Electric vehicle is a small percentage of lithium demand. Most of the demand will come from energy storage and China. If you're interested in investing in energy storage, have a look at Electrovaya (EFL, Toronto Stock Exchange) or US OTCMKTS:EFLVF.
Electrovaya already has a $1 billion battery factory and its sales are skyrocketing.
Investing in lithium today is like investing in the dotcom bubble in 1998. People were making 10-100x their money. In 2000, it burst. Lithium will follow a similar pattern, IMO.
Disclaimer: I hold Orocobre, Lithium X, Nemaska, International Lithium, Electrovaya, and Nano One Materials.
I also trade a bunch of lithium juniors, such as LEXG, Durango Resources, 92 Resources, etc.
In a typical lithium-ion battery, there is roughly 10 times more graphite than lithium. So, graphite miners may also be a good investment. Two graphite miners come to mind: Northern Graphite, Alabama Graphite.
I hope LEXG gets with the program! It already has the appealing name.