Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 and its application for solid oxide fuel cells

Tatsumi Ishihara; Masaki Ando; Makiko Enoki; Yusaku Takita

doi:10.1016/j.jallcom.2004.12.086

Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O₃ and its application for solid oxide fuel cells

Tatsumi Ishihara, Masaki Ando, Makiko Enoki, Yusaku Takita

Research output: Contribution to journal › Conference article › peer-review

18 Citations (Scopus)

Abstract

Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O₃ was investigated in this study and it was found that the oxide ion conductivity increased significantly by doping Fe into Ga site. Although the electrical conductivity monotonically increased with increasing amount of Fe, partial electronic conduction became significant. On the other hand, doping Mg for Ga site simultaneously with Fe is useful for keeping high transport number. By doping Fe for Ga site, perovskite oxide with cubic structure seems to be stabilized and the solid solution limit for Sr for La site is expanded. Considering the transport number of oxide ion and the electronic conductivity, the optimum composition for oxide ion conductivity in this system is La_0.7Sr _0.3Ga_0.7Fe_0.2Mg_0.1O₃ _- _δ (LSGFM73721). By using this oxide for electrolyte, large power density of 200 mW/cm² can be achieved at 873 K.

Original language	English
Pages (from-to)	507-511
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	408-412
DOIs	https://doi.org/10.1016/j.jallcom.2004.12.086
Publication status	Published - Feb 9 2006
Event	Proceedings of the Rare Earths'04 in Nara, Japan - Duration: Nov 7 2004 → Nov 12 2004

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2004.12.086

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title = "Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 and its application for solid oxide fuel cells",

abstract = "Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 was investigated in this study and it was found that the oxide ion conductivity increased significantly by doping Fe into Ga site. Although the electrical conductivity monotonically increased with increasing amount of Fe, partial electronic conduction became significant. On the other hand, doping Mg for Ga site simultaneously with Fe is useful for keeping high transport number. By doping Fe for Ga site, perovskite oxide with cubic structure seems to be stabilized and the solid solution limit for Sr for La site is expanded. Considering the transport number of oxide ion and the electronic conductivity, the optimum composition for oxide ion conductivity in this system is La0.7Sr 0.3Ga0.7Fe0.2Mg0.1O3 - δ (LSGFM73721). By using this oxide for electrolyte, large power density of 200 mW/cm2 can be achieved at 873 K.",

author = "Tatsumi Ishihara and Masaki Ando and Makiko Enoki and Yusaku Takita",

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pages = "507--511",

journal = "Journal of Alloys and Compounds",

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note = "Proceedings of the Rare Earths'04 in Nara, Japan ; Conference date: 07-11-2004 Through 12-11-2004",

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TY - JOUR

T1 - Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 and its application for solid oxide fuel cells

AU - Ishihara, Tatsumi

AU - Ando, Masaki

AU - Enoki, Makiko

AU - Takita, Yusaku

PY - 2006/2/9

Y1 - 2006/2/9

N2 - Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 was investigated in this study and it was found that the oxide ion conductivity increased significantly by doping Fe into Ga site. Although the electrical conductivity monotonically increased with increasing amount of Fe, partial electronic conduction became significant. On the other hand, doping Mg for Ga site simultaneously with Fe is useful for keeping high transport number. By doping Fe for Ga site, perovskite oxide with cubic structure seems to be stabilized and the solid solution limit for Sr for La site is expanded. Considering the transport number of oxide ion and the electronic conductivity, the optimum composition for oxide ion conductivity in this system is La0.7Sr 0.3Ga0.7Fe0.2Mg0.1O3 - δ (LSGFM73721). By using this oxide for electrolyte, large power density of 200 mW/cm2 can be achieved at 873 K.

AB - Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 was investigated in this study and it was found that the oxide ion conductivity increased significantly by doping Fe into Ga site. Although the electrical conductivity monotonically increased with increasing amount of Fe, partial electronic conduction became significant. On the other hand, doping Mg for Ga site simultaneously with Fe is useful for keeping high transport number. By doping Fe for Ga site, perovskite oxide with cubic structure seems to be stabilized and the solid solution limit for Sr for La site is expanded. Considering the transport number of oxide ion and the electronic conductivity, the optimum composition for oxide ion conductivity in this system is La0.7Sr 0.3Ga0.7Fe0.2Mg0.1O3 - δ (LSGFM73721). By using this oxide for electrolyte, large power density of 200 mW/cm2 can be achieved at 873 K.

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DO - 10.1016/j.jallcom.2004.12.086

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VL - 408-412

SP - 507

EP - 511

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

T2 - Proceedings of the Rare Earths'04 in Nara, Japan

Y2 - 7 November 2004 through 12 November 2004

ER -

Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O₃ and its application for solid oxide fuel cells

Abstract

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