Of Density and Destiny—Progress and Limitations of Acoustic Analysis in Battery Systems

The conservation of mass and charge within a closed-form electrochemical energy cell (”battery”) is fundamental to our standing of chemical transport and reaction kinetics with a system. Since the volume of a battery must be constrained (though not conserved, necessarily), the density and density distribution of the evolving battery must contain state information about the system. In this talk, I will discuss our group’s effort in uncovering and exploiting this perspective to understand better battery state of charge, state of health, and chemo-structural evolution and heterogeneity.<!-- notionvc: 266a4ebb-ae2d-427f-839d-11e13a53418a -->