About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Multiphysics Models for Understanding and Enhancing Cycle and Calendar Life of Silicon-rich Lithium-ion Batteries |
Author(s) |
Ankit Verma, Peter Weddle, Andrew Colclasure |
On-Site Speaker (Planned) |
Ankit Verma |
Abstract Scope |
Calendar and cycle life of silicon anode lithium-ion batteries (LIBs) are dictated by the passivating nature of the solid electrolyte interphase (SEI) film growth coupled with large volumetric fluctuations of Si. In comparison to graphite SEI, silicon SEI exhibits reduced passivation while immense expansion of Si particles during lithiation can induce stress large stresses with pore closure and fracture. In this work, we develop multiscale electro-chemo-mechanics models to understand these limitations of the Si anode at the SEI (10s of nanometers) as well as electrode level (10s of microns). Furthermore, we use model predictions to devise strategies (electrochemical cycling window, electrode recipe, electrolyte additives etc.) for stable cycling and calendar aging of Si rich systems. |
Proceedings Inclusion? |
Planned: |