| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Effects of Processing Conditions on Hybrid Organic-Inorganic Solid Electrolytes |
| Author(s) |
Vazrik Keshishian, John Kieffer |
| On-Site Speaker (Planned) |
Vazrik Keshishian |
| Abstract Scope |
Achieving high ionic conductivity and mechanical stiffness in solid state electrolytes (SSE) simultaneously, requires a composite materials design approach. We develop hybrid organic-inorganic electrolytes, in which a silica backbone, formed via sol-gel synthesis provides a mechanically rigid backbone. The pore fluid is subsequently replaced with PEO polymer. In this approach mechanical and ionic transport properties are decoupled, resulting in both high elastic stiffness and ionic conductivity. The network structure of a gel-cast material can be further conditioned by influencing the structural evolution during drying. Changing sample aspect ratio various degrees of anisotropy and spatial gradients can be achieved in the network topology, as revealed through nano-mechanical characterization using Brillouin light scattering. Given the strong correlation between adiabatic modulus and ion hopping activation energy , this anisotropy also affects ionic conductivity. We elaborate on strategies to harness this structural conditioning to create better performing SSE (Acknowledgement: NSF-DMR 1610742.) |