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Abstract:
SmBaCo2O5+delta (SBCO) was synthesized as a cathode material for intermediate temperature solid oxide fuel cells (IT-SOFC) via the EDTA-glycine process. The structure and properties of the material were measured by thermogravimetry-differential thermal analysis (TG-DTA), X-ray diffractometry (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), four-probe DC method, and AC impedance spectroscopy. The results indicated that a stable perovskite phase was formed after the initial powder was calcined at 850 degrees C for 5 h. The obtained powders revealed fine particles with good dispersion and homogeneous size distribution. SBCO had excellent high temperature chemical compatibility with Sm0.2Ce0.8O1.9 (SDC) electrolyte. The electrical conductivities of the SBCO reached 668-382 S.cm(-1) in the temperature range 500-800 degrees C. A symmetric half cell with SDC as electrolyte and SBCO as electrode was characterized by good three-phase interface bonding and high cathode catalytic activity. A polarization resistance of 0.0688 Omega.cm(2) was achieved at 750 degrees C for the SBCO, far below that of SBCO synthesized by solid state reaction method (SSR), with an activation energy (E-a) of 122.21 kJ.mol(-1).
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ACTA PHYSICO-CHIMICA SINICA
ISSN: 1000-6818
CN: 11-1892/O6
Year: 2013
Issue: 12
Volume: 29
Page: 2585-2591
0 . 8 8 6
JCR@2013
1 0 . 8 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:4
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 1
SCOPUS Cited Count: 1
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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