Preparation of an alkali-element-doped CeO{sub 2}-Sm{sub 2}O{sub 3} system and its operation properties as the electrolyte in planar solid oxide fuel cells

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08110.x· OSTI ID:422741

Mori, Toshiyuki; Yamamura, Hiroshi ^[1]; Saito, Syoshichi ^[2]

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1. Tosoh Corp., Tsukuba, Ibaraki (Japan). Tsukuba Research Lab.
2. Tosoh Corp., Ayase, Kanagawa (Japan). Tokyo Research Center

The ionic conductivity of the ceria-samaria (CeO{sub 2}-Sm{sub 2}O{sub 3}) system is higher than that of yttria-stabilized zirconia and other CeO{sub 2}-based oxides. In this study, a small amount of alkali-element-doped CeO{sub 2}-Sm{sub 2}O{sub 3} solid solution was prepared. This solid solution was characterized by measuring the powder density and the chemical composition. Moreover, its electrochemical properties were investigated in the temperature range from 700 to 1,000 C. It was found that a small amount of alkali-element-doped CeO{sub 2} solid solution enhanced the ionic conductivity. The power density of an oxygen-hydrogen fuel cell for alkali-element-doped CeO{sub 2}-Sm{sub 2}O{sub 3} ceramics exhibited high values at low temperatures such as 700 to 800 C. It is concluded that the improved fuel cell performance can be attributed to the high stability of this composition in the fuel atmosphere.

• Sponsoring Organization: USDOE
• OSTI ID: 422741
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 12 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
CERIUM OXIDES
CESIUM ADDITIONS
CHEMICAL COMPOSITION
DOPED MATERIALS
ELECTROLYTES
EXPERIMENTAL DATA
IONIC CONDUCTIVITY
LITHIUM ADDITIONS
PERFORMANCE
POWDERS
POWER DENSITY
SAMARIUM OXIDES
SAMPLE PREPARATION
SINTERING
SOL-GEL PROCESS
SOLID ELECTROLYTE FUEL CELLS
SOLID SOLUTIONS