La0.6Sr0.4Co0.2Fe0.8O 3-δ-SDC carbonate composite cathodes for low-temperature solid oxide fuel cells

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Abstract

Composite cathodes with La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) and samarium-doped ceria carbonate (SDCC) were developed and investigated for solid oxide fuel cell (SOFC) applications at low operating temperatures. The LSCF-SDCC (50 wt% LSCF:50 wt% SDCC) composite cathode powders were mixed by the ball-milling technique followed by calcination at 700, 750, 800, and 850 C for 2 h. To fabricate single SOFCs using LSCF-SDCC as the cathode, SDCC as the electrolyte, and NiO-SDCC as the anode, a single-step pressing and co-firing process was employed. The electrolyte-supported button cells were tested between 475 and 550 C. The composite cathode exhibited well-matched TEC values with the SDCC electrolyte. Calcination at lower temperatures (700 and 750 C) produced powders with surface areas of 10 m2 g-1-11 m2 g-1. Using LSCF-SDCC powders sintered at 700 and 750 C to fabricate button cells resulted in power densities of 117.9 and 120.4 mW cm-2, respectively, at an operation temperature of 550 C with the latter cathode yielding the lowest Rp value.

Original languageEnglish
Pages (from-to)752-757
Number of pages6
JournalMaterials Chemistry and Physics
Volume141
Issue number2-3
DOIs
Publication statusPublished - 16 Sep 2013

Fingerprint

Samarium
samarium
Carbonates
Cerium compounds
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
carbonates
Cathodes
cathodes
composite materials
Powders
Electrolytes
Composite materials
buttons
electrolytes
Calcination
roasting
Temperature
Ball milling
pressing

Keywords

  • Composite materials
  • Electrochemical properties
  • Sintering
  • Thermal expansion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "La0.6Sr0.4Co0.2Fe0.8O 3-δ-SDC carbonate composite cathodes for low-temperature solid oxide fuel cells",
abstract = "Composite cathodes with La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) and samarium-doped ceria carbonate (SDCC) were developed and investigated for solid oxide fuel cell (SOFC) applications at low operating temperatures. The LSCF-SDCC (50 wt{\%} LSCF:50 wt{\%} SDCC) composite cathode powders were mixed by the ball-milling technique followed by calcination at 700, 750, 800, and 850 C for 2 h. To fabricate single SOFCs using LSCF-SDCC as the cathode, SDCC as the electrolyte, and NiO-SDCC as the anode, a single-step pressing and co-firing process was employed. The electrolyte-supported button cells were tested between 475 and 550 C. The composite cathode exhibited well-matched TEC values with the SDCC electrolyte. Calcination at lower temperatures (700 and 750 C) produced powders with surface areas of 10 m2 g-1-11 m2 g-1. Using LSCF-SDCC powders sintered at 700 and 750 C to fabricate button cells resulted in power densities of 117.9 and 120.4 mW cm-2, respectively, at an operation temperature of 550 C with the latter cathode yielding the lowest Rp value.",
keywords = "Composite materials, Electrochemical properties, Sintering, Thermal expansion",
author = "Rahman, {Hamimah Abd} and Andanastuti Muchtar and Norhamidi Muhamad and Huda Abdullah",
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TY - JOUR

T1 - La0.6Sr0.4Co0.2Fe0.8O 3-δ-SDC carbonate composite cathodes for low-temperature solid oxide fuel cells

AU - Rahman, Hamimah Abd

AU - Muchtar, Andanastuti

AU - Muhamad, Norhamidi

AU - Abdullah, Huda

PY - 2013/9/16

Y1 - 2013/9/16

N2 - Composite cathodes with La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) and samarium-doped ceria carbonate (SDCC) were developed and investigated for solid oxide fuel cell (SOFC) applications at low operating temperatures. The LSCF-SDCC (50 wt% LSCF:50 wt% SDCC) composite cathode powders were mixed by the ball-milling technique followed by calcination at 700, 750, 800, and 850 C for 2 h. To fabricate single SOFCs using LSCF-SDCC as the cathode, SDCC as the electrolyte, and NiO-SDCC as the anode, a single-step pressing and co-firing process was employed. The electrolyte-supported button cells were tested between 475 and 550 C. The composite cathode exhibited well-matched TEC values with the SDCC electrolyte. Calcination at lower temperatures (700 and 750 C) produced powders with surface areas of 10 m2 g-1-11 m2 g-1. Using LSCF-SDCC powders sintered at 700 and 750 C to fabricate button cells resulted in power densities of 117.9 and 120.4 mW cm-2, respectively, at an operation temperature of 550 C with the latter cathode yielding the lowest Rp value.

AB - Composite cathodes with La0.6Sr0.4Co 0.2Fe0.8O3-δ (LSCF6428) and samarium-doped ceria carbonate (SDCC) were developed and investigated for solid oxide fuel cell (SOFC) applications at low operating temperatures. The LSCF-SDCC (50 wt% LSCF:50 wt% SDCC) composite cathode powders were mixed by the ball-milling technique followed by calcination at 700, 750, 800, and 850 C for 2 h. To fabricate single SOFCs using LSCF-SDCC as the cathode, SDCC as the electrolyte, and NiO-SDCC as the anode, a single-step pressing and co-firing process was employed. The electrolyte-supported button cells were tested between 475 and 550 C. The composite cathode exhibited well-matched TEC values with the SDCC electrolyte. Calcination at lower temperatures (700 and 750 C) produced powders with surface areas of 10 m2 g-1-11 m2 g-1. Using LSCF-SDCC powders sintered at 700 and 750 C to fabricate button cells resulted in power densities of 117.9 and 120.4 mW cm-2, respectively, at an operation temperature of 550 C with the latter cathode yielding the lowest Rp value.

KW - Composite materials

KW - Electrochemical properties

KW - Sintering

KW - Thermal expansion

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