|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High-Temperature Systems for Energy Conversion and Storage
||Strain Assisted Fast Ionic Conduction in Ion Irradiation Induced Nanofibers in Pyrochlore Structure Complex Oxide Matrix
||Ritesh Sachan, D. Aidhy, Yanwen Zhang, Matthew F. Chisholm, William J. Weber
|On-Site Speaker (Planned)
Besides interesting features such as frustrated magnetism, ferroelectricity, photocatalysis, photoluminescence, and giant magnetoresistance, materials with the A2B2O7 pyrochlore structure have attracted significant interest as fast-ion conductors for electrolytes in solid oxide fuel cells. In the present study, we show that ionic conductivity is increased by many folds (~5 times) by creating disordered phases in Gd2Ti2O7 if the phases are stabilized under tensile strain. Such disordered phases are formed in a nanofiber shape by high energy ion irradiation. Microstructure observations reveal that nanofibers consist of amorphous phase surrounded by a tensile strained disordered crystalline phase. The theoretical calculations show that the ionic conductivity can be tuned as a function of increasing strain. Based on the results, we establish that strain controlled phase stability and enhanced ion conductivity would open up new avenues for materials design for solid oxide fuel cells applications.
||Planned: A print-only volume