SOLID OXIDE, SOLID OXIDE ELECTRODE, SOLID OXIDE FUEL CELL INCLUDING THE SAME, AND METHODS OF PREPARING THE SAME

摘要

An oxide represented by Formula 1: A2M1-xCxD2O7+deltaFormula 1 wherein, in Formula 1, x is in the range of 0.4@x@1.0; delta is selected such that the oxide electrically neutral; A is at least one metal selected from an alkaline earth metal; M is an alkaline earth metal that differs from A; C is a transition metal; and D is at least one selected from germanium (Ge) and silicon (Si).