@Timmy ... (#plastic) separator membrane. Beyond all this, there's a variety of minor additives, as well as the small amount of #lithium itself.

The main limiting factor in scaleup however is none of this; it's plant capacity. And in particular, film synthesis for the jelly rolls. Traditionally this is done with a wet-phase process, but this requires #VacuumOven.s the length of a football pitch for each line to extract the #solvent.