Doped PrMn03Perovskite Oxide as a New Cathode of Solid Oxide Fuel Cells for Low Temperature Operation

Tatsumi Ishihara, Takanari Kudc, Hideaki Matsudc, Yusaku Takita

Research output: Contribution to journalArticle

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Abstract

Cathodic overpotentials of Ln0.6Sr0.4Mn03(Ln = La, Pr, Nd, Sm, Gd, Yb, and Y) were studied for a new cathode of solid oxide fuel cell (SOFC). Cathodic overpotentials as well as the electrical conductivity strongly depended on the rare earth cations used for the A sites of perovskite oxide. Strontium doped PrMnO3exhibited the highest electrical conductivity among the examined perovskite oxide containing Mn for B sites. Moreover, overpotentials of Sr-doped PrMnO3cathode maintained low values in spite of decreasing the operating temperature. Consequently, almost the same power density of SOFC with La0.6Sr0.4Mn03cathode can be obtained at about 100 K lower operating temperature by using Sr-doped PrMnO3as the cathode. The overpotentials and electrical conductivity decreased and increased with increasing the amount of Sr dopant in PrMnO3, respectively, and the lowest overpotential was attained at x = 0.4 in Pr1-xSrxMnO3. Comparing with La0.6Sr0.4MnO3oxide, the reactivity of Pr0.6Sr0.4MnO3with Y2O3-stabilized ZrO2is much less than that of La0.6Sr0.4MnO3 and furthermore, the matching of thermal expansion of Pr0.6Sr0.4MnO3with Y2O3-ZrO2was satisfactorily high. Therefore, perovskite oxide of Pr0.6Sr0.4MnO3has a great possibility of the cathode materials for decreasing the operating temperature of solid oxide fuel cells.

Original languageEnglish
Pages (from-to)1519-1524
Number of pages6
JournalJournal of the Electrochemical Society
Volume142
Issue number5
DOIs
Publication statusPublished - Jan 1 1995

Fingerprint

Low temperature operations
Solid oxide fuel cells (SOFC)
Perovskite
Oxides
Cathodes
Strontium
Temperature
Rare earths
Thermal expansion
Cations
Positive ions
Doping (additives)
Electric Conductivity
perovskite

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Doped PrMn03Perovskite Oxide as a New Cathode of Solid Oxide Fuel Cells for Low Temperature Operation. / Ishihara, Tatsumi; Kudc, Takanari; Matsudc, Hideaki; Takita, Yusaku.

In: Journal of the Electrochemical Society, Vol. 142, No. 5, 01.01.1995, p. 1519-1524.

Research output: Contribution to journalArticle

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abstract = "Cathodic overpotentials of Ln0.6Sr0.4Mn03(Ln = La, Pr, Nd, Sm, Gd, Yb, and Y) were studied for a new cathode of solid oxide fuel cell (SOFC). Cathodic overpotentials as well as the electrical conductivity strongly depended on the rare earth cations used for the A sites of perovskite oxide. Strontium doped PrMnO3exhibited the highest electrical conductivity among the examined perovskite oxide containing Mn for B sites. Moreover, overpotentials of Sr-doped PrMnO3cathode maintained low values in spite of decreasing the operating temperature. Consequently, almost the same power density of SOFC with La0.6Sr0.4Mn03cathode can be obtained at about 100 K lower operating temperature by using Sr-doped PrMnO3as the cathode. The overpotentials and electrical conductivity decreased and increased with increasing the amount of Sr dopant in PrMnO3, respectively, and the lowest overpotential was attained at x = 0.4 in Pr1-xSrxMnO3. Comparing with La0.6Sr0.4MnO3oxide, the reactivity of Pr0.6Sr0.4MnO3with Y2O3-stabilized ZrO2is much less than that of La0.6Sr0.4MnO3 and furthermore, the matching of thermal expansion of Pr0.6Sr0.4MnO3with Y2O3-ZrO2was satisfactorily high. Therefore, perovskite oxide of Pr0.6Sr0.4MnO3has a great possibility of the cathode materials for decreasing the operating temperature of solid oxide fuel cells.",
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AU - Takita, Yusaku

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N2 - Cathodic overpotentials of Ln0.6Sr0.4Mn03(Ln = La, Pr, Nd, Sm, Gd, Yb, and Y) were studied for a new cathode of solid oxide fuel cell (SOFC). Cathodic overpotentials as well as the electrical conductivity strongly depended on the rare earth cations used for the A sites of perovskite oxide. Strontium doped PrMnO3exhibited the highest electrical conductivity among the examined perovskite oxide containing Mn for B sites. Moreover, overpotentials of Sr-doped PrMnO3cathode maintained low values in spite of decreasing the operating temperature. Consequently, almost the same power density of SOFC with La0.6Sr0.4Mn03cathode can be obtained at about 100 K lower operating temperature by using Sr-doped PrMnO3as the cathode. The overpotentials and electrical conductivity decreased and increased with increasing the amount of Sr dopant in PrMnO3, respectively, and the lowest overpotential was attained at x = 0.4 in Pr1-xSrxMnO3. Comparing with La0.6Sr0.4MnO3oxide, the reactivity of Pr0.6Sr0.4MnO3with Y2O3-stabilized ZrO2is much less than that of La0.6Sr0.4MnO3 and furthermore, the matching of thermal expansion of Pr0.6Sr0.4MnO3with Y2O3-ZrO2was satisfactorily high. Therefore, perovskite oxide of Pr0.6Sr0.4MnO3has a great possibility of the cathode materials for decreasing the operating temperature of solid oxide fuel cells.

AB - Cathodic overpotentials of Ln0.6Sr0.4Mn03(Ln = La, Pr, Nd, Sm, Gd, Yb, and Y) were studied for a new cathode of solid oxide fuel cell (SOFC). Cathodic overpotentials as well as the electrical conductivity strongly depended on the rare earth cations used for the A sites of perovskite oxide. Strontium doped PrMnO3exhibited the highest electrical conductivity among the examined perovskite oxide containing Mn for B sites. Moreover, overpotentials of Sr-doped PrMnO3cathode maintained low values in spite of decreasing the operating temperature. Consequently, almost the same power density of SOFC with La0.6Sr0.4Mn03cathode can be obtained at about 100 K lower operating temperature by using Sr-doped PrMnO3as the cathode. The overpotentials and electrical conductivity decreased and increased with increasing the amount of Sr dopant in PrMnO3, respectively, and the lowest overpotential was attained at x = 0.4 in Pr1-xSrxMnO3. Comparing with La0.6Sr0.4MnO3oxide, the reactivity of Pr0.6Sr0.4MnO3with Y2O3-stabilized ZrO2is much less than that of La0.6Sr0.4MnO3 and furthermore, the matching of thermal expansion of Pr0.6Sr0.4MnO3with Y2O3-ZrO2was satisfactorily high. Therefore, perovskite oxide of Pr0.6Sr0.4MnO3has a great possibility of the cathode materials for decreasing the operating temperature of solid oxide fuel cells.

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