About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Multiphysics Modeling and Multi-Modal Imaging of Functional Materials
|
| Presentation Title |
Modeling the Impact of Stress and Roughness on Electrodeposition in All-Solid-State Batteries |
| Author(s) |
Kaniza Islam, Yanzhou Ji, Noriko Katsube |
| On-Site Speaker (Planned) |
Kaniza Islam |
| Abstract Scope |
All-solid-state batteries (ASSBs) offer high energy density and improved safety, but face challenges related to solid-solid interface instability and incompatibility. Despite the high stiffness of ceramic solid electrolytes (SEs), experimental evidence shows lithium penetration and dendritic growth, often initiated by minor surface roughness at the Li/SE interface. This study presents a 2D continuum model with electro-chemo-mechanical coupling, to investigate Li electrodeposition behaviors, under the interplay between surface roughness geometry and mechanical stress in Li-metal based ASSBs. Our analysis shows that mechanical stress plays a key role in the local deposition behavior, and that the surface roughness geometry affects the interfacial kinetics via affecting the interfacial normal stress distribution. These effects are especially pronounced near elongated protrusions. Insights into regularizing the Li/SE interfaces by designing an artificial interlayer will also be discussed. |