Development of SOFC cathodes for reduced-temperature applications

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:242556

Takahashi, Tohru; Ihara, Manabu; Yamada, Koichi ^[1]

---

1. Univ. of Tokyo (Japan)

It is very important to reduce the operating temperature of a solid oxide fuel cell (SOFC) for actual applications. Here, cathode materials of La{sub 1{minus}x}Sr{sub x}MN{sub 1{minus}y}Co{sub y}O{sub 3} systems having mixed conduction properties were investigated for reduced temperature operation. The thermal expansion coefficient, the chemical stability against YSZ, the electronic conductivity, the O{sup 2{minus}} ionic conductivity, and the overpotential of the materials were measured. The model for porous cathode was made to clarify the relationship between the overpotential and the ionic conductivity. This model was useful to design a cathode material itself and also its microstructure.

• OSTI ID: 242556
• 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
CATHODES
COBALT OXIDES
COMPATIBILITY
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRIC-POWERED VEHICLES
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
LANTHANUM OXIDES
MANGANESE OXIDES
MATHEMATICAL MODELS
OXYGEN
SOLID ELECTROLYTE FUEL CELLS
STRONTIUM OXIDES
SYNTHESIS
THERMAL EXPANSION
YTTRIUM OXIDES
ZIRCONIUM OXIDES