About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Nuclear probes for investigation of energy storage materials |
| Author(s) |
Hillary Smith, Eric Novak |
| On-Site Speaker (Planned) |
Hillary Smith |
| Abstract Scope |
Characterization of energy storage materials requires probes of the functionality, structure, and microstructure of the material to understand how microscopic structural properties influence macroscopic performance. Nuclear probes provide a powerful complement to traditional characterization tools by providing information about the atomic nucleus and its interaction with its environment. This talk will describe our investigations of Na-ion and Li-ion battery cathode materials using quasielastic neutron scattering (QENS) and Mossbauer spectroscopy. QENS is employed to study the dynamical relaxation process in battery cathode materials. We present temperature-dependent QENS results on sodium-ion diffusion in olivine NaFePO4. Mossbauer spectroscopy, a probe of hyperfine interactions, is employed to study the phase, oxidation state, and coordination environment of battery cathode materials. We will share our investigations of polaron mobility in Li and Na-ion cathode materials measured with ex situ Mossbauer spectroscopy, as well as results from in situ Mossbauer studies during electrochemical cycling of battery half-cells. |