Multiscale and multiphysics battery imaging and modeling
To fully address safety and cycle life issues in solid-state batteries, one must rethink electrochemical processes from the perspective of multiphysics coupling. The lack of tools and theoretical models to directly visualize the evolution of and precisely describe the correlations between different physicochemical fields fundamentally limits the development of solid-state batteries.
Through the development of multiphysics imaging methods based on photoacoustic microscopy, confocal Raman, and computed X-ray tomography, we realized the three-dimensional reconstruction of the electrochemical field and stress field in all-solid-state batteries, which lays a foundation for revealing the electro-mechanical coupling mechanism at the interface between lithium metal and solid-state electrolyte.
As for modeling aspects, we can bridge varied physical fields, material properties, and electrochemical performance across continuous to atomic scales by phase-field modeling and first-principle calculations. Along with multiphysics imaging methods, we can clarify the electrochemical deposition process and the microscopic mechanism of failure and capacity loss.
Publication:
- Zhou, J., Y. Zhao, H. Liu, X. Tang, S.-L. Chen and S. H. Bo (2022). “Rapid 3D nondestructive imaging technology for batteries: Photoacoustic microscopy.” Journal of Materials Research: 1-14.
- Sun, Z. T., J. Zhou, Y. Wu and S. H. Bo (2022). “Mapping and modeling physicochemical fields in solid-state batteries. ” Journal of Physical Chemistry Letter 13: 10816-10822.
- Hu, J., Z. T. Sun, Y. Gao and S. H. Bo (2022). “3D stress mapping reveals the origin of lithium-deposition heterogeneity in solid-state lithium-metal batteries.” Cell Reports Physical Science 3: 100938.
- Sun, Z. T. and S. H. Bo (2022). “Understanding electro-mechanical-thermal coupling in solid-state lithium metal batteries via phase-field modeling.” Journal of Materials Research: 1-16.