| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Correlating Grain Boundary Character With Ionic Conductivity via EIS and 3D Diffraction Tomography |
| Author(s) |
Christopher Nyborg, Oliver Johnson |
| On-Site Speaker (Planned) |
Christopher Nyborg |
| Abstract Scope |
Grain Boundaries (GBs) have a strong and generally deleterious effect on the ionic conductivity of solid-oxide fuel cell (SOFC) electrolytes. However, the effect depends on the types of GBs present in the electrolyte. While GB ionic conductivity can vary by orders of magnitude, much remains unknown about the detailed relationship between the crystallographic character of a GB and its ionic conductivity. In this study, we employed microcontact Electrochemical Impedance Spectroscopy (EIS) and 3D Diffraction Contrast Tomography (DCT) to characterize and correlate the ionic conductivity of GBs with their full 5D crystallographic character. The resulting structure-property correlations will help in the design of novel SOFC electrolyte microstructures to eliminate the most deleterious GBs and lower SOFC operating temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Characterization, Energy Conversion and Storage |