Mixed electronic-oxide ionic conductor of BaCoO3 doped with La for cathode of intermediate-temperature-operating solid oxide fuel cell

Tatsumi Ishihara, Satoko Fukui, Hiroyasu Nishiguchi, Yusaku Takita

研究成果: ジャーナルへの寄稿記事

50 引用 (Scopus)

抄録

Mixed electronic-oxide ionic conductivity and the cathodic property of BaCoO3 doped with La was investigated in this study for a solid oxide fuel cell (SOFC) operating at intermediate temperature. The electrical conductivity of BaCoO3 increases systematically with increasing amounts of La doped for Ba site. Cathodic overpotential at 1073 K decreased with increasing La content and attained a minimum at X=0.3-0.4 in Ba1-XLaXCoO3. Since the cathodic overpotential of Ba0.6La0.4CoO3 was small at decreased temperature, Ba0.6La0.4CoO3 is the optimum composition for a cathode of intermediate-temperature fuel cells among BaCoO3-based oxides. Mixed conductivity and surface activity for oxygen dissociation was investigated with 18O-16O exchange reaction. It was found that BaCoO3 doped with La exhibits a large oxide ion conductivity and surface activity. When La0.8Sr0.2Ga0.8Mg0.115Co0.05 O3 (0.4 mm in thickness) was used as electrolyte, the power density of a cell using Ba0.6La0.4CoO3 for the cathode at 873 K attained a value of 120 mW/cm2, which is slightly larger than that using a conventional Sm0.5Sr0.5CoO3 oxide for the cathode.

元の言語英語
ページ(範囲)609-613
ページ数5
ジャーナルSolid State Ionics
152-153
DOI
出版物ステータス出版済み - 12 1 2002
外部発表Yes

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solid oxide fuel cells
Solid oxide fuel cells (SOFC)
operating temperature
Oxides
Cathodes
conductors
cathodes
oxides
electronics
conductivity
Temperature
Ionic conductivity
ion currents
Electrolytes
fuel cells
temperature
radiant flux density
Fuel cells
Ion exchange
electrolytes

All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

これを引用

Mixed electronic-oxide ionic conductor of BaCoO3 doped with La for cathode of intermediate-temperature-operating solid oxide fuel cell. / Ishihara, Tatsumi; Fukui, Satoko; Nishiguchi, Hiroyasu; Takita, Yusaku.

:: Solid State Ionics, 巻 152-153, 01.12.2002, p. 609-613.

研究成果: ジャーナルへの寄稿記事

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abstract = "Mixed electronic-oxide ionic conductivity and the cathodic property of BaCoO3 doped with La was investigated in this study for a solid oxide fuel cell (SOFC) operating at intermediate temperature. The electrical conductivity of BaCoO3 increases systematically with increasing amounts of La doped for Ba site. Cathodic overpotential at 1073 K decreased with increasing La content and attained a minimum at X=0.3-0.4 in Ba1-XLaXCoO3. Since the cathodic overpotential of Ba0.6La0.4CoO3 was small at decreased temperature, Ba0.6La0.4CoO3 is the optimum composition for a cathode of intermediate-temperature fuel cells among BaCoO3-based oxides. Mixed conductivity and surface activity for oxygen dissociation was investigated with 18O-16O exchange reaction. It was found that BaCoO3 doped with La exhibits a large oxide ion conductivity and surface activity. When La0.8Sr0.2Ga0.8Mg0.115Co0.05 O3 (0.4 mm in thickness) was used as electrolyte, the power density of a cell using Ba0.6La0.4CoO3 for the cathode at 873 K attained a value of 120 mW/cm2, which is slightly larger than that using a conventional Sm0.5Sr0.5CoO3 oxide for the cathode.",
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T1 - Mixed electronic-oxide ionic conductor of BaCoO3 doped with La for cathode of intermediate-temperature-operating solid oxide fuel cell

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AU - Takita, Yusaku

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N2 - Mixed electronic-oxide ionic conductivity and the cathodic property of BaCoO3 doped with La was investigated in this study for a solid oxide fuel cell (SOFC) operating at intermediate temperature. The electrical conductivity of BaCoO3 increases systematically with increasing amounts of La doped for Ba site. Cathodic overpotential at 1073 K decreased with increasing La content and attained a minimum at X=0.3-0.4 in Ba1-XLaXCoO3. Since the cathodic overpotential of Ba0.6La0.4CoO3 was small at decreased temperature, Ba0.6La0.4CoO3 is the optimum composition for a cathode of intermediate-temperature fuel cells among BaCoO3-based oxides. Mixed conductivity and surface activity for oxygen dissociation was investigated with 18O-16O exchange reaction. It was found that BaCoO3 doped with La exhibits a large oxide ion conductivity and surface activity. When La0.8Sr0.2Ga0.8Mg0.115Co0.05 O3 (0.4 mm in thickness) was used as electrolyte, the power density of a cell using Ba0.6La0.4CoO3 for the cathode at 873 K attained a value of 120 mW/cm2, which is slightly larger than that using a conventional Sm0.5Sr0.5CoO3 oxide for the cathode.

AB - Mixed electronic-oxide ionic conductivity and the cathodic property of BaCoO3 doped with La was investigated in this study for a solid oxide fuel cell (SOFC) operating at intermediate temperature. The electrical conductivity of BaCoO3 increases systematically with increasing amounts of La doped for Ba site. Cathodic overpotential at 1073 K decreased with increasing La content and attained a minimum at X=0.3-0.4 in Ba1-XLaXCoO3. Since the cathodic overpotential of Ba0.6La0.4CoO3 was small at decreased temperature, Ba0.6La0.4CoO3 is the optimum composition for a cathode of intermediate-temperature fuel cells among BaCoO3-based oxides. Mixed conductivity and surface activity for oxygen dissociation was investigated with 18O-16O exchange reaction. It was found that BaCoO3 doped with La exhibits a large oxide ion conductivity and surface activity. When La0.8Sr0.2Ga0.8Mg0.115Co0.05 O3 (0.4 mm in thickness) was used as electrolyte, the power density of a cell using Ba0.6La0.4CoO3 for the cathode at 873 K attained a value of 120 mW/cm2, which is slightly larger than that using a conventional Sm0.5Sr0.5CoO3 oxide for the cathode.

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