Having 3 times the energy density of existing lithium batteries is good, but fossil fuels have about 100 times the energy density of batteries. So it is a step in the right direction, albeit a big/small one depending on the point of reference.

No because it will never have 500 to 600 mile range like the new SUV's and pick ups with a diesel engine. Would like to stop once for fuel on a long trip or 3-5 times to recharge your battery!!!!!!!

While it's good to know that someone is working on the next big break through in battery technology, all this is just vapor-ware with a vague promise/dream of something in the future. This is what might be, not what is. Tell me when it's close to production so that this isn't the "in the next 20 years" nuclear fusion promise that's been made for the last 30 years!

Battery technology is just one, albeit important, part of what will make electric vehicles practical - : Batteries must have a common form factor to be interchangeable and swappable in order to avoid lengthy stops for recharging, and the ridiculous variations of charge points. Just swap, and go! (and car batteries could be used as distributed grid storage, increasing the utility of renewables)

"On his to-do list: Invent a battery that will end our dependence on fossil fuels"
Umm, no. Batteries store energy, not create it- it still has to come from somewhere.
That said, this is still hopeful news- it will go a long way towards cleaning up the air in major cities.
Furthermore, this article puts the lie to the movie "Who Killed The Electric Car"- there never was the "magic" battery that was alluded to in that movie, and all the interest in new battery technology by industry and manufacturers shows that there is no "conspiracy" by Big Oil to prevent us from going EV.
The tech wasn't there yet, and obviously still isn't- but it will be...

Reading the comments here sort of reminds me of the critics of the Wright brothers, and those who said you could not breath if a train went faster than 27 miles per hour. Absolutism leads to less than credibility.

Battery solutions already exist with current battery technology.
Chevy Bolt EV w/ 238 mi for as little as $27-30K after incentives. Chevy Spark EV w/ 82 mi for as little as $15-18K after incentives. Nissan Leaf ... BMW i3 ... Tesla ...

Stopping to refill your batteries in not a big deal breaker if they recharge quickly enough. Most people are quite happy to just recharge their car each night for daily living needs.
Also in most cases, as cars like the Tesla have proven, most people most of the time don't need a 500 to 600 mile range. They just drive to work and back, to the store or a weekend trip with no problems.
When people do need it, for a once a year drive, they can rent a car cheaper than owning two or take a plane, train or bus.

As comment writer JeremyHinton notes, we need a common/universal form factor for batteries, at least until some sort of instant charging system is created. When you think about it, the system that is currently in place for most vehicles (gasoline or diesel) is essentially the type of common or universal form factor that batteries will need to become in order to achieve true acceptance.

I would like to have a lithium battery that supports electric bicycles, charges quickly, and can last for at least 50 miles. I don't think I would like to wait on automobile companies for their acceptance. After all, who wants to haul around 2 tons of metal? Markets could be the US, China, and India.