Emerald Battery Labs

Emerald Battery Labs develops anode materials for sodium-ion batteries. Sodium cells are inherently safer than lithium, they don't need cobalt or nickel or any other contested mineral, and the raw material is effectively unlimited: soda ash runs a few hundred dollars a ton against tens of thousands for lithium carbonate, and the US sits on billions of tons of it. What has held sodium back is energy density, and the anode is where that ceiling sits.

Emerald's materials are designed to lift sodium's density into the range where it can take real work from lithium, and to drop into cell lines as they are rather than requiring new ones. Every kilowatt-hour that moves to sodium is lithium that stays unmined and a supply chain that stays domestic, in a category where safety alone rules lithium out. Sodium's problem has always been the anode. That is the whole of what Emerald works on.