| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Nanotechnology for Energy, Environment, Electronics, Healthcare and Industry
|
| Presentation Title |
Multifunctional Exfoliated 2-D Oxides for Charge Storage |
| Author(s) |
Madeleine Flint, Peter Metz, Robert Koch, Peng Gao, Alec Ladonis, Scott Misture |
| On-Site Speaker (Planned) |
Madeleine Flint |
| Abstract Scope |
δ-MnO2 2-D nanosheet assemblies have been studied in detail to define the effects of atomic-scale defects and nanostructure on charge transport, charge storage and catalytic properties. We find a direct link between charged defects and the optical, chemical, photochemical and electrochemical function. We focus our studies on 2-D nanosheets with charged defects on the metal sublattice introduced via equilibration in a controlled pH environment, resulting in nanosheet assemblies with little re-stacking along the c-axis. In-situ X-ray total scattering and spectroscopic synchrotron studies teamed with Raman spectroscopy demonstrate links between charged cation defect content and lattice response that correlate with charge storage. In-situ data also indicates δ-MnO2 nanosheet assemblies breathe laterally (by as much as 1%) during cycling, while retaining constant interlayer spacing. |