Not sure where our good buddy @Hypx@fedia.io went, but let me assure you. As of right now, 100% of available hydrogen stocks are fossil fuels derived.

Hydrogen vehicles being green is a fantasy pedaled by fossil fuel companies to not have to move away from natural gas. While it is possible to generate hydrogen through electrolysis, functionally, none actually is. It’s far far cheaper to do so from natural gas, and probably always will be.

Promoting hydrogen as a “solution” is basically promoting fossil fuels green washing.

And I’m not sure where you are getting you information on lithium, but it’s probably the best short and medium term option. Beyond that, gravity storage (pump water up hills, and maybe some kind of hydrogen system that doesn’t require transporting the stuff where it can be made and stored in place when solar or wind energy is abundant.