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Meeting Materials Science & Technology 2020
Symposium Functional Defects in Electroceramic Materials
Presentation Title Designing Optimal Defect Environments for High Ionic Conductivity and Surface Catalytic Reactions
Author(s) Lane W. Martin
On-Site Speaker (Planned) Lane W. Martin
Abstract Scope Solid-oxide fuel/electrolyzer cells have stringent materials requirements related to defects – from electrolyte materials with low ohmic losses for oxygen vacancy migration to electrode materials with high oxygen-exchange rates. There is incomplete understanding, however, of the structure-property relationships that would enable the rational design of better materials. Here, using epitaxial thin-film growth, synchrotron radiation, impedance spectroscopy, and density-functional theory, the impact of manipulating the structure of model electrolyte (e.g., La<sub>0.9</sub>Sr<sub>0.1</sub>Ga<sub>0.95</sub>Mg<sub>0.05</sub>O<sub>3–δ</sub>) and electrode (e.g., La<sub>1-x</sub>Sr<sub>x</sub>Co<sub>1-y</sub>Fe<sub>y</sub>O<sub>3</sub>) materials on the evolution of defect-mediate ionic conductivity and surface oxygen-exchange reactions are studied. We will leverage thin-film strain and orientation to show how unit-cell volume and octahedral rotations can be tuned independently to produce high ionic conductivity and how in half-cell systems different orientations of electrodes [e.g., (100), (110), and (111)] provide completely different potentials for catalytic response, thus answering existing questions in the field.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Co-doping Strategies for Controlling Electrical Conductivity of BaTiO3 Ceramics
Defects Engineering in Epitaxial Complex Oxides for Designed Functionality
Design of Functional Decompositions for Solid State Batteries
Designing Optimal Defect Environments for High Ionic Conductivity and Surface Catalytic Reactions
Energetic Compromise for Achieving “Redox-Site-Rich” in Pseudocapacitive Energy Storage Materials: A Case Study of Nickel – aluminum Layered Double Hydroxides
Energetic Landscape of Functionally Modified 2D Nano-ceramics for Energy Storage
Formation of Two-dimensional Heterointerface in Layered Oxides for Improved Electrode Performance
Functional Defects by Design in Energy and Quantum Materials
Structure and Energetics of Point Defects in Titanium Dioxide
Thermodynamic Insights into Engineering 2D Nano-ceramics Towards Powering Portable Electronic Devices

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