Y and Nb-doped SrTiO 3 as a mixed conducting anode for...

Details Y and Nb-doped SrTiO 3 as a mixed conducting anode for... Y and Nb-doped SrTiO 3 as a mixed conducting anode for...

2004-06-25

2009-10-20

Ruthkosky, Mark (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C423S155000

Reexamination Certificate

active

07604892

ABSTRACT:
The invention disclosed relates to novel materials of the general formulain-line-formulae description="In-line Formulae" end="lead"?(Sr1-1.5xM1x)1-y/2Ti1-yM2yO3  [I]in-line-formulae description="In-line Formulae" end="tail"?wherein M1is a first trivalent dopant metal atom replacing some of the strontium atoms on a strontium sub-lattice, x is a mole percent of said dopant atoms M1on the strontium sublattice and 0<x≦0.04, and M2is a second pentavalent dopant metal atom replacing some titanium atoms on a titanium sublattice, y is a mole percent of said dopant atoms M2on the titanium sublattice and 0<y≦0.2. Also disclosed is a novel reduced form of the compounds of formula I, ie. compounds of formula (Sr1-1.5xM1x)1-y/2Ti1-yM2yO3-δII. The variability in oxygen content between the oxidized and reduced forms of these compounds corresponds to 0<δ≦0.7. These novel compounds maintained a stable single phase at both high and low oxygen partial pressures. Also disclosed is a solid oxide fuel cell including an anode made of the novel compounds of formula I.

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