Tailoring electrical properties of double perovskites as material components for SOFCs.
Perovskites derived from La2-x-yCexSry(VAC)zMTiO6-d (M=Co, Ni; VAC=vacancies) by doping with Sr and Ce, (0<=y<=0.3, 0.1<=x<=0.2, 0<=z<=0.2), prepared in air are promising materials for electrodes or electrolytes in SOFCs due to their high electrical conductivity. The actual conductivity values and charge-carriers are different: significant n-type, p-type conductivity (or both) depending on the ambient conditions (dry air or dry H2/Ar). Different explanations for these results arise, related to the presence of oxygen vacancies in the material and therefore, possible ionic conductivity. Neutron diffraction will help us to determine which is the operating mechanism working for a given composition.
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AMADOR Ulises; AZCONDO Maria Teresa; GOMEZ PEREZ Alejandro; PEREZ FLORES Juan Carlos and RITTER Clemens. (2013). Tailoring electrical properties of double perovskites as material components for SOFCs.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-22-720
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