I worked this out a while back, based on the percentage of the earth’s crust that is lithium and the percentage of a car that is lithium.

I worked out that you could cover > 10% of the planet with EVs if Lithium was the only bottleneck resource.

The bigger problem is the environmental impact of extracting the lithium. My guess is that desalination plants would be a big part of my plan to cover the planet with EVs.

(We’ll probably need desalination anyway because we keep electing politicians that are intentionally causing increasingly severe droughts).