with the SDCC electrolyte. This finding indicated that the addition of small Ag loading into NiO-SDCC was within the acceptable range, demonstrating promising potential as low-temperature solid oxide fuel cell composite anode.

AB - Addition of silver (Ag) as an electro-catalyst has been widely investigated to enhance the cathode performance for intermediate-to-low temperature solid oxide fuel cells. Ag is seldom incorporated into composite anode materials, especially for low temperature application. Therefore, this study aimed to investigate the effects of a small amount of Ag on the microstructure and thermal behaviour of nickel oxide-samarium-doped ceria carbonate (NiO-SDCC) composite pellets. A high-speed ball milling technique was employed to prepare the NiO-SDCC composite anode powder. Subsequently, a small amount of Ag (1, 3, and 5 wt.%) was added into NiO-SDCC composite powder via ball milling. The pellets were manually pressed and sintered at 600 °C. Characterisation of the composite anodes included X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), energy-dispersive spectroscopy, scanning electron microscopy, dilatometry and porosity measurement. NiO-SDCC maintained good chemical compatibility regardless of Ag loading. FTIR analysis also verified the presence of carbonates, suggesting that Ag did not influence the carbonate bonding in all NiO-SDCC. The porosity of all composite anodes was maintained within the satisfactory level for good anode performance (20%-40%). The thermal expansion of the composite samples matched well with the SDCC electrolyte. This finding indicated that the addition of small Ag loading into NiO-SDCC was within the acceptable range, demonstrating promising potential as low-temperature solid oxide fuel cell composite anode.

KW - Composite anode

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KW - Samarium doped-ceria carbonate (SDCC)

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