About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Understanding Improved Alkali Metal Plating of Sodium Compared to Lithium via 2DIR characterization and MD Simulation of Weaker Solvation Behavior for High Energy Battery Systems |
Author(s) |
Rachel E. Carter, Cynthia Pyles, Michael Swift, Matthew Lefler, Susmita Sarkar, Adam Dunkelberger, Partha Mukherjee |
On-Site Speaker (Planned) |
Rachel E. Carter |
Abstract Scope |
Next generation battery systems replace intercalation anodes, which store alkali ions, with the pure alkali metals. This configuration requires the alkali ions to plate and strip with high coulombic efficiency and smooth morphology. Lithium is the highest energy density alkali metal. However, sodium has much higher global abundance, making it an attractive second choice. We use in situ optical microscopy to compare Na and Li plating and stripping in 1 M MeTFSi (Me: Li or Na) FEC. We observe more desirable morphology for Na. Novel 2DIR measurements indicate weaker interaction between the FEC carbonyl and the Na+ compared to the Li+ and distinct ultrafast molecular dynamics between the two systems. MD Simulations of bond length and coordination number corroborate these observations. The inherently weaker binding of Na+ ions with the electrolyte solvent provides higher columbic efficiency plating and stripping via more desirable morphologies. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Computational Materials Science & Engineering, Characterization |