Abstract
Recently, Solid Oxide Fuel Cell (SOFC) with high efficiency is promising for improving energy problems. However, the prevalence of using SOFC has important technical issues. One of the most important issue is to make the operating temperature lower under 600 ℃. It is indispensable for solving this issue to understand the conduction mechanism of SOFC materials. However, it has not been sufficient for discussing it to estimate materials properties yet. Especially, there are few reports on the study of the conduction mechanism for SOFC materials by estimating detailed crystal and local structure. In this study, the conduction mechanism in cathode of perovskite materials, as bottleneck for operating at low temperature, is discussed by the results of Rietveld refinements and Maximum Entropy Method, using diffraction data of synchrotron X-ray and neutron, X-ray absorption spectra of in situ measurements and first principle calculations.
