| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
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Materials Science for Global Development -- Health, Energy, and Environment: An SMD Symposium in Honor of Wole Soboyejo
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| Presentation Title |
The Influence of Surface Curvature on the Instability of Electrodeposition in Lithium Metal Batteries |
| Author(s) |
Chih-Hung Chen, Chi-Jyun Ko, Kuo-Ching Chen, Chun-Wei Pao |
| On-Site Speaker (Planned) |
Chih-Hung Chen |
| Abstract Scope |
Lithium metal is an ideal anode material for next-generation rechargeable batteries for its high theoretical capacity and low electrochemical potential. However, the highly unstable lithium plating-stripping process as battery cycles leads to the formation of lithium dendrites, and several drawbacks such as capacity decline, poor cycling life, and internal short-circuit risk. The stability of the electrodeposition is strongly affected by the passivation quality of a thin layer between the electrolyte and anode, also known as the solid electrolyte interphase (SEI). Enormous volume change of lithium anode during deposition could cause serious damage to SEI, and alter the lithium-ion migration behaviors. We propose a curvature-dependent deposition rate to explore two types of lithium-ion migration mechanisms, the slow pathway at the intact SEI and the fast pathway at the fractured SEI. Our simulation results suggest that the inhomogeneity of the lithium-ion transport mechanism is the key to the formation of mossy dendrites. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Energy Conversion and Storage, Mechanical Properties |