Oxygen transport properties of dense and porous (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ
作者： Per Hjalmarsson , Martin Søgaard , Mogens Mogensen
DOI: 10.1016/J.SSI.2009.07.012
关键词: Nickel 、 Dielectric spectroscopy 、 Porosity 、 Ac impedance 、 Electrical resistivity and conductivity 、 Inorganic chemistry 、 Oxygen transport 、 Relaxation (NMR) 、 Materials science 、 Perovskite (structure)
摘要: Abstract We have determined kex and Dchem for (La0.8Sr0.2)0.99Co0.8Ni0.2O3-δ by the use of electrical conductivity relaxation on a dense sample applying ALS model to measured AC impedance spectrum porous electrode. Extracting from methods resulted in comparable values. also agreed well with literature values La0.8Sr0.2CoO3-δ, indicating that nickel substitution does not change oxygen transport properties. was further found decrease five times higher rate than when using an Electrochemical Impedance Spectroscopy (EIS) over several days.
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