초록 ▼

Stable high conductivity functionally gradient compositionally layered solid bodies suitable for use as electrolytes and membranes and providing improved oxygen-ion conductivity for electrolytes and improved mixed oxygen-ion and electronic conductivity for membranes. The electrolytes provide solid o

Stable high conductivity functionally gradient compositionally layered solid bodies suitable for use as electrolytes and membranes and providing improved oxygen-ion conductivity for electrolytes and improved mixed oxygen-ion and electronic conductivity for membranes. The electrolytes provide solid oxide fuel cells with high efficiency operation at 300.degree. to 800.degree. C.

대표청구항 ▼

[ We claim:] [1.] A stable high conductivity functionally gradient compositionally layered solid state electrolyte, comprising; a dense high oxygen-ion conducting layer having essentially exclusive high oxygen-ion conduction at about 300.degree. to about 800.degree. C. and in contact on one side wit

[ We claim:] [1.] A stable high conductivity functionally gradient compositionally layered solid state electrolyte, comprising; a dense high oxygen-ion conducting layer having essentially exclusive high oxygen-ion conduction at about 300.degree. to about 800.degree. C. and in contact on one side with a mixed ionic-electronic conducting layer having mixed ionic-electronic conduction at said temperature with one face in contact with said high oxygen-ion conducting layer and its opposite face resistant to a reducing environment which renders said high oxygen-ion conducting layer unstable, said mixed ionic-electronic conducting layer having sufficient thickness to raise the oxygen partial pressure at the interface of said layers to provide high stability and high ionic conduction of said high oxygen-ion conducting layer.