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High temperature phase stabilities and electrochemical properties of InBaCo4-xZnxO7 cathodes for intermediate temperature solid oxide fuel cells

Identifieur interne : 002D52 ( Main/Repository ); précédent : 002D51; suivant : 002D53

High temperature phase stabilities and electrochemical properties of InBaCo4-xZnxO7 cathodes for intermediate temperature solid oxide fuel cells

Auteurs : RBID : Pascal:12-0052808

Descripteurs français

English descriptors

Abstract

InBaCo4-xZnxO7 oxides have been synthesized and characterized as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFC). The effect of Zn substitution for Co on the structure, phase stability, thermal expansion, and electrochemical properties of the InBaCo4-xZnxO7 has been investigated. The increase in the Zn content from x = 1 to 1.5 improves the high temperature phase stability at 600 C and 700°C for 100 h, and chemical stability against a Gd0.2Ce0.8O1.9 (GDC) electrolyte. Thermal expansion coefficient (TEC) values of the InBaCo4-xZnxO7 (x = 1, 1.5, 2) specimens were determined to be 8.6 x 10-6 to 9.6 x 10-6/°C in the range of 80-900°C, which provides good thermal expansion compatibility with the standard SOFC electrolyte materials. The InBaCo4-xZnxO7 + GDC (50:50wt.%) composite cathodes exhibit improved cathode performances compared to those obtained from the simple InBaCo4-xZnxO7 cathodes due to the extended triple-phase boundary (TPB) and enhanced oxide-ion conductivity through the GDC portion in the composites.

