Defect Chemistry of Mixed Ionic/electronic P-type Oxides
Orlovskaya, Nina and Browning, Nigel
The p-type perovskite structure oxides are finding use in a number of energy related applications. In particular they are being used as cathodes in fuel cells as well as dense oxygen separation membranes. The defect concentration and defect mobility determine the electrical properties. Since both of these are dependent upon the operating temperature and oxygen activity, it is important to understand how an oxide equilibrates with its environment. In this paper, a defect chemistry model for the oxidation-reduction behavior of p-type perovskites is reviewed with formulations in the (La,Sr)(Cr,Mn,Co,Fe)03 system being used as examples.
H. U. Anderson et al., "Defect Chemistry of Mixed Ionic/electronic P-type Oxides," Mixed Ionic Electronic Conducting Perovskites for Advanced Energy Systems, Springer Verlag, Jan 2004.
The definitive version is available at http://dx.doi.org/10.1007/978-1-4020-2349-1_30
Materials Science and Engineering
Keywords and Phrases
Oxidation-Reduction; Electrical Conductivity; Oxygen Vacancies
Article - Journal
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