Faculty of Engineering and Natural Sciences
Interface Stability in Solid Oxide Fuel Cells for Intermediate Temperature Applications
Istanbul Technical Universitiy
Department of Metallurgical and Materials Engineering,
Strontium and magnesium doped lanthanum gallate (LSGM) perovskite-type compounds are considered as very promising solid electrolytes for intermediate temperature fuel cell (IT-SOFC) applications. The cermet-type anode and nickelate-type cathode materials are used as electrodes while their chemical compatibility with LSGM is not well known. For the practical use of these materials not only the thermodynamic stability of the electrolyte and electrodes themselves, but also the reactivity between the electrolyte and electrodes are needed. In this study, thermodynamic modeling of La-Ga-Ni-O system, which plays a crucial role for the understanding of interface reactions between LSGM electrolytes and nickalate cathodes has been done. Using calculated phase diagrams the compatibility of nickelates as cathode material and also of Nibased cermets as anode material with LSGM electrolyte will be discussed.
March 18, 2009, 13:40,