Digital Twin-Driven All-Solid-State Lithium-Ion Battery

All-solid-state lithium-ion battery (ASLB) is one of the battery systems to have the most outstanding safety and energy density. In particular, the ASLB with solid sulfide electrolyte has been evaluated as a promising next-generation secondary battery thanks to solid sulfide electrolyte’s high intrinsic ionic conductivity and deformation property. However, the electrochemical performance of present ASLB like rate capability and cycle life is not a level to compete with anyone of commercial lithium-ion batteries because the design optimization of the all-solid-state electrode has not been completed. In other words, it is very important to understand the correlation of the electrode design and performance of the cell, however, it is extremely limited to analyze them only on the experimental process and discover better electrode designs. To lessen this difficulty, we successfully built up a digital twin ASLB that can confirm the phenomena inner ASLB such as ion flow, state of charge, and overpotential of active materials, etc. on 3D structure as well as predict its performance. The simulation results are also compared with the experimental data to verify the reliability of our digital twin model. We expect this approach not only must be used for the electrode design in ASLBs but also will be able to be utilized for other all-solid-state electrode systems.