A new study expects to see more than 10 million EV charging stations worldwide by 2020.

Though Tesla Motors might have achieved its first-ever profit during the first quarter, sales of plug-in vehicles is generally lagging way below expectations, something analysts blame on the high price of battery-based vehicles as well as their limited range.

But the nascent electric vehicle market may get a big boost if a new study from IMS Research proves on target.  It predicts the number of EV charging stations will grow from a mere 135,000 worldwide in 2011 to as many as 10.7 million in 2020, with the fastest growth likely to occur in the U.S., China, Japan and Germany.

“While (EV and plug-in hybrid sales) volumes may not reach the levels imagined in the hype of 2009, it is clear that there needs to be charging infrastructure in place to support this change in mobility,” says Alastair Hayfield, associate director at IMS Research.

Though the study warns of “roadblocks” that could delay this rollout, it emphasizes that the increased availability of charging stations would be the best way to address the issue of “range anxiety,” fear that today’s battery vehicles won’t have enough power to get to their destination and back.

While plug-based vehicles are far more efficient than conventional gasoline-powered automobiles, even the most advanced battery packs can hold but a fraction of the energy in a tank of gasoline. In fact, it would take nearly 700 pounds of the most advanced of today’s lithium-ion batteries to store the same amount of power in a single gallon of gasoline.

As a result, most of today’s battery-electric vehicles have a maximum range of around 100 miles per charge, while plug-in hybrids typically get between 15 and 35 miles between charges.  The rare exceptions include the Tesla Model S with its extended battery pack. That version gets nearly 300 miles range – but costs nearly $100,000.

Even then, Tesla has begun taking steps of its own to deal with range anxiety, the California-based maker beginning to set up a network of so-called “supercharger,” or super-fast, battery chargers.

There are currently 5,894 EV charging stations in the U.S., reports the Department of Energy – not including those in private homes.

In the future, the national charging grid is likely to include significantly more private chargers, community-owned facilities – New York hoping to add at least 10,000 public spaces with access to chargers over the next seven years — chargers set up by employers to serve their workforce, and for-profit charging facilities such as the network being established by Texas-based eVgo.

There are skeptics who warn that the expansion of the charging infrastructure won’t go nearly as fast as anticipated.  There are, for example, compatibility issues, particularly when it comes to high-speed, or Level III, charging systems. There are currently two distinctly different global standards, notes IMS Research.

And then there’s the basic chicken-and-egg problem. Until sales of plug-based vehicles pick up those who hold the purse strings may be reluctant to authorize the funds for more chargers.

So far, battery-electric vehicles and plug-in hybrids have barely gained a 0.5% share of the U.S. new vehicle market and demand is expected to fall far short of the 1 million vehicles the Obama Administration had hoped to have on the road by the end of 2014.

Meanwhile, several once-promising makers, including Coda and Bright Automotive, have folded shop while Fisker Automotive is expected to soon declare bankruptcy.

On the other hand, Tesla outperformed its own optimistic forecast during the first quarter and sales of the Nissan Leaf has been running ahead of expectations for the last several months following the maker’s decision to cut prices after launching production of the battery-car in the U.S.