@BigDaniel I don't actually know anything about Lithium recycling. I do know that Silicon is absolutely not up for the task. I see that LIT https://lithium-au.com/recycling/ have a spread on it.
It would make sense at least to have an offload, or supply contract with others for EGR. Sure, i think its a great thought. I wonder if any of the guys in the EGR thread could help you with that specific question there are alot of guys and gals on that thread that could.