Prof. Yong Min Lee will give a talk on  “Digital-Twin-Driven 3D Structural, Electrochemical, and Mechanical Modeling and Simulations for All-Solid-State Batteries and Advanced LIBs” hosted by Prof. Masashi Okubo's Laboratory.

Speaker : Prof. Yong Min LEE (Dept. of Energy Sci. and Eng., DGIST, Republic of Korea)

Short Description:

Digital twin technology can build virtual replicas of materials or systems and simulates them. So it has attracted much attention in investigating all-solid-state batteries (ASSBs) through unveiling the inner microstructure of complex composite electrodes. Especially, since key design parameters such as specific contact area, effective ionic or electronic conductivity, etc. cannot be easily obtained from experiments, modeling must be an indispensable tool. Herein, we will introduce how to use the digital twin technology for ASSB research. There are two ways to create 3D microstructures of composite electrodes. The first “top-down” approach is to use hundreds of tomographic images using FIB-SEM, X-ray Microscope, or nano CT, which can reflect actual structures but must overcome low resolution or long post-processing time. On the other hand, the second one, so-called “bottom-up”, is to build 3D microstructures through utilizing design parameters like composition, particle size analysis, limited surface and cross-sectional images. This bottom-up method is very efficient to generate various structures and simulate them, but securing the structural consistency remains a challenging issue. Thus, we will present recent progress in upgrading both methods to unravel veiled parameters in ASSBs and LIBs and coupling digital-twinned electrode structures with not only electrochemical behaviours but also thermal and mechanical changes.

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