About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Probing the Role of SEI Heterogeneity on Sodium Plating and Stripping |
Author(s) |
Susmita Sarkar, Partha Mukherjee |
On-Site Speaker (Planned) |
Susmita Sarkar |
Abstract Scope |
The intrinsic instability of sodium (Na) metal anode in the presence of liquid electrolyte leads to the formation of solid electrolyte interphase (SEI) layer. An ideal SEI layer should prevent further electrolyte decomposition while restraining surface roughening and dendrite growth. However, heterogenous plating/stripping during the charging/discharging of the Na metal leads to dendritic growth and cell failure. In this work, we found the mutual influences of heterogeneous SEI formation on vigorous Na growth and accumulated Na stripping. Fluoroethylene carbonate (FEC) is a well-recognized additive for the formation of a stable SEI layer in Lithium-ion electrolyte. Here, we examined the role of FEC in the quality of the sprouted SEI layer and its influence on preferential plating/stripping of the Na metal. The different stages of surface impedance evolution, overpotential development, and surface morphologies growth/dissolution will be explored here to understand the reversibility of Na in different electrolytes. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, |