Application of the new oxide ionic conductor, LaGaO{sub 3}, to the solid electrolyte of fuel cells

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:242488

Ishihara, Tatsumi; Minami, Hiroaki; Matsuda, Hideaki; Takita, Yusaku ^[1]

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1. Oita Univ. (Japan)

It was found that the perovskite type oxide La{sub 1{minus}x}Sr{sub x}Ga{sub 0.8}Mg{sub 0.2}O{sub 3}, exhibits the high oxide ion conductivity over a wide oxygen partial pressure and temperature range. The electrical power generation characteristics of SOFCs where LaGaO{sub 3}-based perovskite type oxide was applied as the electrolyte, were studied. It became evident that the composition of La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3} was the most suitable for the electrolyte of the SOFC, among the LaGaO{sub 3}-based perovskite oxides, and furthermore, Ni, and La{sub 0.9}Sr{sub 0.1}CoO{sub 3} were suitable as the anode and cathode, respectively. The maximum power density of the SOFC, which consisted of these materials, attained a value as high as 0.93 W/cm{sup 2} at 1,273 K, though the thickness of electrolyte was as large as 0.5mm. Moreover, the power density of cells was still attained at a value as high as 0.17 W/cm{sup 2} at 973 K.

• OSTI ID: 242488
• Report Number(s): CONF-950683--; ISBN 1-56677-095-5
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
EXPERIMENTAL DATA
GALLIUM OXIDES
IONIC CONDUCTIVITY
LANTHANUM OXIDES
MAGNESIUM OXIDES
MATERIALS TESTING
PERFORMANCE
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
STRONTIUM OXIDES