Enhanced ionic conductivity of scandia-ceria-stabilized-zirconia (10Sc1CeSZ) electrolyte synthesized by the microwave-assisted glycine nitrate process

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Title: Enhanced ionic conductivity of scandia-ceria-stabilized-zirconia (10Sc1CeSZ) electrolyte synthesized by the microwave-assisted glycine nitrate process
Author(s): Jais, AA
Ali, SAM
Anwar, M
Somalu, MR
Muchtar, A
Isahak, WNRW
Tan, CY
Singh, R
Brandon, NP
Item Type: Journal Article
Abstract: Scandia-stabilized-zirconia is a potential zirconia-based electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs). In this study, the properties of zirconia co-doped with 10 mol% Sc and 1 mol% Ce (scandia-ceria-stabilized-zirconia, 10Sc1CeSZ) electrolyte synthesized by the microwave-assisted glycine nitrate process (MW-GNP) were determined. The effects of microwave heating on the sintering temperature, microstructure, densification and ionic conductivity of the 10Sc1CeSZ electrolyte were evaluated. The phase identification, microstructure and specific surface area of the prepared powder were investigated using X-ray diffraction, transmission electron microscopy and the Brunauer-Emmett-Teller technique, respectively. Using microwave heating, a single cubic-phase powder was produced with nanosized crystallites (19.2 nm) and a high specific surface area (16 m2/g). It was found that the relative density, porosity and total ionic conductivity of the 10Sc1CeSZ electrolyte are remarkably influenced by the powder processing method and the sintering temperature. The pellet sintered at 1400 °C exhibited a maximum ionic conductivity of 0.184 S/cm at 800 °C. This is the highest conductivity value of a scandia-stabilized-zirconia based electrolyte reported in the literature for this electrolyte type. The corresponding value of the activation energy of electrical conductivity was found to be 0.94 eV in the temperature range of 500–800 °C. Overall, the use of microwave heating has successfully improved the properties of the 10Sc1CeSZ electrolyte for application in an IT-SOFC.
Publication Date: 22-Mar-2017
Date of Acceptance: 21-Mar-2017
URI: http://hdl.handle.net/10044/1/52052
DOI: 10.1016/j.ceramint.2017.03.135
ISSN: 0272-8842
Publisher: Elsevier
Start Page: 8119
End Page: 8125
Journal / Book Title: Ceramics International
Volume: 43
Issue: 11
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/P024807/1
Keywords: Science & Technology
Technology
Materials Science, Ceramics
Materials Science
Microwave processing
Sintering
Ionic conductivity
Fuel cells
OXIDE FUEL-CELLS
DOPED ZIRCONIA
ELECTRICAL-CONDUCTIVITY
SOLID-ELECTROLYTE
PHASE-STABILITY
POWDERS
SOFCS
NANOPARTICLES
PERFORMANCE
BEHAVIOR
Science & Technology
Technology
Materials Science, Ceramics
Materials Science
Microwave processing
Sintering
Ionic conductivity
Fuel cells
OXIDE FUEL-CELLS
DOPED ZIRCONIA
ELECTRICAL-CONDUCTIVITY
SOLID-ELECTROLYTE
PHASE-STABILITY
POWDERS
SOFCS
NANOPARTICLES
PERFORMANCE
BEHAVIOR
03 Chemical Sciences
09 Engineering
19 Studies In Creative Arts And Writing
Materials
Publication Status: Published
Appears in Collections:Faculty of Engineering



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