NICKEL-BASED LAYERED PEROVSKITE CATHODE MATERIALS FOR APPLICATION IN INTERMEDIATE-TEMPERATURE SOLID OXIDE FUEL CELLS

作者：Han Juan^*; Zheng Kun; Swierczek Konrad

来源：Functional Materials Letters, 2011, 4(2): 151-155.

DOI：10.1142/S1793604711001853

• Ruddlesden-Popper layered perovskites
• structural studies
• oxygen nonstoichiometry
• transport properties
• IT-SOFC

In this work we present results of structural (XRD) and microstructural (SEM) characterization, as well as determination of transport properties (electrical conductivity, Seebeck coefficient) and oxygen nonstoichiometry as a function of temperature for La2NiO4+delta, Nd2NiO4+delta and Pr2NiO4+delta layered perovskites, promising cathode materials for application in intermediate-temperature solid oxide fuel cells (IT-SOFCs). In addition to characterization of physico-chemical properties, the obtained materials were used as cathodes in custom made, electrolyte-supported IT-SOFCs. Electrochemical performance and impedance spectroscopy (EIS) measurements were performed on the cells in 600-850 degrees C temperature range. The obtained maximum power densities, exceeded 0.2 W.cm(-2) at 800 degrees C.

• 出版日期2011-6