EPMA on interfaces between cathode and electrolyte of the solid oxide fuel cell
- Research Centre Juelich (Germany). Inst. for Materials in Energy Systems
The interface of La{sub y{minus}x}Sr{sub x}MnO{sub 3}/YSZ was studied with EPMA after annealing at 1200 C to 1400 C for various times. Typical reaction products (Zirconates) and a diffusion zone of Mn and La in the YSZ were determined using quantitative microanalysis. The chemical reactivity at the interface is dependent on the stoichiometry (y) and the Sr content (x) of the perovskite. An increased Sr content leads to a decreased formation of La{sub 2}Zr{sub 2}O{sub 7} but also to an increased diffusion of Mn oxide into the electrolyte material. A high Sr content (x=0.4) reveals both aspects: the formation of a La- and Mn-enriched SrZrO{sub 3} layer at the reaction interface, as well as a diffusion of Mn oxide into YSZ.
- OSTI ID:
- 242555
- Report Number(s):
- CONF-950683--; ISBN 1-56677-095-5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTIVATION ENERGY
CATHODES
ELECTRON MICROPROBE ANALYSIS
EXPERIMENTAL DATA
HEAT TREATMENTS
INTERFACES
LANTHANUM OXIDES
MANGANESE OXIDES
MASS TRANSFER
METALLURGICAL EFFECTS
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
SOLUBILITY
STRONTIUM
STRONTIUM OXIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES