[alephnerd]

Seawater based lithium extraction is very cost inefficient as it's basically just electrolysis.

This means the only options long term are Hydrogen and Sodium Solid State.

I'd recommend reading the Japanese government docs and presentations I linked above as they explain why Japan and it's companies are doing what they are doing.

[bryanlarsen]

$5/kg, 10-50 kg per vehicle. Not an obstacle.

https://cen.acs.org/materials/inorganic-chemistry/Can-seawat...