Synthesis and characterization of Sm1-xZrxFe1-yMgyO3 (x, y = 0.5, 0.7, 0.9) as possible electrolytes for SOFCs
Paper in proceedings, 2018

The novel perovskite oxide series of Sm 1-x Zr x Fe 1-y Mg y O 3 (x,y = 0.5, 0.7, 0.9) were synthesized by solid state reaction method. X-ray diffraction (XRD), Rietveld refinement, scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and conductivity analysis were carried out. XRD patterns of sintered materials revealed the shifted Bragg reflection to higher angle for the higher content of Zr and Mg. This is related to the ionic size of the dopant elements. Rietveld refinement showed that all compounds crystallized in cubic space group of Fm-3m. SEM images showed that the grains were well defined with highly dense surfaces makes it potential as an electrolyte material in solid oxide fuel cells (SOFCs) or gases sensors. Impedance spectroscopy at 550-800 °C shows that conductivity is higher at higher temperature. Sm 0.5 Zr 0.5 Fe 0.5 Mg 0.5 O 3 shows the highest conductivity of 5.451 × 10 -3 S cm -1 at 800 °C. It was observed that 50% molar ratio of Mg and Zr doping performed highest conductivity.

SOFCs

Dense material

SEM

Rietveld refinement

Perovskite oxides

Electrochemical performance

Author

Abdalla M. Abdalla

Universiti Brunei Darussalam

S. Hossain

Universiti Brunei Darussalam

N. Radenahmad

Universiti Brunei Darussalam

P. M. I. Petra

Universiti Brunei Darussalam

Mahendra R. Somalu

National University of Malaysia

Habibur Seikh Mohammad Rahman

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Sten Eriksson

Environmental Inorganic Chemistry 2

A. K. Azad

Universiti Brunei Darussalam

Key Engineering Materials

1013-9826 (ISSN)

Vol. 765 KEM 49-53

8th International Conference on Advanced Materials Research, ICAMR 2018
Fukuoka, Japan,

Subject Categories

Inorganic Chemistry

Ceramics

Materials Chemistry

DOI

10.4028/www.scientific.net/KEM.765.49

More information

Latest update

4/16/2018