[philipkglass]

They claim a full size battery has a "possibility" to reach 800 Wh/L. I'll just use 800 for illustration. They don't report the specific gravity of a full battery, but for other lithium ion batteries a specific gravity of 2.5 - 3.0 might be reasonable.

800 / 2.5 would be 320 Wh/kg.

800 / 3.0 would be 267 Wh/kg.

Both numbers are quite good, as batteries go, but not an order of magnitude higher than what's available now.

[ksec]

For Reference, iPhone 6 and 6 Plus Battery are 250Wh/kg and 575 Wh/l

I dont have any data on newer iPhone 7 and 8 / X.

[pouetpouet]

An order of magnitude might be really hard and may be impossible to reach *1. Price, charging speed, and lifetime have more space. 5X charging speed is huge for EV.

1 https://www.youtube.com/watch?v=AdPqWv-eVIc

[hwillis]

pause the screen at 2:49- he's calculating the specific energy for a very specific chemistry, lithium cobalt oxide with a carbon anode. EVs don't even use that chemistry. It's more appropriate to use a more general formula.

Here's the most general possible one: only lithium. Each lithium atom gives up one electron, at some voltage. The standard electrode reference voltage of lithium is 3.04 volts. That works out to 26.8 amp-hours per mole, and 81.47 Wh/mole. A mole of lithium weighs 6.941 grams. The end result is 11.74 kWh/kg. That's the absolute, utter maximum energy density for a closed system battery (which is why li-air can exceed that figure).

I am continually surprised by how quickly capacity keeps increasing towards that. Battery capacity will easily double with tech quite similar to current, and 10x would not surprise me within my lifetime.