New Perovskite-Related Structure Family of Oxide-Ion Conducting Materials NdBaInO₄

Abstract

Oxide-ion conducting ceramic materials, which include\npure oxide-ion conductors and mixed oxide-ion and\nelectronic or hole conductors, have received considerable\nattention because of their potential application for oxygen\nseparation membranes, oxygen sensors, and solid oxide fuel\ncells (SOFCs) electrolytes and cathodes.1 Perovskite-type and\nperovskite-related materials have been widely investigated as\noxide-ion conductors.2 For example, the K2NiF4-type compounds\nare known to exhibit high oxide-ion conductivity.3\nBecause the oxide-ion conductivity is strongly dependent on\ncrystal structure, it is necessary to design and synthesize novel\nmaterials belonging to a new structure family for further\ninnovative developments of the oxide-ion conductors. Herein,\nwe report a new perovskite-related structure family with\nAA′BO4 composition, which exhibits oxide-ion conduction.\nHere, A and A′ are relatively larger cations and B is a smaller cation. In this work we have succeeded in solving the crystal structure of NdBaInO4 and show oxide-ion conduction in NdBaInO4. © 2014, American Chemical Society.