According to at least one market report, there are around 60 million Electric Vehicles on the road today, globally. Despite that large figure we're still making giant improvements to the batteries that power these vehicles. 

Scientific pioneers from chemists to physicists to engineers and many other backgrounds are pushing the limits of what EV batteries can do: how fast they charge, how much energy they can store, what temperatures they can survive, how to make them safer, how to make them less expensive, what materials and chemistries can be more commercially-feasible for mass production, etc. 

Lots of studies. Lots of research. Lots of money.

This article talks about new advancements in Lithium Iron Phosphate technology that can charge the batteries much faster and keep the batteries alive much longer. 

Private companies, government laboratories, universities, and other organizations will continue to spend billions of dollars in the coming years to develop new innovations in battery technology, and EV buyers and consumers are going to benefit with higher-performing (and safer) products.