Published December 2007 | Version v1
Journal article Metadata-only

Ionic conductivity investigation in samarium and strontium co-doped ceria system

Creators

  • 1. Advanced Ceramics Laboratory, Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan-10672 (China)

Description

Effects of strontium doping on ionic conductivity of Sm2O3-doped ceria (samarium-doped ceria (SDC)) were investigated. The distribution and average radius of oxygen vacancies by co-doping divalent and trivalent cations were calculated from a hard-sphere model. Experimental results exhibit that the best conductivity for Ce0.78Sm0.2Sr0.02O1.88 (0.061 S cm-1) specimen is twice that of Ce0.8Sm0.2O1.9 (0.0371 S cm-1) at 8000C. A decrease of 500C in the working temperature of SDC was developed by modifying the dopant concentration, average binding energy and ionic radius of the dopant. The results confirm the Sm3+ and Sr2+ co-doped ceria material as a potential electrolyte for intermediate-temperature solid oxide fuel cell applications

Additional details

Identifiers

DOI
10.1088/0031-8949/2007/T129/067;
PII
S0031-8949(07)60526-67;

Publishing Information

Journal Title
Physica Scripta (Online)
Journal Volume
2007
Journal Issue
T129
Journal Page Range
p. 303-307
ISSN
1402-4896

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39028688
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BINDING ENERGY; CATIONS; CERIUM OXIDES; DOPED MATERIALS; ELECTROLYTES; HARD-SPHERE MODEL; IONIC CONDUCTIVITY; OXYGEN; SAMARIUM; SAMARIUM IONS; SAMARIUM OXIDES; SOLID OXIDE FUEL CELLS; STRONTIUM; STRONTIUM IONS; STRONTIUM OXIDES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 1000-4000 K; VACANCIES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALKALINE EARTH METALS; CERIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIRECT ENERGY CONVERTERS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTROCHEMICAL CELLS; ELEMENTS; ENERGY; FUEL CELLS; HIGH-TEMPERATURE FUEL CELLS; IONS; MATERIALS; METALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; RARE EARTH COMPOUNDS; RARE EARTHS; SAMARIUM COMPOUNDS; SOLID ELECTROLYTE FUEL CELLS; STRONTIUM COMPOUNDS; TEMPERATURE RANGE