Abstract
Lattice parameters, microstructures, thermal expansion coefficients and electrical conductivities of Ga-doped La0.6Sr0.4CoO 3-y were investigated in order to characterize influences of interdiffusion of Ga from La(Sr)Ga(Mg)O3-y electrolyte into La 0.6Sr0.4CoO3-y cathode in intermediate temperature solid oxide fuel cell. Unknown phases were formed when the amount of Ga doped was beyond 20% of B-site cation in the perovskite structure. In the single-phase region, the lattice parameters and thermal expansion coefficients were increased with the Ga doping. The thermal expansion coefficient increases were much higher than those of La(Sr)Ga(Mg)O3-y electrolyte. The electrical conductivities decreased with an increase in the doped amount of Ga, and the electrical conduction changed from metallic to semiconductor-like with the Ga doping. Those results clearly indicate that the interdiffusion of Ga into La0.6Sr0.4CoO3-y cathode has unfavorable influences on the physicochemical properties of La0.6Sr 0.4CoO3-y in the intermediate temperature solid oxide fuel cell.
| Original language | English |
|---|---|
| Pages (from-to) | 57-61 |
| Number of pages | 5 |
| Journal | Solid State Ionics |
| Volume | 172 |
| Issue number | 1-4 SPEC. ISS. |
| DOIs | |
| Publication status | Published - Aug 31 2004 |
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Keywords
- Electrical properties
- Electrode
- Interfacial reaction
- SOFC
- Thermal expansion
ASJC Scopus subject areas
- Electrochemistry
- Physical and Theoretical Chemistry
- Energy Engineering and Power Technology
- Materials Chemistry
- Condensed Matter Physics
Cite this
Influences of Ga doping on lattice parameter, microstructure, thermal expansion coefficient and electrical conductivity of La0.6Sr 0.4CoO3-y. / Matsuda, Motohide; Ihara, Kouhei; Miyake, Michihiro.
In: Solid State Ionics, Vol. 172, No. 1-4 SPEC. ISS., 31.08.2004, p. 57-61.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influences of Ga doping on lattice parameter, microstructure, thermal expansion coefficient and electrical conductivity of La0.6Sr 0.4CoO3-y
AU - Matsuda, Motohide
AU - Ihara, Kouhei
AU - Miyake, Michihiro
PY - 2004/8/31
Y1 - 2004/8/31
N2 - Lattice parameters, microstructures, thermal expansion coefficients and electrical conductivities of Ga-doped La0.6Sr0.4CoO 3-y were investigated in order to characterize influences of interdiffusion of Ga from La(Sr)Ga(Mg)O3-y electrolyte into La 0.6Sr0.4CoO3-y cathode in intermediate temperature solid oxide fuel cell. Unknown phases were formed when the amount of Ga doped was beyond 20% of B-site cation in the perovskite structure. In the single-phase region, the lattice parameters and thermal expansion coefficients were increased with the Ga doping. The thermal expansion coefficient increases were much higher than those of La(Sr)Ga(Mg)O3-y electrolyte. The electrical conductivities decreased with an increase in the doped amount of Ga, and the electrical conduction changed from metallic to semiconductor-like with the Ga doping. Those results clearly indicate that the interdiffusion of Ga into La0.6Sr0.4CoO3-y cathode has unfavorable influences on the physicochemical properties of La0.6Sr 0.4CoO3-y in the intermediate temperature solid oxide fuel cell.
AB - Lattice parameters, microstructures, thermal expansion coefficients and electrical conductivities of Ga-doped La0.6Sr0.4CoO 3-y were investigated in order to characterize influences of interdiffusion of Ga from La(Sr)Ga(Mg)O3-y electrolyte into La 0.6Sr0.4CoO3-y cathode in intermediate temperature solid oxide fuel cell. Unknown phases were formed when the amount of Ga doped was beyond 20% of B-site cation in the perovskite structure. In the single-phase region, the lattice parameters and thermal expansion coefficients were increased with the Ga doping. The thermal expansion coefficient increases were much higher than those of La(Sr)Ga(Mg)O3-y electrolyte. The electrical conductivities decreased with an increase in the doped amount of Ga, and the electrical conduction changed from metallic to semiconductor-like with the Ga doping. Those results clearly indicate that the interdiffusion of Ga into La0.6Sr0.4CoO3-y cathode has unfavorable influences on the physicochemical properties of La0.6Sr 0.4CoO3-y in the intermediate temperature solid oxide fuel cell.
KW - Electrical properties
KW - Electrode
KW - Interfacial reaction
KW - SOFC
KW - Thermal expansion
UR - http://www.scopus.com/inward/record.url?scp=7644239900&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=7644239900&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2004.02.030
DO - 10.1016/j.ssi.2004.02.030
M3 - Article
AN - SCOPUS:7644239900
VL - 172
SP - 57
EP - 61
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 1-4 SPEC. ISS.
ER -