| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Charge Storage Mechanisms in Layered Oxide Supercapacitors |
| Author(s) |
Scott Misture |
| On-Site Speaker (Planned) |
Scott Misture |
| Abstract Scope |
Layered and exfoliated oxides have attractive properties for a wide range of applications from catalysis to charge storage. Layered MnO2 and related layered perovskites are known high-capacity supercapacitors, and 2-D MnO2 nanosheets demonstrate an interesting response to reduction of Mn4+ to Mn3+, where Jahn-Teller distorted Mn3+ is displaced out of the plane of the nanosheet forming a “surface Frenkel” defect. The talk will discuss MnO2 and perovskites containing transition metal oxides with intentional point defects. The talk centers on the application of advanced materials characterization tools for study of complex nanoscale 2-D oxides. In-situ and in-operando studies using high energy X-ray diffraction, X-ray pair distribution functions, EXAFS/XANES and Raman spectroscopy will be discussed. We show that linking electrochemical measurements to local structure characterization results enables us to understand the mechanisms by which charging occurs in supercapacitor electrodes. |