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Pascal:12-0052808

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<title xml:lang="en" level="a">High temperature phase stabilities and electrochemical properties of InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
cathodes for intermediate temperature solid oxide fuel cells</title>
<author>
<name sortKey="Kim, Jung Hyun" uniqKey="Kim J">Jung-Hyun Kim</name>
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<inist:fA14 i1="01">
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<name>YOUNG NAM KIM</name>
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<s2>Austin, TX 78712</s2>
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<name>ZHONGHE BI</name>
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<name sortKey="Huq, Ashfia" uniqKey="Huq A">Ashfia Huq</name>
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<term>Barium Oxides</term>
<term>Cathode</term>
<term>Chemical stability</term>
<term>Cobalt Oxides</term>
<term>Electrical conductivity</term>
<term>Electrochemical impedance spectroscopy</term>
<term>Electrode material</term>
<term>Indium Oxides</term>
<term>Lattice parameters</term>
<term>Morphology</term>
<term>Multi-element compound</term>
<term>Operating conditions</term>
<term>Property composition relationship</term>
<term>Scanning electron microscopy</term>
<term>Solid oxide fuel cell</term>
<term>Surface structure</term>
<term>Temperature range 400-1000 K</term>
<term>Thermal properties</term>
<term>X ray diffraction</term>
<term>Zinc Oxides</term>
</keywords>
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<term>Composé n éléments</term>
<term>Indium Oxyde</term>
<term>Baryum Oxyde</term>
<term>Cathode</term>
<term>Pile combustible oxyde solide</term>
<term>Domaine température 400-1000 K</term>
<term>Diffraction RX</term>
<term>Zinc Oxyde</term>
<term>Cobalt Oxyde</term>
<term>Relation composition propriété</term>
<term>Paramètre cristallin</term>
<term>Stabilité chimique</term>
<term>Microscopie électronique balayage</term>
<term>Propriété thermique</term>
<term>Conductivité électrique</term>
<term>Spectrométrie impédance électrochimique</term>
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<div type="abstract" xml:lang="en">InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
oxides have been synthesized and characterized as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFC). The effect of Zn substitution for Co on the structure, phase stability, thermal expansion, and electrochemical properties of the InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
has been investigated. The increase in the Zn content from x = 1 to 1.5 improves the high temperature phase stability at 600 C and 700°C for 100 h, and chemical stability against a Gd
<sub>0.2</sub>
Ce
<sub>0.8</sub>
O
<sub>1.9</sub>
(GDC) electrolyte. Thermal expansion coefficient (TEC) values of the InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
(x = 1, 1.5, 2) specimens were determined to be 8.6 x 10
<sup>-6</sup>
to 9.6 x 10
<sup>-6</sup>
/°C in the range of 80-900°C, which provides good thermal expansion compatibility with the standard SOFC electrolyte materials. The InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
+ GDC (50:50wt.%) composite cathodes exhibit improved cathode performances compared to those obtained from the simple InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
cathodes due to the extended triple-phase boundary (TPB) and enhanced oxide-ion conductivity through the GDC portion in the composites.</div>
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<s1>High temperature phase stabilities and electrochemical properties of InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
cathodes for intermediate temperature solid oxide fuel cells</s1>
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<s1>ZHONGHE BI</s1>
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<s1>MANTHIRAM (Arumugam)</s1>
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<fA11 i1="05" i2="1">
<s1>PARANS PARANTHAMAN (M.)</s1>
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<s1>HUQ (Ashfia)</s1>
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<fA14 i1="01">
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<sZ>1 aut.</sZ>
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<fA66 i1="01">
<s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
oxides have been synthesized and characterized as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFC). The effect of Zn substitution for Co on the structure, phase stability, thermal expansion, and electrochemical properties of the InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
has been investigated. The increase in the Zn content from x = 1 to 1.5 improves the high temperature phase stability at 600 C and 700°C for 100 h, and chemical stability against a Gd
<sub>0.2</sub>
Ce
<sub>0.8</sub>
O
<sub>1.9</sub>
(GDC) electrolyte. Thermal expansion coefficient (TEC) values of the InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
(x = 1, 1.5, 2) specimens were determined to be 8.6 x 10
<sup>-6</sup>
to 9.6 x 10
<sup>-6</sup>
/°C in the range of 80-900°C, which provides good thermal expansion compatibility with the standard SOFC electrolyte materials. The InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
+ GDC (50:50wt.%) composite cathodes exhibit improved cathode performances compared to those obtained from the simple InBaCo
<sub>4-x</sub>
Zn
<sub>x</sub>
O
<sub>7</sub>
cathodes due to the extended triple-phase boundary (TPB) and enhanced oxide-ion conductivity through the GDC portion in the composites.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>001D06D03E</s0>
</fC02>
<fC02 i1="02" i2="X">
<s0>230</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Composé n éléments</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Multi-element compound</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Compuesto n elementos</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Indium Oxyde</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Indium Oxides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Indio Óxido</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Baryum Oxyde</s0>
<s2>NC</s2>
<s2>FX</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Barium Oxides</s0>
<s2>NC</s2>
<s2>FX</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Bario Óxido</s0>
<s2>NC</s2>
<s2>FX</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE">
<s0>Cathode</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG">
<s0>Cathode</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Cátodo</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Pile combustible oxyde solide</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Solid oxide fuel cell</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Pila combustible oxido sólido</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE">
<s0>Domaine température 400-1000 K</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG">
<s0>Temperature range 400-1000 K</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Diffraction RX</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>X ray diffraction</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Difracción RX</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE">
<s0>Zinc Oxyde</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG">
<s0>Zinc Oxides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA">
<s0>Zinc Óxido</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE">
<s0>Cobalt Oxyde</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG">
<s0>Cobalt Oxides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA">
<s0>Cobalto Óxido</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE">
<s0>Relation composition propriété</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG">
<s0>Property composition relationship</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA">
<s0>Relación composición propiedad</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE">
<s0>Paramètre cristallin</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG">
<s0>Lattice parameters</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA">
<s0>Parámetro cristalino</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE">
<s0>Stabilité chimique</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG">
<s0>Chemical stability</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA">
<s0>Estabilidad química</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE">
<s0>Microscopie électronique balayage</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG">
<s0>Scanning electron microscopy</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA">
<s0>Microscopía electrónica barrido</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE">
<s0>Propriété thermique</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG">
<s0>Thermal properties</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA">
<s0>Propiedad térmica</s0>
<s5>14</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE">
<s0>Conductivité électrique</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG">
<s0>Electrical conductivity</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA">
<s0>Conductividad eléctrica</s0>
<s5>15</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE">
<s0>Spectrométrie impédance électrochimique</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="3" l="ENG">
<s0>Electrochemical impedance spectroscopy</s0>
<s5>16</s5>
</fC03>
<fC03 i1="17" i2="X" l="FRE">
<s0>Condition opératoire</s0>
<s5>32</s5>
</fC03>
<fC03 i1="17" i2="X" l="ENG">
<s0>Operating conditions</s0>
<s5>32</s5>
</fC03>
<fC03 i1="17" i2="X" l="SPA">
<s0>Condición operatoria</s0>
<s5>32</s5>
</fC03>
<fC03 i1="18" i2="X" l="FRE">
<s0>Matériau électrode</s0>
<s5>33</s5>
</fC03>
<fC03 i1="18" i2="X" l="ENG">
<s0>Electrode material</s0>
<s5>33</s5>
</fC03>
<fC03 i1="18" i2="X" l="SPA">
<s0>Material electrodo</s0>
<s5>33</s5>
</fC03>
<fC03 i1="19" i2="X" l="FRE">
<s0>Structure surface</s0>
<s5>34</s5>
</fC03>
<fC03 i1="19" i2="X" l="ENG">
<s0>Surface structure</s0>
<s5>34</s5>
</fC03>
<fC03 i1="19" i2="X" l="SPA">
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