| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
|
| Presentation Title |
Real-time Observations of Chemo-mechanical Behaviors of Si-based Anodes for Advanced Lithium-ion Batteries |
| Author(s) |
Jung-Hyun Kim |
| On-Site Speaker (Planned) |
Jung-Hyun Kim |
| Abstract Scope |
Wide-spread adoption of Si-based anodes have been obstructed by limited cycle life which stems from abnormal volumetric expansion behaviors. To address this issue, this presentation will introduce our recent efforts on characterization of Si-based anodes via distribution of relaxation times (DRT) analysis and in-situ/operando atomic force microscopy (AFM).
First, systematic DRT analyses of Si and SiO anodes allowed to deconvolute the origins of individual polarization losses and their evolutions under different operating conditions. Second, we compared wetting behaviors of Na-alginate and poly(vinylidene fluoride) binders in contact with liquid electrolytes in terms of modulus and adhesion force. Finally, we performed real-time monitoring of Si particle pulverization – irreversible volume expansion – crack generation phenomena during early stage of anode cycling. The results provided a direct evidence for chemo-mechanical coupling effects of Si anodes and offered a strategy to mitigate their tensile stress during cycling. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Characterization, Nanotechnology |