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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium High-Temperature Systems for Energy Conversion and Storage
Presentation Title Strain Assisted Fast Ionic Conduction in Ion Irradiation Induced Nanofibers in Pyrochlore Structure Complex Oxide Matrix
Author(s) Ritesh Sachan, D. Aidhy, Yanwen Zhang, Matthew F. Chisholm, William J. Weber
On-Site Speaker (Planned) Ritesh Sachan
Abstract Scope 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.
Proceedings Inclusion? Planned: A print-only volume

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An Improvement of SOFC Durability by the Mass Transport Analysis at the Interfaces
Carbon Deposition Behavior on Chromium Oxides Heated Directly in Low S/C Environments
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Chromium Poisoning in High Temperature (600-1000C) Electrochemical Systems
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Combinatorial Development of Metal Hydrides for Thermal Coupling of Solid Oxide Fuel Cells
Composition and Temperature Dependence of Fracture Behavior of Diffusion Aluminide Bond Coats
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Effect of Additives on Densification and Thermal Conductivity of Barium Zinc Tantalate Ceramics
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Electro-spraying and Combustion of Ethanol in a Micro-scale Combustor under Combined Electric Field
Evaluation of Delamination Life for Thermal Barrier Coating with Various Bond Coats
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High Performance Molybdenum Dioxide (MoO2)-Based Anode for Gasolin-Fueled SOFCs
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High Temperature Resonant Ultrasound Spectroscopy Methodologies Applied to Relaxor Ferroelectrics
In-Operando XRD Tests of LSCF and LSM/YSZ SOFC Cathodes
L-1: Graphene-inorganic Hybrids with Cobalt Oxides for Electrochemical Energy Storage and Conversion Applications
L-2: Thermal and Mechanical Properties of (La1-xBix)2Mo2O9
L-3: Effect of Heating Rate on the Sintering and Performance of MnCo2O4 Contact Layer with Metallic Powder Precursors
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Molecular View of High Temperature Oxygen Reduction & Evolution Reactions
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Scalable and Hierarchical Nanostructure Ensembles for High Temperature Energy and Environmental Applications
Solid Acid Electrolytes Applied to Electricity Generation and Gas Separation
Solid Composite Electrolytes for Lithium-ion Batteries with Enhanced Safety and Cycle Performance at High Temperature
Solid Oxide Fuel Cell - Energy Storage Hybrid Devices
Spark Plasma Sintering of Ceramic Composites for Solid Oxide Fuel Cell and Hydrogen Separation Applications
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Synchrotron-Based X-ray Imaging of Energy Conversion and Storage Materials
Synthesis and Characterization of Mixed-Cation Rare-Earth Orthophosphates
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Two-Dimensional Transition Metal Carbides and Carbonitrides Derived from MAX Phases for Electrochemical Energy Storage Systems
Ultraviolet Digital Image Correlation (UV-DIC) for Measuring Full-Field Strains at Extreme Temperatures
Understanding the Mechanisms of Electrode Degradation in Solid Oxide Fuel Cells by Phase-field Modeling

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