What would be interesting would be full lifecycle mgmt of 3D printed solid state batteries - meaning, do we want lithium ions leaching into the water table as billions of tiny batteries have entered the environment.
Look at all the little devices that have super small betteries sealed behind what will be micro-ploastics and lithium water pollution.
So, in addition to studying battery tech, hopefully we also treat how these devices will impact the environment over their lifetime.
[1] - https://www.youtube.com/watch?v=Jlt8_z86F-o [video]