About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Earth-Abundant High Entropy Oxides for Energy Applications |
| Author(s) |
Connor Enoch Westbrook, Jacob Norman, Aneeta Padhan, Arine Nikolian, Julie M. Schoenung |
| On-Site Speaker (Planned) |
Connor Enoch Westbrook |
| Abstract Scope |
Various high entropy oxide materials have demonstrated electrical properties such as high dielectric constant and ionic conductivity that are desirable for energy storage applications such as renewable energy grids and solid-state battery components. Established HEO compositions such as (CoCuMgNiZn)O rely on compositional constituents that raise supply chain, availability, and toxicity concerns. To enhance the overall sustainability footprint of HEOs, this study leverages the compositionally robust nature of these materials to investigate alternative compositions. Specifically, calcium (Ca) and iron (Fe) are introduced into the HEO. Solid-state synthesis coupled with post-consolidation heat treatment is used to control secondary-phase formation. X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and electrochemical impedance spectroscopy are used to characterize the relationships between microstructure and electrical behavior. Lattice distortion and defect formation are investigated to identify mechanisms governing the observed electrical behavior and to establish the foundation for expanded HEO design and application as energy materials. |