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Substantial interest has recently been generated by rare earth cobaltate compounds as cathode materials for solid oxide fuel cells. We have synthesised a wide range of single–phase perovskite-based rare earth cobaltates (Ln 1−x Sr x CoO 3−δ ) (Ln=La 3+ –Yb 3+ ). A combination of electron and X-ray diffraction of these phases reveals a complex family...
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