Seems a bit of scaremongering to me. Sure Tesla's needs may exceed the current world production of Lithium, but the level of production is based on the need and has been climbing steeply for several years (see https://en.wikipedia.org/wiki/Lithium#/media/File:Lithium_world_production.svg). Yes, the price of Lithium might well double, but the raw material is actually not a high percentage of the cost of a finished battery.
According to Wikipedia: "However, according to a 2011 study conducted at Lawrence Berkeley National Laboratory and the University of California, Berkeley, the currently estimated reserve base of lithium should not be a limiting factor for large-scale battery production for electric vehicles because an estimated 1 billion 40 kWh Li-based batteries could be built with current reserves"
So ramp up the production and there's no immediate problem. Longer term we may have to look at other battery technologies but Lithium's good for a while yet.
According to Wikipedia: "However, according to a 2011 study conducted at Lawrence Berkeley National Laboratory and the University of California, Berkeley, the currently estimated reserve base of lithium should not be a limiting factor for large-scale battery production for electric vehicles because an estimated 1 billion 40 kWh Li-based batteries could be built with current reserves"
So ramp up the production and there's no immediate problem. Longer term we may have to look at other battery technologies but Lithium's good for a while yet.