|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Materials for Energy Conversion and Storage
||Understanding the Disordered Structure in Energetic Ion Radiation Induced Fast Ion Conducting Nanofibers
||Ritesh Sachan, 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 in disordered phases of Gd2Ti2O7 is increased by 2 orders. 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 disordered phase formation under tensile strain is the necessary condition to have higher ion conductivity and it dramatically increases 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 fast ion conducting applications.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)