[baq]

this is not that simple. the article claims that density is similar to lithium batteries, but it doesn't say what kind of density is it. the fact that it charges 20x as much may mean naught if it holds 1/20 energy per kg or per liter.

[StavrosK]

What do you mean "what kind of density"? "Similar to lithium batteries" means just that, if you have a lithium battery of a certain size, this will hold an amount of energy similar to that.

[marvin]

A 30% difference would still be classified as "similar", but this would still be a big deal since batteries are just borderline capable to provide electric cars with sufficient charge to be acceptable for most people. A battery that's 30% worse than the best current batteries would be unusable.

[selectodude]

A car that could charge in 5 minutes and go 200 miles would be as useful to me as my current car. It's a start.

[ctdonath]

He's referring more to a car that could charge in 5 minutes and go 60 miles.

As I have an EV, that's closer to my current scenario of charging (once they put in a charger in the office parking lot) 4 hours and going 90 miles. The tradeoff of reduced distance for superior charge time is...irritating.

[selectodude]

60 miles would be just short enough where I would need a gasoline car. That's why I've yet to get a Leaf. Can't afford a Tesla (nor do I want/need a car that big).

[Tuna-Fish]

Energy density can be given in terms of mass or in terms of volume. In general, if a source of a new interesting battery technology does not describe which one they mean in a comparison, you can assume the worst, that is, that they are comparable to lithium-ion in joules/m^3 (at which lithium ion isn't actually that good).

[barrkel]

Direct quote from the article: This unique battery offers energy density comparable to a lithium ion battery

I have no idea about how credible its claims are.

[tormeh]

I meant about the space in general. Sorry about the confusion. I've edited my post.