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Meeting MS&T25: Materials Science & Technology
Symposium Energy Materials for Sustainable Development
Presentation Title Ionic Transport Properties of Acceptor Doped Layered Hexagonal Perovskites
Author(s) Joshua Willoughby, Kyle Brinkman
On-Site Speaker (Planned) Joshua Willoughby
Abstract Scope Layered perovskite based materials have been an expanding area of research due to their unique crystal structures and intrinsic oxygen defects. These defects enable water uptake and proton conduction without the use of acceptor doping, as is seen in traditional proton conductors. To further improve proton transport and conductivity for protonic ceramic fuel cells, acceptor doping can be used to increase the concentration of protonic defects. In this work, the layered hexagonal perovskites of the series Ba5Er2+xAl2Zr1-xO13-1/2x (x=0, 0.1, 0.2) were synthesized via a solvent-free urea method. The samples were studied using electrochemical impedance spectroscopy and electromotive force tests to estimate the ionic conductivity and transport numbers in oxidizing conditions. This work examines the relative electron and ionic transport properties of these acceptor doped systems.

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